AC/DC power supply ESP32 WIFI Bluetooth BLE single-channel Dual-channel 4-channel Relay Module ESP32 Development Board

1. Onboard stable ESP32-WROOM-32E module, large capacity 4M Byte Flash

2. The I/O port and UART program download port of the ESP32 module are all led out, which is convenient for secondary development

3. Onboard AC-DC switching power supply module, power supply mode supports AC90-250V

4. Onboard ESP32 module RST reset button and IO0 programmable button

5.ESP32 supports the use of ARDUINOIDE development tools and provides reference programs

6. On-board 1-way 5V relay, output switch signal, suitable for controlling loads with working voltage within AC90-250V

7. Onboard power indicator, 1 programmable LED and relay indicator

Burning port: GND, RX, TX, 5V of ESP32 are connected to GND, TX, RX, 5V of external TTL serial port module respectively. IO0 needs to be connected to GND when downloading. After downloading, disconnect the connection between IO0 and GND.

Relay output:

NC: Normally closed terminal, the relay is short-circuited with COM before closing, and it is left floating after closing

COM: Common

NO: Normally open, the relay is suspended before closing, and short-circuited with COM after closing

1 x Relay module with pins