Design for a humidity-controlled switch, originally intended to be used to run a dehumidifier on a sailboat.
The design is:
- Low power, designed to be battery operated
- Simple, using off-the shelf parts where possible
- Cheap
graph LR
subgraph Tasmota ESP12F_Relay_X2
ESP[Microcontroller<br>ESP8266] -->|Signal| Relay
end
BB[Boat Battery<br>12 V<sub>DC</sub>] --> Buck[DC Regulator<br>Buck SMPS]
ESP <--->|I<sup>2</sup>C| DHT[Humidity Sensor<br>DHT22]
BB -.-|Analog sample| ESP
Relay -->|9 V<sub>DC</sub>| Dehumidifier
Buck --->|9 V<sub>DC</sub>| Relay
- MicroPython Reference
- ESP8266 GPIO
- Tasmota ESP12F Relay X2 - Official Page
- Tasmota ESP12F Relay X2 - PDF