EzThermometer.Device

Connected Thermometer

Description

This sensor displays on its OLED screen and publishes on MQTT the following information :

• temperature
• humidity
• CO2 concentration

Disclaimer

I am not an expert in embedded system programming and C ++. This project was created for personal use and shared for educational purposes.

Hardware

• ESP32 NodeMCU Module WLAN WiFi Dev Kit C Development Board
• DHT22 / AM2302 Temperature and humidity sensor
• MH-Z19C NDIR CO2 Sensor
• AZDelivery AZ-Touch Smart Home Kit de Montage Mural avec Écran Tactile TFT LCD de 2,4 Pouces, contrôleur Tactile SPI XPT2046

Assembly

ArduiTouch Connection Diagram

DHT22	ESP32
+	3.3V
Out	IO32
-	GND

MH-Z19C	ESP32
VCC	5V
GND	GND
TX	RX (IO16)
RX	TX (IO17)

Getting Started

Prerequisites

• Visual Studio Code
• PlatformIO IDE for VSCode

Software Configuration

Before uploading this program to your MCU, you need to set following configuration variables :

WiFi

• WIFI_SSID
• WIFI_PASSWORD

MQTT

• MQTT_CLIENT_ID

• MQTT_SERVER_IP

• MQTT_SERVER_PORT

• MQTT_USER

• MQTT_PASSWORD

• humidityMqttTopic

• temperatureMqttTopic

• co2MqttTopic

Authors

• Amael BERTEAU