ESP8266 non-isolated power supply smart speaker single-channel relay module

The following features: 1. Use MP150 for power supply. Most of the ESP8266 relay modules currently on the market need to be connected to a separate power supply, which is very troublesome. Directly use a non-isolated power supply to solve these troubles. 2. Use the RXD pin to control the relay. The power-on register will not switch randomly. 3. Use the TXD pin + GPIO0 to connect the original 86 switch. No traditional single-pin detection is used to avoid the status of the switch during power-on affecting the system startup (accidentally entering download mode) 4. Need to connect the neutral line separately 5. Combined with the original 86 switch + IoT control, any switch change will turn on Turn off the lights and provide real-time feedback! 6. To avoid the problem of the single live wire version, the light will be slightly bright.
Current progress:
20221014 has received the PCB and is being tested for welding
. 20230103 has completed all functions.
 
Please note that the module is powered by non-isolated power and is directly connected to strong electricity! ! ! ! Pay attention to safety protection! ! ! Beware of electric shock! ! ! !
 
Source: I originally wanted to buy an ESP8266 relay module from Taobao and install it directly, but I found that the circuit design was extremely bad and required an external 5V power supply.
I couldn’t bear it, so I made my own set
while retaining the original physical switch function. Support Xiaoai, Tmall Elf and Xiaodu.
The function becomes: detect changes in physical switches, feedback the actual operation to the relay, and the relay switches the lights on and off uniformly. By default, the light is turned off when powered on.
The upper wiring terminals from left to right are: switch positive switch negative neutral wire normally closed live wire normally open.
The back uses a 0.5A chip fuse. The new version of the PCB has changed the package
side view thickness structure
 front view. Note that if needed ESP8266 supports OTA update function Please replace the flash with more than 2M.
 
 After powering on, it will automatically enter the network configuration mode. Select the wifi connection starting with ESP, and the browser will automatically jump to 192.168.8.8
 and automatically enter the wifi manager network configuration page.
 
 
 Click on the wifi name to connect from Dian Deng Technology Create a lamp copy device password,
fill in the wifi password and device password, and select your switch type, whether it is an inching switch or a self-locking switch. Generally, the switches at home are self-locking, so just keep the default settings. If
the network is successfully configured, you can also view relevant information.