ACE-N-553640-82  8 Channel Relay Module ESP-12F Development Board Power Supply 5V/7-28V Wireless Wifi Module ESP8266

Description:

This CE-N-553640-82 ESP8266 WIFI 8-Channel Relay Module ESP-12F Development Board is perfect for Arduino development environment with reference code and is suitable for ESP8266 secondary development and learning, smart home wireless control and other occasions.

It is an ideal solution for home automation, remote control, sensor networks, industrial control, and other IoT applications. The 8-channel relay can be controlled by WiFi Net, iOS/Android App, and web page. It can be used to control lights, electrical equipment and other appliances remotely.

The product is easy to set up and use, and comes with a detailed user manual. It has an integrated high-precision 10A AC/DC dual-channel optical coupling isolation module and a power-on self-test function. With this product, you will enjoy the convenience of smart home control.

• Feature:
• 1. Onboard mature and stable ESP-12F WIFI module, large capacity 4M BYTE FLASH;
• 2. The power supply mode supports DC7-28V/5V;
• 3. The onboard Wi Fi module RST reset button;
• 4. ESP-12F supports development tools such as Eclipse/Arduino IDE, and provides reference programs for Arduino development environment;
• 5. Provide reference programs under the Arduino development environment;
• 6. There are 8 channel 5V relays on board, which output switch signals, suitable for controlling loads whose working voltage is within AC250V/DC30V;
• 7. Onboard power indicator and relay indicator.

1. The Board
   The microcontroller is an ESP8266 12F and can be programmed with the Arduino IDE. I use the settings of the Node MCU 0.9 for the upload.
2. 8 relays are connected to GPIOs. The outputs are HIGH active. The relays are connected to GPIO16, GPIO14, GPIO12, GPIO13, GPIO15, GPIO0, GPIO4 and GPIO5. On startup GPIO16 and GPIO15 will be active for a very short time – you will hear the two relays. Take this in consideration when you use these two relays as outputs.
3. GPIO0 and GPIO2 are available on a separate header, but remember, that GPIO2 is also connected to the (blue) LED on the ESP itself. The ADC is also available on the header. You can solder a header to gain access to following pins:

• 5V
• TXd – GPIO1
• RXd – GPIO3
• IO0 – GPIO0 – connect to GND and reboot (power cycle) if you need to set the ESP8266 in flash mode
• GND
• GND
• IO2 – GPIO2 – also used for the (blue) LED on the ESP8266
• ADC – A0 – the analog input of the ESP8266