paulwinex/esp32_time_relay

Time Relay Controller

Simple time relay based on ESP32 + MicroPython

Features

• Single channel for any relay

• Set ON and OFF timer with infinite loop between them.

• Idle mode with turn off display after 30 sec after last activity and turn on on encoder moved.

• Additional commands: RESET, REBOOT

• LED indicator which show current state.

Code features

• Simple implementation of event system

• All logic based on classes

Hardware

• ESP-WROOM-32

• Relay 200v

• LCD Display 2004a 20x4

  https://www.beta-estore.com/download/rk/RK-10290_410.pdf

• I2C adapter for LCD

• Encoder with button

• LED (x2)

• Resistor 220 ohm (x2)

Schematic

Pin on part	Pin on ESP32
LED1 +	D23
LED1 -	RESISTOR
LED2 +	D4
LED2 -	RESISTOR
RESISTOR	GND
ENC +	VCC
ENC -	GND
ENC CLK	D14
ENC DT	D13
ENC SW	D27
RELAY +	VCC
RELAY -	GND
RELAY SIGNAL	D26
LCD VCC	VCC
LCD GND	GND
LCD SDA	D21
LCD CSL	D22

Used external libs

• encoderLib.py

  Encoder library for MicroPython

• python_lcd

  LCD control library. Used only files: lcd_api.py and machine_i2c_lcd.py

How to install

1. Connect on the breadboard or weld hardware as on schematic

2. Flash MicroPython to ESP32

3. Upload external library to ESP32 (you can get it from libs dir) to root of file system

4. Upload main.py and time_relay.py to ESP32

5. Reboot

Main Menu

Line 1: State

• OFFLINE

  Timer is off, nothing happens

• ON

  Timer with POWER ON is in progress

• OFF

  Timer with POWER OFF in progress

Line 2: POWER ON Timer

Setup POWER ON timer

Line 3: POWER OFF Timer

Setup POWER OFF timer

Line 4: Actions

• START ON - start loop from ON state

• START OFF - start loop from OFF state

• STOP - stop timer

• NEXT - switch to next timer now

• RESET - stop and reset timers to 0

• REBOOT - reboot device

• <= - back to main menu (not action)