ESP32 Development Board--Onboard mature and stable ESP32 module, with large capacity 4M Byte Flash, for use. All I/O ports and UART program download ports of the WIFI module are connected for easy secondary development Onboard AC-DC switching power module, supporting AC90-250V/DC7-30V/5V power supply mode;On board WIFI module RST reset button; ESP32-WROOM-32E supports the use of development tools such as ECLIPSE/ARDUINO IDE, providing reference programs in the ARDUINO development environment; Onboard 4-channel 5V relays, outputting switch signals, suitable for controlling loads with operating voltages up to AC250V/Dc30V;Onboard power indicator light, 1 programmable LED and relay indicator light. ESP32 Development Board 4 Way Relay Module Programmable Resettable Development Board for Smart House Control

The AC / DC powered esp32 four-way relay development board is equipped with esp32-wroom-32ewifi & ble module. The I / O port is fully led out and supports AC220V / dc5-30v power supply mode.

For esp32

Secondary development and learning, smart home, wireless control and other occasions.

Writing port: GND, Rx, TX and 5V of esp32 are respectively connected to GND, TX, RX and 5V of external TTL serial port module. IO0 needs to be connected with GND during downloading, and then disconnect the connection between ioo and GND after downloading; Connection of;

Relay output:

NC: normally closed end, short circuited with com before the relay is pulled in, and suspended after it is pulled in; COM: public end;

No: normally open, the relay is suspended before closing, and is short circuited with com after closing.