RC Telemetry Bridge

Use an ESP32 to consume telemetry from your radio and send it over various transports.

Supports the following telemetry protocols:

• FrSky Smart port,
• TBS Crossfire CRSF,
• ImmersionRC Ghost,
• or pass-thru any byte stream!

Input:

• Smart port UART from FrSky compatible radio to ESP32 UART2.
• Smart port UART from FrSky R9M to ESP32 UART2.
• Telemetry over Bluetooth (BLE), e.g. X9D+ SE.
• Byte stream from a server socket.
• ESP-NOW.

Output:

• USB (compatible with Android telemetry apps).
• Bluetooth Serial (compatible with Android telemetry apps).
• BLE (compatible with Android telemetry apps).
• WiFi (AP and/or station)
  • built-in telemetry dashboard webapp with map,
  • JSON REST API,
  • WebSockets,
  • MQTT (e.g. IoT).
• Byte stream from a server socket.
• ESP-NOW.

Hardware

Minimum:

• ESP32 development board.

Optional:

• 5 LEDs.

Software dependencies

• MQTT
• NimBLE-Arduino
• AsyncTCP
• ESPAsyncWebServer

Install

1. Install Arduino IDE (version 1.8 or higher required).
2. Run install_libs.cmd/install_libs.sh to install ESP32 tools and library dependencies.
3. Open telemetry/telemetry.ino in Arduino IDE.
4. Select your hardware (e.g. ESP32 Dev Module) under 'Tools' -> 'Board: ...' -> 'ESP32 Arduino'.
5. Change 'Tools' -> 'Partition Scheme' to 'No OTA (2MB APP/2MB SPIFFS)'.
6. Connect your ESP32 board.
7. Change 'Tools' -> 'Port' to the port the ESP32 board is connected to.
8. Run 'Tools' -> 'ESP32 Sketch Data Upload'.
9. Hit the upload button.

Instructions

The ESP32 should start in WiFi access point mode. Point a browser at it, click on the 'Settings' link at the bottom of the page, and adjust the configuration appropriately. Then, reboot.

Touch pin control

Pin 13 - Toggle WiFi station mode.

Pin 14 - Toggle WiFi access point mode.

Pin 15 - Toggle BLE advertisement.