Description

M5StickC Plus2 remote control for DJI Osmo Action 5 Pro cameras.

Switch modes, start/stop recording, capture photo, sleep, wake, automatic reconnection, and GPIO control.

GPS not supported in this version!

More info here: https://serialhobbyism.com/open-source-diy-remote-for-dji-osmo-action-5-pro-cameras

Demo on YouTube: https://youtube.com/shorts/t92D7x2sBuA?feature=share

Hardware Specifications

The M5StickC Plus2 features:

• MCU: ESP32-PICO-V3-02 (Dual-core ESP32, 240MHz)
• Display: 1.14" TFT LCD (135x240 pixels, ST7789V2 driver)
• Flash: 4MB
• PSRAM: None
• Buttons: 3 (Button A/Home, Button B/Side, Power)
• IMU: MPU6886 (6-axis)
• RTC: BM8563
• PMU: AXP192
• Buzzer: Built-in
• IR Transmitter: Built-in
• LED: Internal red LED
• Grove Port: For external GPS module connection

Pin Mappings

Display (ST7789V2)

• MOSI: GPIO 15
• SCLK: GPIO 13
• CS: GPIO 5
• DC: GPIO 14
• RST: GPIO 12
• Backlight: GPIO 27

Buttons

• Button A (Home): GPIO 37
• Button B (Side): GPIO 39
• Power Button: GPIO 35

I2C (IMU, RTC, PMU)

• SDA: GPIO 21
• SCL: GPIO 22

Grove Port (UART for GPS)

• TX: GPIO 32
• RX: GPIO 33

Other

• Internal LED: GPIO 19
• Buzzer: GPIO 2
• IR: GPIO 9
• Power Enable: GPIO 2

Building the Project

Prerequisites

1. Install ESP-IDF v5.0 or later
2. Set up the ESP-IDF environment:

   . $HOME/esp/esp-idf/export.sh

   Or on Windows:

   %IDF_PATH%\export.bat

Build Steps

IMPORTANT: Set the correct target first!

1. Clean any previous build:

   idf.py fullclean

2. CRITICAL: Set target to ESP32 for M5StickC Plus2:

   idf.py set-target esp32

   Note: M5StickC Plus2 uses ESP32-PICO-V3-02, which is a standard ESP32 chip.

3. Copy the M5StickC Plus2 specific configuration:

   cp sdkconfig.defaults.m5stickc_plus2 sdkconfig.defaults

   Or on Windows:

   copy sdkconfig.defaults.m5stickc_plus2 sdkconfig.defaults

4. Configure the project (optional):

   idf.py menuconfig

5. Build the project:

   idf.py build

6. Flash to M5StickC Plus2:

   idf.py -p COM[X] flash monitor

   Replace COM[X] with your device's serial port (e.g., COM3 on Windows, /dev/ttyUSB0 on Linux)

Features

Display

The M5StickC Plus2's display shows:

• Boot status and initialization progress
• BLE connection status
• GPS status
• Camera connection status

Button Functions

• Button A (GPIO 37): Main control button - single press for commands, long press for reconnection
• Button B (GPIO 39): Status display and secondary functions
• Power Button (GPIO 35): Power management

LED Indicators

The internal LED (GPIO 19) provides visual feedback:

• Different colors/patterns indicate various states
• Controlled via the light_logic module

Troubleshooting

Display Issues

• Ensure the display driver (ST7789) is properly initialized
• Check backlight GPIO (27) is set high
• Verify SPI pins are correctly configured

Button Not Responding

• M5StickC Plus2 buttons are active low (pressed = 0)
• Internal pull-ups are enabled
• Check GPIO 37 (Button A), GPIO 39 (Button B), GPIO 35 (Power)

Build Errors

• Ensure ESP-IDF v5.0+ is installed
• Target must be set to esp32s3
• Clean build directory if switching from another target

Power Management

The M5StickC Plus2 includes an AXP192 power management IC:

• I2C address: 0x34
• Controls battery charging, power rails, and system power
• Power enable pin: GPIO 2

Additional Resources

• M5StickC Plus2 Documentation
• ESP32-S3 Technical Reference
• ESP-IDF Programming Guide