CO2 monitor with LCD display
Description
# Quick description: SCD30 combined CO2/temp/humidity sensor with LCD 1602 display. # Operation: The device connects to WiFi and MQTT broker and checks sensor is ok, showing the status at each stage. A heartbeat symbol flashes top right every 10 seconds to show the MQTT connection is alive. # Hardware: Blue backlight I2C LCD1602(1602 Serial LCD Module Display) brand GeekPi Adafruit SCD30 sensor Wemos D1 mini v4.0.0 is used for I2C cable connection # Connections: SCD30 via 3V/GND/SCL/SDA (i2c address 0x61) LCD1602 via 5V/GND/SCL/SDA (i2c address 0x27) # Code on my github: https://github.com/877dev/CO2-Sensor # Further reading: https://wiki.52pi.com/index.php?title=Z-0234 //GeekPi product official website https://arduinogetstarted.com/tutorials/arduino-lcd-i2c https://www.makerguides.com/character-i2c-lcd-arduino-tutorial
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