characteristic

• Four-way optocoupler isolation relay.
• Use Blinker App for remote control or status viewing, and supports OTA over-the-air upgrades.
• It adopts the market-recognized domestic WiFi chip-ESP8266, which can also be used as an MCU without the need for additional microcontrollers.
• Compatible with Arduino IDE and VS code to write programs, easy to get started.
• Supports four elves and Siri voice access.

3D preview

1.0

1.2

Program burning

• The program only needs to modify the key and WiFi information.

Hardware description

relay

• Optocoupler isolation + flywheel diode (freewheeling) + indicator light
• 1mm isolation slot for strong and weak currents, 15mm quiet zone for weak currents
• No copper is laid on the top and bottom, and the top and bottom traces are 2.2mm wide, perfectly supporting the maximum contact current of 3A.

ESP12F

• Arduino writes a program and uploads it to the serial port for automatic burning.
• ESP 12F has 9 available IOs, and ESP 01s has two available IOs. It can only control four relays and cannot provide a temperature and humidity interface.
• The antenna extends deep outside the PCB to ensure sufficient signal stability.

Log

2020.8.23 1. Fix the problem that the program cannot be downloaded: the design of the ESP12F part of the schematic diagram is incorrect. 2. Fix the bug that the LED cannot light up and the relay cannot be triggered: the LED welding direction is wrong.

References

• ESP-01s single-channel relay
• Touch desk lamp design based on ESP-07