That board is designed in Europe. All boards arrive without configuration codes. Upload your own code on ESP32 4 Channel Relay Development Board and you can turn it into wide range application electronic product for monitoring and controlling electrical devices over Wi-Fi or Bluetooth connectivity.Via simple connection it may be used for set, collect and monitoring data of electronic sensors and units. The device has plenty of applications, like following ones: · Home automation, lights, doors, water pump, fan, DIY and many other controls Specification: · Number of Relays: 4 · Number of Inputs: 5(4 + 1 analog) · Power supply voltage: 5V DC (via USB or terminal connector) · Relay switching power: 15A/24VDC (125VAC) 10A/250VAC · Communication: Wi-Fi/Bluetooth; Connection of every relay, terminal input to its relevant GPIO pin: · Relay1 – GPIO21 · Relay2 – GPIO22 · Relay3 – GPIO18 · Relay4 – GPIO19 · AN1 – GPIO36 · IN1 – GPIO05 · IN2 – GPIO12 · IN3 – GPIO13 · IN4 – GPIO14 · CSB – GPIO23 · SDI /SDA – GPIO26 · SDO – GPIO25 · SCK /SCL – GPIO27 · LED (LINK) - GPIO15 · Set Button – GPIO04Package content: · 1pcs ESP32 4 Channel Relay Development Board
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