meshtastic/docs/software/plugins/environment.md

---
id: environment-plugin
title: Environment measurement
sidebar_label: Environment measurement
---
## About

The Environment Measurement Plugin will allow nodes to send a specific message with information from connected environmental sensors. Currently supported sensors are BME280, BME680, DHT11, DHT12, DHT21, DHT22 and Dallas 1-wire DS18B20.

The preferred setup is using I2C, so the `environmental_measurement_plugin_sensor_pin` may not be needed.

## Configuration

These are the settings that can be configured.

    environmental_measurement_plugin_enabled
        Is the plugin enabled?

        0 = Disabled (Default)
        1 = Enabled

    environmental_measurement_plugin_screen_enabled
        Show received sensor readings on device screen.

        0 = Disabled (Default)
        1 = Enabled

    environmental_measurement_plugin_read_error_count_threshold
        Error count threshold for failed sensor readings.

        Default = 0

    preferences.environmental_measurement_plugin_update_interval
        How often (in seconds) should sensor readings be broadcasted?

        Default = 0

    environmental_measurement_plugin_recovery_interval
        For how long should we wait (in seconds) before trying to read sensors again upon exceeded error threshold?

        Default = 0

    environmental_measurement_plugin_display_fahrenheit
        Should temperature readings be converted to fahrenheit?

        0 = Disabled (Default)
        1 = Enabled

    environmental_measurement_plugin_sensor_type
        What sensor is connected?

        0 = DHT11 (Default)
        1 = Dallas 1-wire DS18B20
        2 = DHT12
        3 = DHT21
        4 = DHT22
        5 = BME280
        6 = BME680

    environmental_measurement_plugin_sensor_pin
        Which pin is the sensor connected to?

        Default = 0


## Usage Notes

For basic usage, start with:

	environmental_measurement_plugin_enabled = 1

	environmental_measurement_plugin_screen_enabled = 1

Depending on which pin your sensor is connected to, set it accordingly:

	environmental_measurement_plugin_sensor_pin = 13


:::note
The device must be restarted after the settings have been changed for the plugin to take effect.
:::


## Hardware

The sensors can be wired differently, here's one example for sensor DS18B20 https://randomnerdtutorials.com/esp32-ds18b20-temperature-arduino-ide


## Known Problems

* No default configuration values are currently set, so this must be done when enabling the plugin.