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.
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 | strapping | 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
6 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
sampled at boot or shared with debug/serial| Pin | Label | What to know | Role |
|---|---|---|---|
| LED_BUILTIN | GPIO2 | If driven HIGH on reset (while IO0 is LOW), selects an unsupported SDIO boot mode, causing boot failure. | Strapping |
| SCL | GPIO4 | Sampled at reset for boot config; should not be driven at boot (affects boot mode timing). | Strapping |
| SDA | MTDO (GPIO15) | Keep HIGH during boot (internal PU); if LOW on reset, bootloader log is silenced and boot mode may change. | Strapping |
| ADC1 | GPIO35 | Cannot be used as output; only suitable for input. | Other |
| ADC2 | GPIO36 (SENSOR_VP) | Cannot be used as output; only suitable for input (e.g., analog read). | Other |
Only if you know the tricks
wired to flash or USB - expect a fight| Pin | Label | What to know | Role |
|---|---|---|---|
| TX | U0TXD (GPIO1) | Connected to on-board USB-UART for uploading and logs; drives serial output at boot, so using as GPIO can disrupt programming or console. | USB |
| RX | U0RXD (GPIO3) | Used for receiving data from USB-UART (programming); also pulled HIGH at boot for console communication, so using as GPIO can disrupt uploads. | USB |
Pinout notes 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 ,…
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.
5 of the exposed pins carry boot-time or system duties on the ESP32 (LED_BUILTIN, SCL, SDA and 2 more) - check the guidance above before wiring anything to them. SCK, MISO, SS, MOSI and 2 more are free of any such role - the safest first picks.
Getting started
flash your first firmware in ~2 minutesBoard: Odroid Esp32
Flash Size: 16MB · DIO
Upload Speed: 921600
// blink
pinMode(18, OUTPUT);
digitalWrite(18, LOW); // on (often inverted)[env:odroid_esp32]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200
upload_speed = 921600esp32:
board: esp32dev
variant: odroid_esp32
framework:
type: esp-idf
# blink - GPIO18
output:
- platform: gpio
pin: 18
id: led_out
light:
- platform: binary
name: "LED"
output: led_outesptool.py --chip esp32 --port /dev/ttyACM0 \
write_flash 0x0 firmware.binSpecifications
ESP32 · 121 × 76 mmAbout 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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