CO2Sensor
CO2 sensor for Home Assistant using a MH-Z19 CO2 sensor on a ESP8266 NodeMCU
Note: superseded by HomeMCU
Setup:
- Clone/download this repository
- Copy
include/config.h.example
asinclude/config.h
- Set your configuration in
config.h
- Build/flash like any other PlatformIO project
- The RX pin of MH-Z19 should be connected to GPIO15 (pin labeled D8) and TX of MH-Z19 to GPIO13 (pin labeled D7)
For Home Assistant you'll want something like this in your configuration.yaml:
sensor:
- platform: mqtt
name: "CO2Sensor"
state_topic: "CO2Sensor/state"
availability_topic: "CO2Sensor/availability"
unit_of_measurement: "ppm"
value_template: "{{ value_json.co2 }}"
Over The Air update:
Documentation: https://arduino-esp8266.readthedocs.io/en/latest/ota_updates/readme.html#web-browser
Basic steps:
- Use PlatformIO: Build
- Browse to http://IP_ADDRESS/update or http://hostname.local/update
- Select .pio/build/nodemcuv2/firmware.bin from work directory as Firmware and press Update Firmware