meshtastic/docs/software/plugins/environment.md
2022-02-08 11:58:46 -07:00

7.5 KiB

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environment-plugin Environment measurement 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, Dallas 1-wire DS18B20, and MCP9808.

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
    7 = MCP9808

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

Example of T-LoraV1 with DHT22 temperature sensor

Setup of a T-LoraV1 with DHT22 temperature sensor.

<img src="T-LoraV1 with DHT22" src="/img/hardware/lora_v1_with_DHT22.jpg" style={{zoom:'25%'}} />

Requirements:

  • T-LoraV1 (but any esp32 should work, just be sure to double check which GPIO to use)
  • DHT22 sensor
  • 10 Kohm resistor (optional, but recommended)
  • breadboard (optional)
  • two red wires (could be a different color, but 5V is typically red)
  • two yellow wires for GPIO (could be a different color)
  • one black wire (could be a different color, but GROUND is typically black)

Steps:

  • disconnect power/battery
  • connect black wire from GROUND to "-" on the DHT22
  • connect yellow wire from middle PIN to a row on bread board
  • connect red wire from 5V to a row on breadboard
  • connect resistor between red and yellow rows
  • connect red wire from row with red to "+" on DHT22
  • connect yellow wire from yellow row to GPIO on device (ex: GPIO21)
  • double check the cabling (if you get it wrong, you can damage the device and/or the DHT22 sensor)
  • plug in device
  • configure the device:
meshtastic --set environmental_measurement_plugin_measurement_enabled true --set environmental_measurement_plugin_screen_enabled true --set environmental_measurement_plugin_update_interval 15 --set environmental_measurement_plugin_display_farenheit true --set environmental_measurement_plugin_sensor_type DHT22 --set environmental_measurement_plugin_sensor_pin 21

:::tip You can change the values above to suit your needs. The commands can be run one at a time or in a group as show above. :::

  • reboot/reset the device (press the RST button or unplug/plug in the device)
  • when the device boots it should say "Environment" and it may show the sensor data
  • if "no data", then triple check the wiring
  • if still "no data", run:
meshtastic --info

and verify the the environmental_measurement_plugin_sensor_type and environmental_measurement_plugin_sensor_pin

Example of T-LoraV1 with Dallas DS18B20 temperature sensor

Setup of a T-LoraV1 with DS18B20 temperature sensor.

<img src="T-LoraV1 with DS18B20" src="/img/hardware/lora_v1_with_DS18B20.jpg" style={{zoom:'25%'}} />

Requirements:

  • T-LoraV1 (but any esp32 should work, just be sure to double check which GPIO to use)
  • DS18B20 sensor
  • 10 Kohm resistor (optional, but recommended)
  • breadboard (optional)
  • two red wires (could be a different color, but 5V is typically red)
  • two yellow wires for GPIO (could be a different color)
  • one black wire (could be a different color, but GROUND is typically black)

Steps:

  • disconnect power/battery
  • connect black wire from GROUND to "-" on the DS18B20
  • connect yellow wire from DAT pin to a row on bread board
  • connect red wire from 5V to a row on breadboard
  • connect resistor between red and yellow rows
  • connect red wire from row with red to "VCC" on DS18B20
  • connect yellow wire from yellow row to GPIO on device (ex: GPIO21)
  • double check the cabling (if you get it wrong, you can damage the device and/or the sensor)
  • plug in device
  • configure the device:
meshtastic --set environmental_measurement_plugin_measurement_enabled true --set environmental_measurement_plugin_screen_enabled true --set environmental_measurement_plugin_update_interval 15 --set environmental_measurement_plugin_display_farenheit true --set environmental_measurement_plugin_sensor_type DS18B20 --set environmental_measurement_plugin_sensor_pin 21

:::tip You can change the values above to suit your needs. The commands can be run one at a time or in a group as show above. :::

  • reboot/reset the device (press the RST button or unplug/plug in the device)
  • when the device boots it should say "Environment" and it may show the sensor data
  • if "no data", then triple check the wiring
  • if still "no data", run:
meshtastic --info

and verify the the environmental_measurement_plugin_sensor_type and environmental_measurement_plugin_sensor_pin

Example of RAK 4631 with Environment Sensor

Setup of a RAK 4631 with Environment Sensor

<img src="RAK4631_with_EnvSensor" src="/img/hardware/rak/RAK4631_with_EnvSensor.jpg" style={{zoom:'25%'}} />

Requirements:

  • RAK4631
  • Environment Sensor

Steps:

  • configure the device:
meshtastic --set environmental_measurement_plugin_measurement_enabled true --set environmental_measurement_plugin_screen_enabled true --set environmental_measurement_plugin_update_interval 15 --set environmental_measurement_plugin_display_farenheit true --set environmental_measurement_plugin_sensor_type 6

:::tip You can change the values above to suit your needs. The commands can be run one at a time or in a group as show above. :::

  • reboot/reset the device (press the button or unplug/plug in the device)
  • when the device boots it should say "Environment" and it may show the sensor data
  • if still "no data", run:
meshtastic --info

and verify the the environmental_measurement_plugin_sensor_type

Known Problems

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