diff --git a/.gitignore b/.gitignore
index b09bf24..30f49f8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,15 +1,2 @@
 About_me.md
-modules/Communication/comm-backups/comm-2021-09-02_204206.zip
-modules/Communication/comm-backups/comm-2021-09-02_205039.zip
-modules/Communication/comm-backups/comm-2021-09-02_210753.zip
-modules/Communication/comm-backups/comm-2021-09-04_210257.zip
-modules/Communication/comm-backups/comm-2021-09-04_211801.zip
-modules/Communication/comm-backups/comm-2021-09-04_212304.zip
-modules/Communication/comm-backups/comm-2021-09-04_212942.zip
-modules/Communication/comm-backups/comm-2021-09-04_221648.zip
-modules/Communication/comm-backups/comm-2021-09-05_123151.zip
-modules/Communication/comm-backups/comm-2021-09-05_212516.zip
-modules/Communication/comm-backups/comm-2021-09-05_213852.zip
-modules/Communication/comm-backups/comm-2021-09-05_214615.zip
-modules/Communication/comm-backups/comm-2021-09-05_215124.zip
-modules/Communication/comm-backups/comm-2021-09-05_220926.zip
+modules/Communication/comm-backups
\ No newline at end of file
diff --git a/modules/Communication/Stack_connector.kicad_sch b/modules/Communication/Stack_connector.kicad_sch
index 4e29649..80343e0 100644
--- a/modules/Communication/Stack_connector.kicad_sch
+++ b/modules/Communication/Stack_connector.kicad_sch
@@ -371,13 +371,11 @@
   (no_connect (at 139.7 95.25) (uuid 1b31ae78-7a8a-494c-8f2b-d3e09f16f068))
   (no_connect (at 139.7 113.03) (uuid 90ba890b-d7c9-4aff-9a91-7b391800a555))
   (no_connect (at 152.4 69.85) (uuid c873c7a6-bfb4-4b90-86b9-fb24c8bb8243))
-  (no_connect (at 152.4 74.93) (uuid c873c7a6-bfb4-4b90-86b9-fb24c8bb8243))
   (no_connect (at 152.4 80.01) (uuid 03115a87-8ca9-4ecc-af3b-103da6746441))
   (no_connect (at 152.4 82.55) (uuid 1b31ae78-7a8a-494c-8f2b-d3e09f16f068))
   (no_connect (at 152.4 85.09) (uuid 1b31ae78-7a8a-494c-8f2b-d3e09f16f068))
   (no_connect (at 152.4 87.63) (uuid 1b31ae78-7a8a-494c-8f2b-d3e09f16f068))
   (no_connect (at 152.4 95.25) (uuid 1b31ae78-7a8a-494c-8f2b-d3e09f16f068))
-  (no_connect (at 152.4 107.95) (uuid 90ba890b-d7c9-4aff-9a91-7b391800a555))
   (no_connect (at 152.4 113.03) (uuid 90ba890b-d7c9-4aff-9a91-7b391800a555))
 
   (wire (pts (xy 138.43 66.04) (xy 138.43 67.31))
@@ -469,6 +467,10 @@
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid cce0bba4-ccf5-471d-a86c-58e72d415edc)
   )
+  (hierarchical_label "ESP#1_CHARGE" (shape input) (at 152.4 74.93 0)
+    (effects (font (size 1.27 1.27)) (justify left))
+    (uuid bdcba61c-28e5-4c93-ad80-c203cffb9716)
+  )
   (hierarchical_label "CAN_H" (shape input) (at 152.4 90.17 0)
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid 5935d64f-6aa0-4624-8144-368cd9d6275f)
@@ -489,6 +491,10 @@
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid d78e7107-96be-4d00-9b69-7be0091a72fb)
   )
+  (hierarchical_label "ESP#2_CHARGE" (shape input) (at 152.4 107.95 0)
+    (effects (font (size 1.27 1.27)) (justify left))
+    (uuid 78d4c077-ee5e-495b-aeb6-e333cef8dfe6)
+  )
   (hierarchical_label "EPS#2_1V8" (shape input) (at 152.4 110.49 0)
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid a1b815ab-314f-4c61-b96c-1e19f75525a3)
diff --git a/modules/Communication/battSwitch.kicad_sch b/modules/Communication/battSwitch.kicad_sch
new file mode 100644
index 0000000..be7ce0e
--- /dev/null
+++ b/modules/Communication/battSwitch.kicad_sch
@@ -0,0 +1,457 @@
+(kicad_sch (version 20210621) (generator eeschema)
+
+  (uuid a4613bd3-102e-4456-ab4f-5adcc36942d4)
+
+  (paper "A4")
+
+  (lib_symbols
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+      (property "Reference" "U" (id 0) (at 7.62 2.54 0)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "Value" "TLV172IDCK" (id 1) (at 11.43 -2.54 0)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "Footprint" "Package_TO_SOT_SMD:SOT-353_SC-70-5" (id 2) (at 5.08 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "Datasheet" "http://www.ti.com/lit/ds/symlink/tlv172.pdf" (id 3) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_keywords" "op amp operational amplifier" (id 4) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_description" "Low-power Operational Amplifier, SOT-353" (id 5) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_fp_filters" "SOT*353*SC*70*" (id 6) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (symbol "TLV172IDCK_0_1"
+        (polyline
+          (pts
+            (xy -2.54 5.08)
+            (xy -2.54 -5.08)
+            (xy 7.62 0)
+            (xy -2.54 5.08)
+          )
+          (stroke (width 0.254)) (fill (type background))
+        )
+      )
+      (symbol "TLV172IDCK_1_1"
+        (pin input line (at -5.08 2.54 0) (length 2.54)
+          (name "+" (effects (font (size 1.27 1.27))))
+          (number "1" (effects (font (size 1.27 1.27))))
+        )
+        (pin power_in line (at 0 -7.62 90) (length 3.81)
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+          (number "2" (effects (font (size 1.27 1.27))))
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+          (number "3" (effects (font (size 1.27 1.27))))
+        )
+        (pin output line (at 10.16 0 180) (length 2.54)
+          (name "~" (effects (font (size 1.27 1.27))))
+          (number "4" (effects (font (size 1.27 1.27))))
+        )
+        (pin power_in line (at 0 7.62 270) (length 3.81)
+          (name "V+" (effects (font (size 1.27 1.27))))
+          (number "5" (effects (font (size 1.27 1.27))))
+        )
+      )
+    )
+    (symbol "Device:R" (pin_numbers hide) (pin_names (offset 0)) (in_bom yes) (on_board yes)
+      (property "Reference" "R" (id 0) (at 2.032 0 90)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "Value" "R" (id 1) (at 0 0 90)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "Footprint" "" (id 2) (at -1.778 0 90)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "Datasheet" "~" (id 3) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_keywords" "R res resistor" (id 4) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_description" "Resistor" (id 5) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_fp_filters" "R_*" (id 6) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (symbol "R_0_1"
+        (rectangle (start -1.016 -2.54) (end 1.016 2.54)
+          (stroke (width 0.254)) (fill (type none))
+        )
+      )
+      (symbol "R_1_1"
+        (pin passive line (at 0 3.81 270) (length 1.27)
+          (name "~" (effects (font (size 1.27 1.27))))
+          (number "1" (effects (font (size 1.27 1.27))))
+        )
+        (pin passive line (at 0 -3.81 90) (length 1.27)
+          (name "~" (effects (font (size 1.27 1.27))))
+          (number "2" (effects (font (size 1.27 1.27))))
+        )
+      )
+    )
+    (symbol "comm:TPS2116" (in_bom yes) (on_board yes)
+      (property "Reference" "U" (id 0) (at 3.81 12.7 0)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "Value" "TPS2116" (id 1) (at 3.81 -8.89 0)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "Footprint" "" (id 2) (at 3.81 12.7 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "Datasheet" "" (id 3) (at 3.81 12.7 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (symbol "TPS2116_0_1"
+        (rectangle (start -2.54 11.43) (end 10.16 -6.35)
+          (stroke (width 0.1524)) (fill (type background))
+        )
+      )
+      (symbol "TPS2116_1_1"
+        (pin input line (at -5.08 7.62 0) (length 2.54)
+          (name "GND" (effects (font (size 1.27 1.27))))
+          (number "1" (effects (font (size 1.27 1.27))))
+        )
+        (pin output line (at -5.08 3.81 0) (length 2.54)
+          (name "VOUT" (effects (font (size 1.27 1.27))))
+          (number "2" (effects (font (size 1.27 1.27))))
+        )
+        (pin input line (at -5.08 0 0) (length 2.54)
+          (name "VIN1" (effects (font (size 1.27 1.27))))
+          (number "3" (effects (font (size 1.27 1.27))))
+        )
+        (pin input line (at -5.08 -3.81 0) (length 2.54)
+          (name "PR1" (effects (font (size 1.27 1.27))))
+          (number "4" (effects (font (size 1.27 1.27))))
+        )
+        (pin input line (at 12.7 7.62 180) (length 2.54)
+          (name "MODE" (effects (font (size 1.27 1.27))))
+          (number "5" (effects (font (size 1.27 1.27))))
+        )
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+          (number "6" (effects (font (size 1.27 1.27))))
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+        (pin output line (at 12.7 -3.81 180) (length 2.54)
+          (name "ST" (effects (font (size 1.27 1.27))))
+          (number "8" (effects (font (size 1.27 1.27))))
+        )
+      )
+    )
+    (symbol "power:GND" (power) (pin_names (offset 0)) (in_bom yes) (on_board yes)
+      (property "Reference" "#PWR" (id 0) (at 0 -6.35 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "Value" "GND" (id 1) (at 0 -3.81 0)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "Footprint" "" (id 2) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "Datasheet" "" (id 3) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_keywords" "power-flag" (id 4) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_description" "Power symbol creates a global label with name \"GND\" , ground" (id 5) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (symbol "GND_0_1"
+        (polyline
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+          (stroke (width 0)) (fill (type none))
+        )
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+      (symbol "GND_1_1"
+        (pin power_in line (at 0 0 270) (length 0) hide
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+          (number "1" (effects (font (size 1.27 1.27))))
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+    (uuid 1472e447-3c62-4c0b-958b-d86740274593)
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+    (uuid 5edab2b6-9ffb-4ae1-b1f0-54ddc7ce5659)
+    (property "Reference" "#PWR?" (id 0) (at 61.595 57.15 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Value" "GND" (id 1) (at 61.595 54.61 0))
+    (property "Footprint" "" (id 2) (at 61.595 50.8 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 61.595 50.8 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 95cec886-9830-453d-9e51-7ddedc63035c))
+  )
+
+  (symbol (lib_id "power:GND") (at 129.54 37.465 270) (unit 1)
+    (in_bom yes) (on_board yes) (fields_autoplaced)
+    (uuid 8f2e9cba-6539-40c4-8553-4b1e6f27056f)
+    (property "Reference" "#PWR?" (id 0) (at 123.19 37.465 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Value" "GND" (id 1) (at 125.73 37.465 0))
+    (property "Footprint" "" (id 2) (at 129.54 37.465 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 129.54 37.465 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 79a5317a-fa86-417e-b6e6-4519b2e9c826))
+  )
+
+  (symbol (lib_id "Device:R") (at 46.99 45.72 90) (unit 1)
+    (in_bom yes) (on_board yes)
+    (uuid fa1153a5-a5fa-4a23-beb6-5d04d6d9feea)
+    (property "Reference" "R?" (id 0) (at 46.99 43.18 90))
+    (property "Value" "50k" (id 1) (at 46.99 45.72 90))
+    (property "Footprint" "" (id 2) (at 46.99 47.498 90)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "~" (id 3) (at 46.99 45.72 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid fbe092c6-03f8-4069-9908-723738a3ee28))
+    (pin "2" (uuid e0c4f070-f0fc-4800-8b29-af4c816ecb34))
+  )
+
+  (symbol (lib_id "Device:R") (at 61.595 59.69 90) (unit 1)
+    (in_bom yes) (on_board yes)
+    (uuid a9384195-1737-4983-9989-a78383bb8645)
+    (property "Reference" "R?" (id 0) (at 61.595 62.23 90))
+    (property "Value" "330k" (id 1) (at 61.595 59.69 90))
+    (property "Footprint" "" (id 2) (at 61.595 61.468 90)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "~" (id 3) (at 61.595 59.69 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 13b29974-fb2d-4a28-9e0a-71d64eb99eb7))
+    (pin "2" (uuid 3618f472-99b2-4afe-b4cb-c95f464ffbef))
+  )
+
+  (symbol (lib_id "Amplifier_Operational:TLV172IDCK") (at 61.595 43.18 0) (unit 1)
+    (in_bom yes) (on_board yes)
+    (uuid 3ed63a54-f90b-486a-a926-491ab3eac668)
+    (property "Reference" "U?" (id 0) (at 67.945 38.7349 0)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Value" "TVL3691" (id 1) (at 69.215 47.625 0))
+    (property "Footprint" "" (id 2) (at 66.675 43.18 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "http://www.ti.com/lit/ds/symlink/tlv172.pdf" (id 3) (at 61.595 43.18 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 56a61932-57e1-439f-ad6d-cf091833e1a8))
+    (pin "2" (uuid 2d0b9ae3-4f80-4bf4-83b5-139041ff3c75))
+    (pin "3" (uuid ad735793-57c5-4a99-9497-c46549993381))
+    (pin "4" (uuid 2ef7eed5-6f3c-4a37-bcc3-37b27d0c1669))
+    (pin "5" (uuid 0d6ad70c-7f30-41cd-a454-8accfbdd302d))
+  )
+
+  (symbol (lib_id "comm:TPS2116") (at 142.875 45.085 0) (unit 1)
+    (in_bom yes) (on_board yes) (fields_autoplaced)
+    (uuid dfe84c23-724a-48a4-ab09-8dd0b9b44ba3)
+    (property "Reference" "U?" (id 0) (at 146.685 30.48 0))
+    (property "Value" "TPS2116" (id 1) (at 146.685 53.975 0))
+    (property "Footprint" "" (id 2) (at 146.685 32.385 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 146.685 32.385 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid edb307b3-669b-4378-9af1-4d4dbb07ae99))
+    (pin "2" (uuid 22ccc698-7673-436c-8b3f-992c979a6174))
+    (pin "3" (uuid 981aaddb-b607-450a-8d3b-53cfae1e9bab))
+    (pin "4" (uuid 1f82853d-25b0-4938-baa8-c25f76301b16))
+    (pin "5" (uuid cc0c9fae-2fb6-4388-bd46-be4268fdb332))
+    (pin "6" (uuid 4b006ece-4c29-45dd-9260-773e82b081de))
+    (pin "7" (uuid 4a2b52a2-3a72-419c-89ad-c68003d79962))
+    (pin "8" (uuid ae694c39-8cbd-4b8c-a084-b28fa4124a50))
+  )
+)
diff --git a/modules/Communication/calc.ipynb b/modules/Communication/calc.ipynb
new file mode 100644
index 0000000..0f7b301
--- /dev/null
+++ b/modules/Communication/calc.ipynb
@@ -0,0 +1,66 @@
+{
+ "metadata": {
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.7"
+  },
+  "orig_nbformat": 4,
+  "kernelspec": {
+   "name": "python3",
+   "display_name": "Python 3.9.7 64-bit"
+  },
+  "interpreter": {
+   "hash": "c7df07ecfb874d96581378ee2edfb0abd56d9de008e1391e0ed3612e4e80d4b7"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2,
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "source": [
+    "# Battery voltage comparator with histerezes\r\n",
+    "\r\n",
+    "\r\n",
+    "supply_voltage = 3.3\r\n",
+    "reference_voltage = 3\r\n",
+    "\r\n",
+    "R1 = 50000\r\n",
+    "R2 = 330000\r\n",
+    "\r\n",
+    "Vin_High = R1 * (reference_voltage / R2) + reference_voltage \r\n",
+    "\r\n",
+    "print(\"Voltage switch to high: {}V\".format(round(Vin_High,2)))\r\n",
+    "\r\n",
+    "Vin_Low = (reference_voltage*(R1+R2) - supply_voltage * R1) / R2\r\n",
+    "\r\n",
+    "print(\"Voltage switch to low: {}V\".format(round(Vin_Low,2)))\r\n",
+    "\r\n",
+    "Vin_delta = supply_voltage * (R1/R2)\r\n",
+    "\r\n",
+    "print(\"Voltage delta: {}V\".format(round(Vin_delta,2)))\r\n"
+   ],
+   "outputs": [
+    {
+     "output_type": "stream",
+     "name": "stdout",
+     "text": [
+      "Voltage switch to high: 3.45V\n",
+      "Voltage switch to low: 2.95V\n",
+      "Voltage delta: 0.5V\n"
+     ]
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
\ No newline at end of file
diff --git a/modules/Communication/comm.bak b/modules/Communication/comm.bak
new file mode 100644
index 0000000..9d02ff2
--- /dev/null
+++ b/modules/Communication/comm.bak
@@ -0,0 +1,225 @@
+(kicad_symbol_lib (version 20210619) (generator kicad_symbol_editor)
+  (symbol "comm:NEO-8Q" (in_bom yes) (on_board yes)
+    (property "Reference" "U" (id 0) (at 0 13.97 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Value" "NEO-8Q" (id 1) (at 0 -27.94 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Footprint" "" (id 2) (at 0 0 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 0 0 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (symbol "NEO-8Q_0_1"
+      (rectangle (start -12.7 11.43) (end 13.97 -24.13)
+        (stroke (width 0.1524)) (fill (type background))
+      )
+    )
+    (symbol "NEO-8Q_1_1"
+      (pin input line (at 16.51 -21.59 180) (length 2.54)
+        (name "SAFEBOOT_N" (effects (font (size 1.27 1.27))))
+        (number "1" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 16.51 3.81 180) (length 2.54)
+        (name "GND" (effects (font (size 1.27 1.27))))
+        (number "10" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 16.51 6.35 180) (length 2.54)
+        (name "RF_IN" (effects (font (size 1.27 1.27))))
+        (number "11" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 16.51 8.89 180) (length 2.54)
+        (name "GND" (effects (font (size 1.27 1.27))))
+        (number "12" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at -15.24 8.89 0) (length 2.54)
+        (name "GND" (effects (font (size 1.27 1.27))))
+        (number "13" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at -15.24 6.35 0) (length 2.54)
+        (name "LNA_EN" (effects (font (size 1.27 1.27))))
+        (number "14" (effects (font (size 1.27 1.27))))
+      )
+      (pin free line (at -15.24 3.81 0) (length 2.54)
+        (name "Reserved" (effects (font (size 1.27 1.27))))
+        (number "15" (effects (font (size 1.27 1.27))))
+      )
+      (pin free line (at -15.24 1.27 0) (length 2.54)
+        (name "Reserved" (effects (font (size 1.27 1.27))))
+        (number "16" (effects (font (size 1.27 1.27))))
+      )
+      (pin free line (at -15.24 -1.27 0) (length 2.54)
+        (name "Reserved" (effects (font (size 1.27 1.27))))
+        (number "17" (effects (font (size 1.27 1.27))))
+      )
+      (pin bidirectional line (at -15.24 -6.35 0) (length 2.54)
+        (name "SDA/SPICS_N" (effects (font (size 1.27 1.27))))
+        (number "18" (effects (font (size 1.27 1.27))))
+      )
+      (pin bidirectional line (at -15.24 -8.89 0) (length 2.54)
+        (name "SCL/SPICLK" (effects (font (size 1.27 1.27))))
+        (number "19" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 16.51 -19.05 180) (length 2.54)
+        (name "D_SEL" (effects (font (size 1.27 1.27))))
+        (number "2" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at -15.24 -11.43 0) (length 2.54)
+        (name "TDX/SPIMISO" (effects (font (size 1.27 1.27))))
+        (number "20" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at -15.24 -13.97 0) (length 2.54)
+        (name "RDX/SPIMOSI" (effects (font (size 1.27 1.27))))
+        (number "21" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at -15.24 -16.51 0) (length 2.54)
+        (name "V_BCKP" (effects (font (size 1.27 1.27))))
+        (number "22" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at -15.24 -19.05 0) (length 2.54)
+        (name "VCC" (effects (font (size 1.27 1.27))))
+        (number "23" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at -15.24 -21.59 0) (length 2.54)
+        (name "GND" (effects (font (size 1.27 1.27))))
+        (number "24" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at 16.51 -16.51 180) (length 2.54)
+        (name "TIMEPULSE" (effects (font (size 1.27 1.27))))
+        (number "3" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 16.51 -13.97 180) (length 2.54)
+        (name "EXTINT" (effects (font (size 1.27 1.27))))
+        (number "4" (effects (font (size 1.27 1.27))))
+      )
+      (pin bidirectional line (at 16.51 -11.43 180) (length 2.54)
+        (name "USB_DM" (effects (font (size 1.27 1.27))))
+        (number "5" (effects (font (size 1.27 1.27))))
+      )
+      (pin bidirectional line (at 16.51 -8.89 180) (length 2.54)
+        (name "USB_DP" (effects (font (size 1.27 1.27))))
+        (number "6" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 16.51 -6.35 180) (length 2.54)
+        (name "VDD_USB" (effects (font (size 1.27 1.27))))
+        (number "7" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 16.51 -1.27 180) (length 2.54)
+        (name "RESET_N" (effects (font (size 1.27 1.27))))
+        (number "8" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at 16.51 1.27 180) (length 2.54)
+        (name "VCC_RF" (effects (font (size 1.27 1.27))))
+        (number "9" (effects (font (size 1.27 1.27))))
+      )
+    )
+  )
+  (symbol "comm:TPS2116" (in_bom yes) (on_board yes)
+    (property "Reference" "U" (id 0) (at 3.81 12.7 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Value" "TPS2116" (id 1) (at 3.81 -8.89 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Footprint" "" (id 2) (at 3.81 12.7 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 3.81 12.7 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (symbol "TPS2116_0_1"
+      (rectangle (start -2.54 11.43) (end 10.16 -6.35)
+        (stroke (width 0.1524)) (fill (type background))
+      )
+    )
+    (symbol "TPS2116_1_1"
+      (pin input line (at -5.08 7.62 0) (length 2.54)
+        (name "GND" (effects (font (size 1.27 1.27))))
+        (number "1" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at -5.08 3.81 0) (length 2.54)
+        (name "VOUT" (effects (font (size 1.27 1.27))))
+        (number "2" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at -5.08 0 0) (length 2.54)
+        (name "VIN1" (effects (font (size 1.27 1.27))))
+        (number "3" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at -5.08 -3.81 0) (length 2.54)
+        (name "PR1" (effects (font (size 1.27 1.27))))
+        (number "4" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 12.7 7.62 180) (length 2.54)
+        (name "MODE" (effects (font (size 1.27 1.27))))
+        (number "5" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 12.7 3.81 180) (length 2.54)
+        (name "VIN2" (effects (font (size 1.27 1.27))))
+        (number "6" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at 12.7 0 180) (length 2.54)
+        (name "VOUT" (effects (font (size 1.27 1.27))))
+        (number "7" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at 12.7 -3.81 180) (length 2.54)
+        (name "ST" (effects (font (size 1.27 1.27))))
+        (number "8" (effects (font (size 1.27 1.27))))
+      )
+    )
+  )
+  (symbol "comm:TSP2116" (in_bom yes) (on_board yes)
+    (property "Reference" "U" (id 0) (at 3.81 12.7 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Value" "TSP2116" (id 1) (at 3.81 -8.89 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Footprint" "" (id 2) (at 3.81 12.7 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 3.81 12.7 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (symbol "TSP2116_0_1"
+      (rectangle (start -2.54 11.43) (end 10.16 -6.35)
+        (stroke (width 0.1524)) (fill (type background))
+      )
+    )
+    (symbol "TSP2116_1_1"
+      (pin input line (at -5.08 7.62 0) (length 2.54)
+        (name "GND" (effects (font (size 1.27 1.27))))
+        (number "1" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at -5.08 3.81 0) (length 2.54)
+        (name "VOUT" (effects (font (size 1.27 1.27))))
+        (number "2" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at -5.08 0 0) (length 2.54)
+        (name "VIN1" (effects (font (size 1.27 1.27))))
+        (number "3" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at -5.08 -3.81 0) (length 2.54)
+        (name "PR1" (effects (font (size 1.27 1.27))))
+        (number "4" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 12.7 7.62 180) (length 2.54)
+        (name "MODE" (effects (font (size 1.27 1.27))))
+        (number "5" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 12.7 3.81 180) (length 2.54)
+        (name "VIN2" (effects (font (size 1.27 1.27))))
+        (number "6" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at 12.7 0 180) (length 2.54)
+        (name "VOUT" (effects (font (size 1.27 1.27))))
+        (number "7" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at 12.7 -3.81 180) (length 2.54)
+        (name "ST" (effects (font (size 1.27 1.27))))
+        (number "8" (effects (font (size 1.27 1.27))))
+      )
+    )
+  )
+)
diff --git a/modules/Communication/comm.kicad_pro b/modules/Communication/comm.kicad_pro
index cf3f1c8..f445685 100644
--- a/modules/Communication/comm.kicad_pro
+++ b/modules/Communication/comm.kicad_pro
@@ -343,6 +343,10 @@
     [
       "81a5172c-b171-400d-8856-41d6e486bdd1",
       "MCU"
+    ],
+    [
+      "0335b19b-f69a-4698-b41d-d454ea335718",
+      "Battery switch"
     ]
   ],
   "text_variables": {}
diff --git a/modules/Communication/comm.kicad_sch b/modules/Communication/comm.kicad_sch
index f04a6bc..bcbaf46 100644
--- a/modules/Communication/comm.kicad_sch
+++ b/modules/Communication/comm.kicad_sch
@@ -7,15 +7,130 @@
   (lib_symbols
   )
 
+  (junction (at 116.205 62.23) (diameter 1.016) (color 0 0 0 0))
+  (junction (at 251.46 69.85) (diameter 1.016) (color 0 0 0 0))
+
+  (wire (pts (xy 116.205 43.18) (xy 116.205 62.23))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid c360cf0f-16e8-4a11-8b4e-d9225f3eb017)
+  )
+  (wire (pts (xy 116.205 62.23) (xy 116.205 99.06))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid c360cf0f-16e8-4a11-8b4e-d9225f3eb017)
+  )
+  (wire (pts (xy 116.205 62.23) (xy 125.73 62.23))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid 3ba201ae-f1a1-4d5a-909f-894815b63556)
+  )
+  (wire (pts (xy 116.205 99.06) (xy 127.635 99.06))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid c360cf0f-16e8-4a11-8b4e-d9225f3eb017)
+  )
+  (wire (pts (xy 176.53 43.18) (xy 116.205 43.18))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid c360cf0f-16e8-4a11-8b4e-d9225f3eb017)
+  )
+  (wire (pts (xy 176.53 56.515) (xy 176.53 43.18))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid c360cf0f-16e8-4a11-8b4e-d9225f3eb017)
+  )
+  (wire (pts (xy 179.705 56.515) (xy 176.53 56.515))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid c360cf0f-16e8-4a11-8b4e-d9225f3eb017)
+  )
+  (wire (pts (xy 209.55 57.785) (xy 230.505 57.785))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid 6127fa5b-bd42-46e2-893f-40557fadf666)
+  )
+  (wire (pts (xy 209.55 72.39) (xy 230.505 72.39))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid b3e0b959-4139-4fec-adef-745609e7b9db)
+  )
+  (wire (pts (xy 222.25 63.5) (xy 222.25 69.215))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid 7a8e26d3-e367-476d-8a1e-eed84c5b62d5)
+  )
+  (wire (pts (xy 222.25 69.215) (xy 209.55 69.215))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid 7a8e26d3-e367-476d-8a1e-eed84c5b62d5)
+  )
+  (wire (pts (xy 230.505 57.785) (xy 230.505 69.85))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid 6127fa5b-bd42-46e2-893f-40557fadf666)
+  )
+  (wire (pts (xy 230.505 69.85) (xy 251.46 69.85))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid 6127fa5b-bd42-46e2-893f-40557fadf666)
+  )
+  (wire (pts (xy 230.505 72.39) (xy 230.505 74.93))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid b3e0b959-4139-4fec-adef-745609e7b9db)
+  )
+  (wire (pts (xy 230.505 74.93) (xy 251.46 74.93))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid b3e0b959-4139-4fec-adef-745609e7b9db)
+  )
+  (wire (pts (xy 232.41 54.61) (xy 209.55 54.61))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid c566d666-4fa1-4465-9686-c252afadf3a0)
+  )
+  (wire (pts (xy 232.41 58.42) (xy 232.41 54.61))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid c566d666-4fa1-4465-9686-c252afadf3a0)
+  )
+  (wire (pts (xy 251.46 58.42) (xy 232.41 58.42))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid c566d666-4fa1-4465-9686-c252afadf3a0)
+  )
+  (wire (pts (xy 251.46 63.5) (xy 222.25 63.5))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid 7a8e26d3-e367-476d-8a1e-eed84c5b62d5)
+  )
+  (wire (pts (xy 251.46 69.85) (xy 252.095 69.85))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+    (uuid 6127fa5b-bd42-46e2-893f-40557fadf666)
+  )
+
+  (sheet (at 179.705 52.07) (size 29.845 22.225) (fields_autoplaced)
+    (stroke (width 0.1524) (type solid) (color 0 0 0 0))
+    (fill (color 0 0 0 0.0000))
+    (uuid 0335b19b-f69a-4698-b41d-d454ea335718)
+    (property "Název listu" "Battery switch" (id 0) (at 179.705 51.3584 0)
+      (effects (font (size 1.27 1.27)) (justify left bottom))
+    )
+    (property "Soubor listu" "battSwitch.kicad_sch" (id 1) (at 179.705 74.8796 0)
+      (effects (font (size 1.27 1.27)) (justify left top))
+    )
+    (pin "ESP#1_3V3" input (at 209.55 54.61 0)
+      (effects (font (size 1.27 1.27)) (justify right))
+      (uuid d9645b65-4068-4c22-8fdf-affa35634fc0)
+    )
+    (pin "ESP#2_CHARGE" input (at 209.55 72.39 0)
+      (effects (font (size 1.27 1.27)) (justify right))
+      (uuid f46edcda-da5c-4e5b-a4ce-baecdd6e42b0)
+    )
+    (pin "ESP#1_CHARGE" input (at 209.55 69.215 0)
+      (effects (font (size 1.27 1.27)) (justify right))
+      (uuid ba727413-47ff-4bf2-9e2a-2e8c5103bfd4)
+    )
+    (pin "+3V3 out" input (at 179.705 56.515 180)
+      (effects (font (size 1.27 1.27)) (justify left))
+      (uuid 638c389d-0668-4b9b-8289-6c4a5b6d6066)
+    )
+    (pin "ESP#2_3V3" input (at 209.55 57.785 0)
+      (effects (font (size 1.27 1.27)) (justify right))
+      (uuid 2202b3c6-3c7b-4288-b551-6752a27fbd0e)
+    )
+  )
 
   (sheet (at 127.635 93.345) (size 24.765 15.24) (fields_autoplaced)
     (stroke (width 0.1524) (type solid) (color 0 0 0 0))
     (fill (color 0 0 0 0.0000))
     (uuid 135894dc-6710-4561-8073-567533e9f424)
-    (property "Sheet name" "GPS Module" (id 0) (at 127.635 92.6334 0)
+    (property "Název listu" "GPS Module" (id 0) (at 127.635 92.6334 0)
       (effects (font (size 1.27 1.27)) (justify left bottom))
     )
-    (property "Sheet file" "gps_module.kicad_sch" (id 1) (at 127.635 109.1696 0)
+    (property "Soubor listu" "gps_module.kicad_sch" (id 1) (at 127.635 109.1696 0)
       (effects (font (size 1.27 1.27)) (justify left top))
     )
     (pin "3V3" input (at 127.635 99.06 180)
@@ -44,22 +159,22 @@
     (stroke (width 0.1524) (type solid) (color 0 0 0 0))
     (fill (color 0 0 0 0.0000))
     (uuid a345038c-0e2c-4410-9183-a80a047c8766)
-    (property "Sheet name" "HF Transmitter" (id 0) (at 125.73 126.9234 0)
+    (property "Název listu" "HF Transmitter" (id 0) (at 125.73 126.9234 0)
       (effects (font (size 1.27 1.27)) (justify left bottom))
     )
-    (property "Sheet file" "hf_transmitter.kicad_sch" (id 1) (at 125.73 144.0946 0)
+    (property "Soubor listu" "hf_transmitter.kicad_sch" (id 1) (at 125.73 144.0946 0)
       (effects (font (size 1.27 1.27)) (justify left top))
     )
   )
 
-  (sheet (at 166.37 83.82) (size 33.02 34.29) (fields_autoplaced)
+  (sheet (at 180.34 97.79) (size 33.02 34.29) (fields_autoplaced)
     (stroke (width 0.1524) (type solid) (color 0 0 0 0))
     (fill (color 0 0 0 0.0000))
     (uuid 81a5172c-b171-400d-8856-41d6e486bdd1)
-    (property "Sheet name" "MCU" (id 0) (at 166.37 83.1084 0)
+    (property "Název listu" "MCU" (id 0) (at 180.34 97.0784 0)
       (effects (font (size 1.27 1.27)) (justify left bottom))
     )
-    (property "Sheet file" "mcu_comm.kicad_sch" (id 1) (at 166.37 118.6946 0)
+    (property "Soubor listu" "mcu_comm.kicad_sch" (id 1) (at 180.34 132.6646 0)
       (effects (font (size 1.27 1.27)) (justify left top))
     )
   )
@@ -68,10 +183,10 @@
     (stroke (width 0.1524) (type solid) (color 0 0 0 0))
     (fill (color 0 0 0 0.0000))
     (uuid 829b2795-9702-4633-a078-e2998d6d9402)
-    (property "Sheet name" "OpenLST (Beacon)" (id 0) (at 125.73 52.6284 0)
+    (property "Název listu" "OpenLST (Beacon)" (id 0) (at 125.73 52.6284 0)
       (effects (font (size 1.27 1.27)) (justify left bottom))
     )
-    (property "Sheet file" "OpenLST.kicad_sch" (id 1) (at 125.73 77.4196 0)
+    (property "Soubor listu" "OpenLST.kicad_sch" (id 1) (at 125.73 77.4196 0)
       (effects (font (size 1.27 1.27)) (justify left top))
     )
     (pin "5V" input (at 125.73 66.675 180)
@@ -116,80 +231,88 @@
     )
   )
 
-  (sheet (at 228.6 75.565) (size 16.51 55.88) (fields_autoplaced)
+  (sheet (at 251.46 53.34) (size 16.51 55.88) (fields_autoplaced)
     (stroke (width 0.1524) (type solid) (color 0 0 0 0))
     (fill (color 0 0 0 0.0000))
     (uuid 3006f49f-d72b-4219-8dea-bda42cf88e84)
-    (property "Sheet name" "Stack Connector" (id 0) (at 228.6 74.8534 0)
+    (property "Název listu" "Stack Connector" (id 0) (at 251.46 52.6284 0)
       (effects (font (size 1.27 1.27)) (justify left bottom))
     )
-    (property "Sheet file" "Stack_connector.kicad_sch" (id 1) (at 228.6 132.0296 0)
+    (property "Soubor listu" "Stack_connector.kicad_sch" (id 1) (at 251.46 109.8046 0)
       (effects (font (size 1.27 1.27)) (justify left top))
     )
-    (pin "CAN_H" input (at 228.6 99.695 180)
+    (pin "CAN_H" input (at 251.46 81.28 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid 40b88aca-f462-4f2f-a0bf-d01ccc8111c5)
     )
-    (pin "RS_485_A" input (at 228.6 106.68 180)
+    (pin "RS_485_A" input (at 251.46 84.455 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid 300bdf4c-b7cf-4ea2-af04-063b3c8157a2)
     )
-    (pin "EPS#1_5V" input (at 228.6 78.74 180)
+    (pin "EPS#1_5V" input (at 251.46 55.88 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid deb0a69f-01cc-40ea-bfb5-d5abe6178447)
     )
-    (pin "EPS#1_3V3" input (at 228.6 81.28 180)
+    (pin "EPS#1_3V3" input (at 251.46 58.42 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid 8f350fe4-cfe6-45ee-8c29-71ccfca1b82b)
     )
-    (pin "EPS#1_1V8" input (at 228.6 83.82 180)
+    (pin "EPS#1_1V8" input (at 251.46 60.96 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid faa7de87-d22a-4ad8-9482-a0f4a8d6793d)
     )
-    (pin "CAN_L" input (at 228.6 97.155 180)
+    (pin "CAN_L" input (at 251.46 78.74 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid ad3344f8-871b-4951-ae39-e2ccb0cbb099)
     )
-    (pin "RS_485_~{B}" input (at 228.6 109.22 180)
+    (pin "RS_485_~{B}" input (at 251.46 86.995 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid 1e054749-d55d-4fa9-92e4-fedd8b3be27f)
     )
-    (pin "QSPI_D1" input (at 228.6 115.57 180)
+    (pin "QSPI_D1" input (at 251.46 93.345 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid aba7969b-cdb5-4ef0-ba0c-400112733e6c)
     )
-    (pin "QSPI_SCK" input (at 228.6 127 180)
+    (pin "QSPI_SCK" input (at 251.46 104.775 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid cc033afd-5e7c-454e-815a-d4ca057c4abf)
     )
-    (pin "EPS#2_3V3" input (at 228.6 90.805 180)
+    (pin "EPS#2_3V3" input (at 251.46 69.85 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid bc57d857-eb3c-4468-833f-449ae0fb617b)
     )
-    (pin "EPS#2_5V" input (at 228.6 88.265 180)
+    (pin "EPS#2_5V" input (at 251.46 67.31 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid ac8e3b83-abb2-46af-9c45-678c0ef8180d)
     )
-    (pin "QSPI_CS" input (at 228.6 129.54 180)
+    (pin "QSPI_CS" input (at 251.46 107.315 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid 80b1ce93-afff-4793-b748-45fd77f50d88)
     )
-    (pin "EPS#2_1V8" input (at 228.6 93.345 180)
+    (pin "EPS#2_1V8" input (at 251.46 72.39 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid a2142d81-09a8-408f-80e3-1bf7de4dfc15)
     )
-    (pin "QSPI_D2" input (at 228.6 118.11 180)
+    (pin "QSPI_D2" input (at 251.46 95.885 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid 8b2acdf9-30b1-4886-91b3-11589dafc045)
     )
-    (pin "QSPI_D3" input (at 228.6 120.65 180)
+    (pin "QSPI_D3" input (at 251.46 98.425 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid d8c6c93d-972d-4f67-985d-20054ce88555)
     )
-    (pin "QSPI_D4" input (at 228.6 123.19 180)
+    (pin "QSPI_D4" input (at 251.46 100.965 180)
       (effects (font (size 1.27 1.27)) (justify left))
       (uuid d447a6bb-2cf3-4940-94a7-326bb0cc98b0)
     )
+    (pin "ESP#2_CHARGE" input (at 251.46 74.93 180)
+      (effects (font (size 1.27 1.27)) (justify left))
+      (uuid 15d1c2b5-77c6-4122-a3d5-3b7ea6ebd290)
+    )
+    (pin "ESP#1_CHARGE" input (at 251.46 63.5 180)
+      (effects (font (size 1.27 1.27)) (justify left))
+      (uuid c2662652-3c8b-4086-b517-5fdea53f5242)
+    )
   )
 
   (sheet_instances
@@ -199,6 +322,7 @@
     (path "/135894dc-6710-4561-8073-567533e9f424" (page "4"))
     (path "/a345038c-0e2c-4410-9183-a80a047c8766" (page "5"))
     (path "/81a5172c-b171-400d-8856-41d6e486bdd1" (page "6"))
+    (path "/0335b19b-f69a-4698-b41d-d454ea335718" (page "7"))
   )
 
   (symbol_instances
@@ -382,6 +506,9 @@
     (path "/81a5172c-b171-400d-8856-41d6e486bdd1/4a039799-f170-4b8b-9904-82da89c16c1c"
       (reference "#PWR?") (unit 1) (value "GND") (footprint "")
     )
+    (path "/0335b19b-f69a-4698-b41d-d454ea335718/5edab2b6-9ffb-4ae1-b1f0-54ddc7ce5659"
+      (reference "#PWR?") (unit 1) (value "GND") (footprint "")
+    )
     (path "/81a5172c-b171-400d-8856-41d6e486bdd1/654d2648-5b73-46d2-b3a8-f89598775795"
       (reference "#PWR?") (unit 1) (value "GND") (footprint "")
     )
@@ -391,6 +518,9 @@
     (path "/81a5172c-b171-400d-8856-41d6e486bdd1/854d9771-d53c-47e5-9cb7-e940c58bc2ba"
       (reference "#PWR?") (unit 1) (value "GND") (footprint "")
     )
+    (path "/0335b19b-f69a-4698-b41d-d454ea335718/8f2e9cba-6539-40c4-8553-4b1e6f27056f"
+      (reference "#PWR?") (unit 1) (value "GND") (footprint "")
+    )
     (path "/81a5172c-b171-400d-8856-41d6e486bdd1/91cd8b7e-ad12-4411-bee1-ec36e8521bcf"
       (reference "#PWR?") (unit 1) (value "GND") (footprint "")
     )
@@ -640,9 +770,15 @@
     (path "/81a5172c-b171-400d-8856-41d6e486bdd1/9547ef01-077b-4438-a172-64c2125251f1"
       (reference "R?") (unit 1) (value "1M") (footprint "TCY_passives:R_0603_1608Metric")
     )
+    (path "/0335b19b-f69a-4698-b41d-d454ea335718/a9384195-1737-4983-9989-a78383bb8645"
+      (reference "R?") (unit 1) (value "330k") (footprint "")
+    )
     (path "/81a5172c-b171-400d-8856-41d6e486bdd1/eb6b642d-cd23-4c17-a594-aa495930eca6"
       (reference "R?") (unit 1) (value "100k") (footprint "TCY_passives:R_0603_1608Metric")
     )
+    (path "/0335b19b-f69a-4698-b41d-d454ea335718/fa1153a5-a5fa-4a23-beb6-5d04d6d9feea"
+      (reference "R?") (unit 1) (value "50k") (footprint "")
+    )
     (path "/81a5172c-b171-400d-8856-41d6e486bdd1/fa9e67a5-5f23-49fe-b2f2-a895fb5395c1"
       (reference "SW?") (unit 1) (value "RST_BTN") (footprint "TCY_buttons_switches:KMT031NGJLHS")
     )
@@ -676,12 +812,18 @@
     (path "/81a5172c-b171-400d-8856-41d6e486bdd1/087f685b-381e-416e-877f-21ddb167ba88"
       (reference "U?") (unit 1) (value "STM6822") (footprint "Package_TO_SOT_SMD:SOT-23-5")
     )
+    (path "/0335b19b-f69a-4698-b41d-d454ea335718/3ed63a54-f90b-486a-a926-491ab3eac668"
+      (reference "U?") (unit 1) (value "TVL3691") (footprint "")
+    )
     (path "/81a5172c-b171-400d-8856-41d6e486bdd1/5197f871-6b30-4ae1-9277-13230d2bc5be"
       (reference "U?") (unit 1) (value "STM32L432KCUx") (footprint "Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.45x3.45mm")
     )
     (path "/135894dc-6710-4561-8073-567533e9f424/a9077745-053e-4b42-8a30-760f9487663f"
       (reference "U?") (unit 1) (value "NEO-8Q") (footprint "RF_GPS:ublox_NEO")
     )
+    (path "/0335b19b-f69a-4698-b41d-d454ea335718/dfe84c23-724a-48a4-ab09-8dd0b9b44ba3"
+      (reference "U?") (unit 1) (value "TPS2116") (footprint "")
+    )
     (path "/81a5172c-b171-400d-8856-41d6e486bdd1/e9289751-ca4e-4aca-b320-8a1ce3eeef5a"
       (reference "U?") (unit 1) (value "STM6822") (footprint "Package_TO_SOT_SMD:SOT-23-5")
     )
diff --git a/modules/Communication/comm.kicad_sym b/modules/Communication/comm.kicad_sym
index d97c6b9..443c26f 100644
--- a/modules/Communication/comm.kicad_sym
+++ b/modules/Communication/comm.kicad_sym
@@ -116,4 +116,57 @@
       )
     )
   )
+  (symbol "comm:TPS2116" (in_bom yes) (on_board yes)
+    (property "Reference" "U" (id 0) (at 3.81 12.7 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Value" "TPS2116" (id 1) (at 3.81 -8.89 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Footprint" "" (id 2) (at 3.81 12.7 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 3.81 12.7 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (symbol "TPS2116_0_1"
+      (rectangle (start -2.54 11.43) (end 10.16 -6.35)
+        (stroke (width 0.1524)) (fill (type background))
+      )
+    )
+    (symbol "TPS2116_1_1"
+      (pin input line (at -5.08 7.62 0) (length 2.54)
+        (name "GND" (effects (font (size 1.27 1.27))))
+        (number "1" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at -5.08 3.81 0) (length 2.54)
+        (name "VOUT" (effects (font (size 1.27 1.27))))
+        (number "2" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at -5.08 0 0) (length 2.54)
+        (name "VIN1" (effects (font (size 1.27 1.27))))
+        (number "3" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at -5.08 -3.81 0) (length 2.54)
+        (name "PR1" (effects (font (size 1.27 1.27))))
+        (number "4" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 12.7 7.62 180) (length 2.54)
+        (name "MODE" (effects (font (size 1.27 1.27))))
+        (number "5" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 12.7 3.81 180) (length 2.54)
+        (name "VIN2" (effects (font (size 1.27 1.27))))
+        (number "6" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at 12.7 0 180) (length 2.54)
+        (name "VOUT" (effects (font (size 1.27 1.27))))
+        (number "7" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at 12.7 -3.81 180) (length 2.54)
+        (name "ST" (effects (font (size 1.27 1.27))))
+        (number "8" (effects (font (size 1.27 1.27))))
+      )
+    )
+  )
 )
diff --git a/modules/Communication/sym-lib-table b/modules/Communication/sym-lib-table
new file mode 100644
index 0000000..fede9fa
--- /dev/null
+++ b/modules/Communication/sym-lib-table
@@ -0,0 +1,3 @@
+(sym_lib_table
+  (lib (name "comm")(type "KiCad")(uri "${KIPRJMOD}/comm.kicad_sym")(options "")(descr ""))
+)