ESP 32 GENERAL PURPOSES RELAY BOARD This board has some useful features:
4x SPDT Relays with independent power supply
5x Solid State Relays
6x GPIO pin connected to 4x PWM pin and 6x ADC pin.
1x I2C port
2x UART port (1x for debug and programming)
I2C Real Time Clock Module
I2C Oled Display
3x buttons
1x RGB Led
1x buzzer
1x SDCard slot
You can use this board for any project like:
IoT home automation
You can use the relays or solid state relays for controlling your home equipment based on time or other conditions.
Smart incubator
You can add sensors like DHT11/DHT22 for humidity and temperature monitoring or an LDR circuit that is connected to the GPIO pin then you can use relays to control the heater or fan.
Smart greenhouse
You can add sensors like soil sensors and DHT11/DHT22 for humidity and temperature monitoring that is connected to the GPIO pin then you can use relays to control the water pump or heater and fan.
Data logger
You can use the Micro SDCard slot to record all activity and your sensor data.