https://github.com/jehy/arduino-esp8266-mh-z19-serial

CO2, humidity and temperature sensor on ESP8266
https://github.com/jehy/arduino-esp8266-mh-z19-serial

arduino co2 esp8266 humidity mh-z19 mhz-19 temperature temperature-sensor wemos wemos-d1

Last synced: 2 months ago
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CO2, humidity and temperature sensor on ESP8266

• Host: GitHub
• URL: https://github.com/jehy/arduino-esp8266-mh-z19-serial
• Owner: jehy
• License: bsd-2-clause
• Created: 2016-02-08T15:08:47.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2022-02-06T22:29:55.000Z (almost 3 years ago)
• Last Synced: 2024-04-14T11:05:27.135Z (9 months ago)
• Topics: arduino, co2, esp8266, humidity, mh-z19, mhz-19, temperature, temperature-sensor, wemos, wemos-d1
• Language: C++
• Homepage:
• Size: 87.9 KB
• Stars: 57
• Watchers: 5
• Forks: 18
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Arduino esp8266 mh-z19 serial

[![Build Status](https://github.com/jehy/arduino-esp8266-mh-z19-serial/actions/workflows/compile-sketch.yaml/badge.svg)](https://github.com/jehy/arduino-esp8266-mh-z19-serial/actions/workflows/compile-sketch.yaml)

[![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://www.paypal.me/jehyrus)

[![License](https://img.shields.io/badge/License-BSD%202--Clause-orange.svg)](https://opensource.org/licenses/BSD-2-Clause)

CO2, humidity and temperature sensor on ESP8266 with mh-z19 co2 sensor and dht-22 temperature and humidity sensor.

You can either use custom backed server to receive data in JSON or build in MQTT client to publish data to MQTT server.

![sensor sample](https://github.com/jehy/arduino-esp8266-mh-z19-serial/raw/master/sensor.jpg)

You can use project [https://github.com/jehy/co2-online-display](https://github.com/jehy/co2-online-display) as backend to this program.

See full description on [https://geektimes.ru/post/270958/](https://geektimes.ru/post/270958/) (you can use Google translate from Russian).

# Compilation

All required libraries can be installed with Arduino IDE:

## Via console:

```bash

arduino --pref "boardsmanager.additional.urls=http://arduino.esp8266.com/stable/package_esp8266com_index.json" --save-prefs

arduino --install-library "ArduinoJson:6.14.1"

arduino --install-library "Adafruit Unified Sensor:1.1.2"

arduino --install-library "DHT sensor library:1.3.8"

arduino --install-library "LiquidCrystal I2C:1.1.2"

arduino --install-library "PubSubClient:2.8.0"

arduino --install-boards esp8266:esp8266

cp settings.sample.h settings.h # EDIT AFTER COPY!

arduino --verify --board esp8266:esp8266:d1:CpuFrequency=80,FlashSize=4M3M arduino-esp8266-mh-z19-serial.ino

```

## Manually:

1. Copy file `settings.sample.h` to `settings.h` and specify your settings;

2. Install [Adafruit Unified Sensor](https://github.com/adafruit/Adafruit_Sensor) version 1.1.2;

3. Install [DHT sensor library](https://github.com/adafruit/DHT-sensor-library) version 1.3.8; 

4. Install [ArduinoJson library](https://arduinojson.org/) v 6.14.1;

5. Install [LiquidCrystal_I2C library](https://github.com/marcoschwartz/LiquidCrystal_I2C) v 1.1.2;

6. Compile and upload your sketch;

7. Enjoy!

For Wemos D1, before compiling sketch:

1. Add `http://arduino.esp8266.com/stable/package_esp8266com_index.json` to additional boards in preferences;

2. Select wemos D1 (or your other board) in boards manager and install it.

## MQTT with Home Assistant

You can use config which looks like this:

```yaml

sensor:

  - platform: mqtt

    unique_id: esp-terrace-co2

    name: "ESP terrace CO2"

    state_topic: "esp/terrace/co2"

    qos: 0

    unit_of_measurement: "ppm"

  - platform: mqtt

    unique_id: esp-terrace-humidity

    name: "ESP terrace Humidity"

    state_topic: "esp/terrace/humidity"

    qos: 0

    unit_of_measurement: "%"

  - platform: mqtt

    unique_id: esp-terrace-temperature

    name: "ESP terrace Temperature"

    state_topic: "esp/terrace/temperature"

    qos: 0

    unit_of_measurement: "ºC"

```