How To Add Telemetry (Temperature etc) Sensor To Lilygo T-Beam Meshtastic Node With BME280

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In this guide, you will add a telemetry sensor (BME280) module to an existing Lilygo T-Beam Meshtastic node and Measure atmospheric pressure, temperature, and humidity.


Now, let’s start preparing the necessary hardware.


There are two types of BME280 sensors: 5V and 3.3V.Choose 5V or 3.3V based on your system requirements

Although the hardware selection can be changed, we have chosen parts that are easily available. One thing to note here is that soldering is only required when soldering the headers to the Lilygo T-Beam and BME280 modules.. This work can be outsourced to your local electronics store, saving you money and hassle.


All hardware is ready and wiring is complete. For this, follow the following schematic.


Note that this assumes that the headers on the board are already soldered, so it will be important to connect the pins in the correct locations.

BME280 Telemetry Module – Heltec V3 Lora ESP32

BME280-5V for 5V module
BME280-3.3V for 3.3V module
  • VCC/VIN -> 5V (for BME280-5V) or 3.3V (for BMP280-3.3V)
  • SCL -> Pin 42
  • SDA -> Pin 41
  • GND -> GND


BME280-5V module may not work on battery, only works on USB


If you have screens connected to the same port, consider connecting the BME280 in parallel mode.


Capacitors are a good way to isolate one part of a circuit from another.


Note that the order of connections may vary. Please follow the specific component labels and IO ports and the provided schematic to ensure accurate wiring. Attention to these details will help ensure correct connections and avoid potential problems and component damage.

After all wiring is completed. Double-check your connections and make sure they match the recommended layout before proceeding to the next step.

Mesh static settings

  1. Open the Meshtastic app (IOS in this guide)
  2. Go to settings page
  3. In the module configuration section, go to Telemetry (Sensors).
  4. Scroll down to sensor options
  5. Toggle the switch “enabled” and other switches according to your preference

In conclusion, adding a Telemetry module to an existing Lilygo T-Beam Meshtastic Node is a simple process that enhances the functionality of the device. Selected hardware components, such as BME280 modules and header pins, provide a reliable and ready-to-use solution. Soldering may be required, but it is convenient because you can outsource it to an electronics store. By following this guide, users will be able to easily integrate her BME280 module into her Meshtastic node, expand its telemetry tracking capabilities, and enhance its overall functionality.

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