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

Feature 1 Onboard stable ESP32 WROOM 32E module large capacity 4M Byte Flash2 The I O port and UART program download port of the ESP32 module are all led out which is convenient for secondary development3 Onboard AC DC switching power supply module power supply mode supports AC90 250V4 Onboard ESP32 module RST reset button and IO0 programmable button5 ESP32 supports the use of ARDUINOIDE development tools and provides reference programs6 On board 1 way 5V relay output switch signal suitable for controlling loads with working voltage within AC90 250V7 Onboard power indicator 1 programmable LED and relay indicatorInterface 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 closingCOM CommonNO Normally open the relay is suspended before closing and short circuited with COM after closingPackage includes 1 x Relay module with pins