Project idea: https://miro.com/app/board/uXjVLBm7F8w=/?share_link_id=117991010729
Motivation
In order to observe my houseplants' respiration, a prototype of (soap) bubble maker machine is being developed. The quantity of (soap) bubbles will be in accordance to the CO2 level of the plants' (closed) environment.
Materials
- ESP32
- CO2 sensor MH-Z19C
- Stepper motor 28BYJ-48
- Stepper motor driver module ULN2003
- PWM fan AMD Ryzen 7 1700
- 10kΩ resistor
- Power supply 12 volts
- Lots of cables...
Gallery
The Plant Plant Gallery (Nextcloud Bauhaus Uni), Password: theplantplant (CO2 sensor first trial pictures are inside)
References
CO2 sensor MH-Z19C
- https://www.neumueller.com/datenblatt/neumueller/MH-Z19C.pdf (Datasheet)
- https://randomnerdtutorials.com/esp32-uart-communication-serial-arduino/ (Concept, wiring, code)
PWM fan AMD Ryzen 7 1700
- Arduino Fan Control using High Frequency 25kHz PWM // 4-Wire CPU Fans - YouTube (Concept, wiring, code); adapted to ESP32
Stepper motor 28BYJ-48 and stepper motor driver module ULN2003
- https://randomnerdtutorials.com/esp8266-nodemcu-stepper-motor-28byj-48-uln2003/ (Concept, wiring, code); adapted to own implementation