esp32_sensor_module/ESP32_Pinout.txt at main · Carputer-project/esp32_sensor_module · GitHub

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ESP-32 Pinout Reference (WiFi+BT SoC, ISM2.4G 802.11 b/g/n)
=============================================================

LEFT SIDE (Top to Bottom)
--------------------------
GPIO36  - SENSOR_VP  / AD1_0          (input only)
GPIO39  - SENSOR_VN  / AD1_3          (input only)
GPIO34  - A6                          (input only)
GPIO35  - A7                          (input only)
GPIO32  - A4
GPIO33  - A5
GPIO25  - A8  / DAC1 / AD2_8
GPIO26  - A9  / DAC2 / AD2_9
GPIO27  - T7  / AD2_7
GPIO14  - T6  / AD2_6 / SD_CLK
GPIO12  - T5  / AD2_5 / SD_D2
GPIO13  - T4  / AD2_4 / SD_D3
GND
VIN     - 5V input

RIGHT SIDE (Top to Bottom)
---------------------------
GPIO23  - D23
GPIO22  - D22
GPIO01  - TXO / TX0
GPIO03  - RXO / RX0
GPIO21  - D21
GPIO19  - D19
GPIO18  - D18
GPIO05  - D5
GPIO17  - TX2
GPIO16  - RX2
GPIO04  - D4  / T0  / AD2_0 / SD_D1
GPIO02  - D2  / T2  / AD2_2 / SD_D0
GPIO15  - D15 / T3  / AD2_3 / SD_CMD
GND
3.3V    - 3.3V output

TOP PINS
--------
EN      - Enable (reset)
VP      - SENSOR_VP / GPIO36
VN      - SENSOR_VN / GPIO39

BOTTOM BUTTONS
--------------
EN      - Enable / Reset button
BOOT    - Boot mode button

POWER
-----
VIN     - 5V input
3.3V    - 3.3V output
GND     - Ground

ADC CHANNELS
-------------
ADC1 (safe to use with WiFi):
  AD1_0  - GPIO36 (SENSOR_VP)
  AD1_3  - GPIO39 (SENSOR_VN)
  A6     - GPIO34
  A7     - GPIO35
  A4     - GPIO32
  A5     - GPIO33

ADC2 (conflicts with WiFi when active):
  A8  / AD2_8  - GPIO25
  A9  / AD2_9  - GPIO26
  T7  / AD2_7  - GPIO27
  T6  / AD2_6  - GPIO14
  T5  / AD2_5  - GPIO12
  T4  / AD2_4  - GPIO13
  T0  / AD2_0  - GPIO04
  T2  / AD2_2  - GPIO02
  T3  / AD2_3  - GPIO15

DAC OUTPUT
----------
DAC1  - GPIO25
DAC2  - GPIO26

TOUCH PINS
----------
T0  - GPIO04
T2  - GPIO02
T3  - GPIO15
T4  - GPIO13
T5  - GPIO12
T6  - GPIO14
T7  - GPIO27

UART
----
UART0  - TX0=GPIO01, RX0=GPIO03  (USB/debug serial)
UART2  - TX2=GPIO17, RX2=GPIO16

SD CARD
-------
SD_CLK  - GPIO14
SD_D2   - GPIO12
SD_D3   - GPIO13
SD_D1   - GPIO04
SD_D0   - GPIO02
SD_CMD  - GPIO15

NOTES
-----
- GPIO34, 35, 36, 39 are INPUT ONLY — no output, no internal pull-up/down
- ADC2 pins cannot be used when WiFi is active
- GPIO0 and GPIO2 affect boot mode — use with care
- GPIO01 and GPIO03 are USB serial — avoid for other use while programming
- EN button resets the board
- BOOT button held on reset = flash mode