ODROID ESP32
Hardkernel ODROID-GO - an ESP32-WROVER handheld game kit with a 2.4" LCD, speaker, D-pad, buttons and a built-in battery.
ODROID ESP32 Pinout
13 pins
| Pin | GPIO | Labels | Status | Capabilities | Notes |
|---|---|---|---|---|---|
| 1 | 1 | TXPWM | uart | uart | |
| 2 | 2 | LED_BUILTINPWM | strapping | - | |
| 3 | 3 | RXPWM | uart | uart | |
| 4 | 4 | SCLPWM | safe | i2c | |
| 5 | 15 | SDAPWM | strapping | i2c | |
| 6 | 18 | SCKPWM | safe | spi | |
| 7 | 19 | MISOPWM | safe | spi | |
| 8 | 22 | SSPWM | safe | spi | |
| 9 | 23 | MOSIPWM | safe | spi | |
| 10 | 25 | DAC1PWM | safe | dac | |
| 11 | 26 | DAC2PWM | safe | dac | |
| 12 | 35 | ADC1 | strapping | - | |
| 13 | 36 | ADC2 | strapping | - |
Start with these
7 pins with no boot or system involvementFreely assignable - no strapping, flash, USB or JTAG duties. Ideal first picks for buttons, sensors and LEDs.
Fine - with a little care
6 pins · 6 things to knowTXGPIO1 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.
LED_BUILTINGPIO2 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.
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.
SDAGPIO15 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.
ADC1GPIO35 Input-only GPIO (no output driver); ADC1 channel 7. Other
Cannot be used as output; only suitable for input.
ADC2GPIO36 Input-only GPIO (no output); ADC1 channel 0, Hall sensor VP. Other
Cannot be used as output; only suitable for input (e.g., analog read).
All 13 pins on the ODROID ESP32 are usable GPIO.
Peripheral wiring is straightforward: I²C is mapped to SDA on GPIO15 and SCL on GPIO4; the SPI bus (MOSI, MISO, SCK, SS) is broken out in full; TX/RX on GPIO1 and GPIO3 cover serial logging and flashing.
Beyond plain digital I/O you get 2 true DAC outputs.
6 of the exposed pins carry boot-time or system duties on the ESP32 (TX, LED_BUILTIN, RX and 3 more) - check the guidance above before wiring anything to them. SCL, SCK, MISO, SS and 3 more are free of any such role - the safest first picks.
Getting started
flash your first firmware in ~2 minutesBoard: ESP32 Wrover Module Flash Size: 16MB (128Mb) Flash Mode: DIO PSRAM: QSPI PSRAM Partition Scheme: 16M Flash (3MB APP/9.9MB FATFS) Upload Speed: 921600
// toggle GPIO4 - wire an LED and resistor to it
void setup() {
pinMode(4, OUTPUT);
}
void loop() {
digitalWrite(4, HIGH); delay(500);
digitalWrite(4, LOW); delay(500);
}[env:odroid_esp32]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200
upload_speed = 921600
board_build.arduino.memory_type = qio_qspi
build_flags = -DBOARD_HAS_PSRAMesp32dev - or type it after board =.esp32:
board: esp32dev
variant: esp32
framework:
type: esp-idf
psram:
mode: quad
speed: 80MHz
# blink - GPIO4
output:
- platform: gpio
pin: 4
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 · 121 × 76 mm · vs other ESP32 chips →Dimensions
About this board
Inside sits the ESP32 - a dual-core Xtensa with both Bluetooth Classic and BLE.
At $32.00 it's on the expensive side for an ESP32 board - most land around $20.
Only 13 GPIO are left for your own hardware - the display and onboard peripherals claim the rest.
Around the module: 4MB (QSPI) PSRAM, a TFT 2.4" 320x240 display, a microSD slot, a speaker (0.5W 8Ω), an amplifier, battery charging and D-Pad/A/B/Start/Select/Menu/Volume buttons.
- 3.7V 1200mAh Li-Po battery (~10h play time)
- 2.4" 320x240 SPI TFT LCD (ILI9341)
- 0.5W 8Ω mono speaker with onboard amplifier
- 10-pin expansion header (I2C, GPIO, IRQ at 3.3V)
Where to buy
prices are typical street pricesResources
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