---
id: peripherals
title: Heltec Sensor Peripherals
sidebar_label: Peripherals
sidebar_position: 3
---

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## Capsule Sensor V3

### Introduction
Strong extensibility is an important feature of Capsule Sensor V3. By replacing the sensor module at the bottom of the device, the device can be flexibly used in various occasions.

:::warning
Different sensors may require different firmware versions, and the current version is based on the GNSS version. We will update the other firmware as soon as possible.
:::

### Heltec sensor type
:::info
Each Capsule Sensor V3 comes with a sensor module by default when you buy it, you just need to choose it at the time of purchase. You can also purchase other sensors which is Capsule Sensor V3   from Heltec, and we will continue to expand the variety of these sensors.
:::
  - GNSS: [Quectel_L76K_V1](https://resource.heltec.cn/download/Heltec%20Capsule%20Sensor%20V3/Quectel_L76K_V1.1-1.pdf)
  - Temperature&Humidity: [GXHTC3_EN_V2.4](https://heltec.org/project/temp-humi-sensor/)
  - 3-Axis: [DA217](https://heltec.org/project/3-axis-acceleration-sensor/)
  - Atmospheric pressure sensor: [BMP280](https://heltec.org/project/atmospheric-pressure-sensor/)

### Sensor module replacement step
![Capsule Sensor V3 Button](</img/hardware/heltec/capsule-sensor-extensibility.webp>)
 1. Shutdown of device.
 2. Remove the bottom screw of the device and remove the back cover.
 3. Gently remove the old module.
 4. Plug in the new sensors.
 5. Close the cap and return the screw. If the firmware is not compatible, download a new one.
:::warning
Be careful not to screw too hard, otherwise it will damage the plastic structure. Also note the direction of the charging interface.
:::

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