Universal Multi-Module Controller

This project aims to allow standard input devices (such as game controllers and keyboards) to control output to 4-in-one multi-module transmitters.

Created by Patrick Leiser and Josh Adriano.

Installation

Use the Arduino-Pico board core by Earle Philhower Dependencies: U8g2 by oliver ArduinoJson by Benoit Blanchon Bounce2 by Thomas O Fredericks Pico PIO USB by Sekigon-gonnoc

You can program it with the Arduino IDE directly, adjust the menu options as described at the top of GamesteerRC.ino.

Alternatively, for advanced usage and debugging, you can install the Arduino-CLI and use the scripts as described below:

Build & Debug Scripts

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build.sh

Builds a release version of the firmware using Arduino CLI.

• Optimized for performance (-O2 / -Os)
• Produces .elf and .uf2 in build/
• Use when you want final or production-like firmware

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debug-build.sh

Builds a debug version of the firmware.

• Uses -Og optimization for good debugging behavior
• Includes full debug symbols (-g)
• Outputs to build-debug/
• Use when stepping through code or inspecting variables with GDB

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flash.sh

Flashes firmware using the Raspberry Pi Debug Probe (OpenOCD + SWD).

• Programs the .elf directly to flash
• Verifies and resets the device
• Use for fast iteration during debugging

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openocd.sh

Starts the OpenOCD GDB server.

• Provides a debugging connection on port 3333
• Required before connecting GDB
• Use when preparing a debug session

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gdb.sh

Launches GDB for source-level debugging.

• Connects to OpenOCD (localhost:3333)
• Uses the project .elf
• Use for breakpoints, stepping, and inspecting state
• See debugging section below for additional details

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upload.sh

Flashes firmware using the UF2 bootloader (USB mode).

• uses arduino-cli upload
• Before use, edit upload.sh with the port of your target device, such as /dev/cu.usbmodem101 or COM7
  • Alternatively, you can manually boot the device into BOOTSEL mode, and copy build/GamesteerRC.ino.uf2 onto the device.
• No debugger needed
• Use for simple deployment or recovery

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Typical usage

Call the scripts from the top level of the directory, such as ./scripts/build.sh

• Development (debugging): debug-build.sh → flash.sh → openocd.sh → (in a second terminal session) gdb.sh
• Quick standalone flash: build.sh → upload.sh

Debugging

For debugging, once OpenOCD and GDB are active, within GDB run

target extended-remote :3333
monitor reset halt
break panic
continue