ESP-Humidifer

Humidifier controller

PlatformIO ESP8266 project

Control power to a humidifier, a relay turns power to the humidifier on and off to reach the desired setpoint. All interaction is via web interface.

On initial startup look for HUMIDIFIER on WiFi, select your AP SSID and enter the password.
IMPORTANT Change the OTA password now.

The device should be connected to WiFi now.
Browse to http://humidifier.YOURDOMAIN or http://\/

Additional Information

Settings

Default relay On/Off minimum time is 15 seconds

EEPROM settings

Default PWM WindowSize time is 60 seconds
WindowSize in mS can be changed by calling http://\/window?val=90000
PID gains may need to be adjusted to get a good response.
Gains can be updated by calling http://\/pid?P=2.0&I=0.50&D=0.00

Parts Used

1. ESP8266 D1 Mini https://www.amazon.com/gp/product/B076F53B6S
2. BME280 Sensor 3.3v https://www.amazon.com/gp/product/B07KYJNFMD
3. 5V One Channel Relay Module Relay Switch with OPTO Isolation https://www.amazon.com/gp/product/B00LW15A4W
4. Short micro USB cable https://www.amazon.com/gp/product/B07FDBQZPK
5. USB Charger (grind down the AC pins until a spade connector fits)
6. Screw terminal block
7. Plastic box

Connections

Relay - ESP8266 D1 Mini
DC+ - 5V
DC- - GND
IN - D1
BME280 - ESP8266 D1 Mini
SCA - D2
SCL - D5
VIN - 3V3
GND - GND

Built with

VSCODE, Platformio, Highsoft Highchart