CRSF & IBus Protocol Decoder Using ESP32

directory/
├── src/
│   ├── read-elrs-esp32.cpp
│   └── read-ibus-esp32.cpp
├── example/
│   ├── elrs-control-servo-motordc.cpp
│   └── ibus-control-esc-motorbrushless.cpp
└── README.md

Notes

• src/ → base/core source code
• example/ → finished example code

Hardware

Protocol	Reciever Type	Description
CRSF	ExpressLRS	an open-source RC link protocol that uses LoRa modulation for high update rates (up to 1000Hz), ultra-low latency (~3ms), and long-range communication over 2.4GHz or 900MHz frequencies.
IBus	Flysky FS-IA6B	a digital serial communication protocol developed by FlySky for RC receivers, transmitting up to 18 channels of control data at 115200 baud with low latency over a single bi-directional UART line

---

Wiring Diagram

flowchart LR
  subgraph Wiring Standalone ELRS
    ESP32[ESP32]
    ELRS[ELRS]
  end

  ELRS <-- GND --> ESP32
  ELRS <-- 5V --> ESP32
  ELRS <-- TX GPIO --> ESP32

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flowchart LR
  subgraph Wiring ELRS with FC
    ESP32[ESP32]
    ELRS[ELRS]
    FC[FC]
  end

  ELRS <-- GND --> ESP32
  ELRS <-- TX GPIO --> ESP32
  ELRS <-- TX RX --> FC
  ELRS <-- 5V --> FC
  ELRS <-- GND --> FC

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Similiar wiring for IBus Reciever (e.g Flysky), change the RX to IBus pin for IBus reciever

generated by: Oki Aryawan