ESP32-CAM-MB Pinout
16 pins| Pin | GPIO | Labels | Status | Capabilities | Notes |
|---|---|---|---|---|---|
| 1 | - | 5V | power | - | |
| 2 | - | GND | ground | - | |
| 3 | 12 | A15T5PWM | strapping | adc · touch | |
| 4 | 13 | A14T4PWM | strapping | adc · touch | |
| 5 | 15 | A13T3PWM | strapping | adc · touch | |
| 6 | 14 | A16T6PWM | strapping | adc · touch | |
| 7 | 2 | A12T2PWM | strapping | adc · touch | |
| 8 | 4 | A10T0PWM | strapping | adc · touch | |
| 9 | - | 3V33.3V | power | - | |
| 10 | 16 | IO16 | strapping | - | |
| 11 | 0 | A11T1 | strapping | adc · touch | |
| 12 | - | GND | ground | - | |
| 13 | - | VCC | power | - | |
| 14 | 3 | RXPWM | uart | uart | |
| 15 | 1 | TXPWM | uart | uart | |
| 16 | - | GND | ground | - |
Fine - with a little care
10 pins · 10 things to knowA15GPIO12 Bootstrapping pin; JTAG TDI; sets flash voltage (VDD_SDIO); also HSPIQ (flash data line). Strapping
Keep LOW during boot (internal PD); pulling HIGH at reset selects 1.8V flash mode, causing flash brownout if 3.3V flash is used.
A14GPIO13 JTAG clock pin (TCK); also ADC2 channel 4 / Touch4 input. JTAG
Used for JTAG debugging (TCK); avoid using as GPIO if JTAG is needed.
A13GPIO15 Bootstrapping pin; JTAG TDO; controls UART0 boot log output; also HSPICS0 (secondary SPI CS). Strapping
Keep HIGH during boot (internal PU); if LOW on reset, bootloader log is silenced and boot mode may change.
A16GPIO14 JTAG mode select pin (TMS); also HSPI CLK and PWM-capable GPIO. JTAG
Used for JTAG debugging (TMS); driving it as GPIO may interfere with JTAG or produce spurious signals at boot.
A12GPIO2 Bootstrapping pin (must be low or floating at reset); internal pull-down. Strapping
If driven HIGH on reset (while IO0 is LOW), selects an unsupported SDIO boot mode, causing boot failure.
A10GPIO4 Bootstrapping pin; internal pull-down; also HSPIHD (flash data line) on modules with internal flash. Strapping
Sampled at reset for boot config; should not be driven at boot (affects boot mode timing).
IO16 PSRAM CS# on WROVER-class modules and on ESP32-D0WDRH2-V3; in-package flash CS# on ESP32-U4WDH. Also UART2 RX. PSRAM
Wired to the memory die on PSRAM-equipped modules (WROVER, PICO-V3-02) and on in-package-memory chip variants (U4WDH, D0WDRH2-V3); an ordinary GPIO on a plain WROOM-32.
A11GPIO0 Bootstrapping pin (enter bootloader when low); internal pull-up. Strapping
Must be HIGH during boot for normal startup; if held LOW on reset, forces flash programming mode.
RXGPIO3 Default UART0 RX pin for USB-serial programming (console input). UART
Used for receiving data from USB-UART (programming); also pulled HIGH at boot for console communication, so using as GPIO can disrupt uploads.
TXGPIO1 Default UART0 TX pin for USB-serial programming and console. UART
Connected to on-board USB-UART for uploading and logs; drives serial output at boot, so using as GPIO can disrupt programming or console.
The ESP32-CAM-MB pinout brings out 16 pins - 10 usable GPIO alongside the 5V, GND, 3V3 and VCC power rails.
For peripherals, TX/RX on GPIO1 and GPIO3 cover serial logging and flashing.
On the analog side there are 7 ADC-capable pins for sensors and battery monitoring and 7 capacitive-touch inputs.
10 of the exposed pins carry boot-time or system duties on the ESP32 (A15, A14, A13 and 7 more).
Getting started
flash your first firmware in ~2 minutesBoard: ESP32 Dev Module Flash Size: Upload Speed: 921600
// toggle GPIO8 - wire an LED and resistor to it
void setup() {
pinMode(8, OUTPUT);
}
void loop() {
digitalWrite(8, HIGH); delay(500);
digitalWrite(8, LOW); delay(500);
}[env:esp32cam-mb]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200
upload_speed = 921600esp32dev - or type it after board =.esp32:
board: esp32dev
variant: esp32
framework:
type: esp-idf
# blink - GPIO8
output:
- platform: gpio
pin: 8
id: led_out
light:
- platform: binary
name: "LED"
output: led_outesp32dev (same ids as PlatformIO).esptool.py --chip esp32 --port /dev/ttyACM0 \
--baud 921600 write_flash 0x1000 firmware.bin--port = your /dev/tty* (macOS/Linux) or COMx (Windows).Specifications
ESP32 · 40.5 × 27 mm · vs other ESP32 chips →Dimensions
About this board
At its core is the ESP32 - a dual-core Xtensa with both Bluetooth Classic and BLE.
Only 10 GPIO are broken out, where most ESP32 boards manage about 24 - worth checking the pinout covers what you need.
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