https://github.com/bushlanovdev/ble-telemetry-lite
✈️🎮📲 Crossfire and ELRS telemetry bridge from radio transmitter via BLE and WebSocket
https://github.com/bushlanovdev/ble-telemetry-lite
ble crsf elrs esp32-c3 esp32-s3 fpv telemetry websocket
Last synced: 6 days ago
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✈️🎮📲 Crossfire and ELRS telemetry bridge from radio transmitter via BLE and WebSocket
- Host: GitHub
- URL: https://github.com/bushlanovdev/ble-telemetry-lite
- Owner: BushlanovDev
- License: mit
- Created: 2025-02-15T13:42:22.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2025-11-29T14:08:44.000Z (7 months ago)
- Last Synced: 2025-12-01T16:34:56.879Z (7 months ago)
- Topics: ble, crsf, elrs, esp32-c3, esp32-s3, fpv, telemetry, websocket
- Language: C
- Homepage: https://gitflic.ru/project/skydevices/ble-telemetry-lite
- Size: 1.72 MB
- Stars: 7
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# BLE Telemetry Lite
[English](./README.md) | [Russian](./README_RU.md)
Firmware for **ESP32-C3**, **ESP32-S3**, and similar microcontrollers, enabling telemetry broadcast from Crossfire and ELRS radio systems over Bluetooth or Wi-Fi.
## Features
* Transmits Crossfire/ELRS telemetry from RC transmitters to phones, tablets, or laptops via Bluetooth or Wi-Fi
* Compatible with transmitters using Aux-serial output as well as direct connection to internal modules (e.g. Jumper RC up to T15)
* Telemetry display supported via [TelemetryViewer](https://github.com/RomanLut/android-taranis-smartport-telemetry/releases), [WebTelemetry](http://telemetry.skydevices.ru), or the built-in web interface
## Hardware
Development boards **ESP32-C3-SuperMini** (recommended) or **ESP32-S3-SuperMini**.
Other ESP32-based boards with BLE and Wi-Fi support may also work, but compatibility is untested and not guaranteed.
These boards are compact, affordable, and free from unnecessary components.
If using a different **ESP32-C3** or **ESP32-S3** board, note that pin numbering may differ from the microcontroller's internal pin numbers.
Refer to your board’s datasheet to identify correct pin mappings.
## Wiring
The module connects to the transmitter’s SerialAUX interface using 4 wires:
* 5V
* GND
* TX → to pin 3 (module RX)
* RX → to pin 4 (module TX) (optional)
Wiring to a RadioMaster Pocket transmitter example
If the transmitter lacks SerialAUX, connect the ELRS/Crossfire internal module’s TX pin directly to the module’s RX (pin 3).
Connection to internal TX on a Jumper T20 transmitter example
## Flashing and Configuration
### Firmware via web interface
Switch between BLE and Wi-Fi modes by pressing the **Boot** button on the module.
In Wi-Fi mode, connect to the **BLE Telemetry Lite** access point using the password: **12345678**.
The web interface is accessible at [http://192.168.4.1](http://192.168.4.1).
### Firmware via Flash Download Tool
Download [Flash Download Tool](https://docs.espressif.com/projects/esp-test-tools/en/latest/esp32c3/production_stage/tools/flash_download_tool.html), set the settings as shown in the screenshot and don't forget to specify your COM port.
## License
This repository's source code is available under the [MIT License](LICENSE).