Arduino CO2 monitor with LCD display - Free 3D Print Model

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877dev

Hobby & DIY>Electronics

IP Report

Print Profile(1)

All

X1E

A1 mini

H2D

P1P

X1 Carbon

P1S

H2D Pro

H2S

P2S

H2C

X2D

A2L

0.16mm layer, 2 walls, 15% infill

Designer

2.2 h

1 plate

5.0(1)

Open in Bambu Studio

Boost

Released

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 (from AliExpress - cheaper but less accurate sensors are SGP30 or CCS811)
Wemos D1 mini v4.0.0 is used for I2C cable connection
Double sided sticky tape to mount (and insulate) Wemos onto LCD
M2 x 5mm screws

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

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