430.Power ESP8266 with Mains Voltage using Hi-Link HLK-PM03 Converter Using the Hi-Link HLK-PM03 converter, you will learn how to power the ESP8266 (or ESP32) using mains voltage in this tutorial. We'll demonstrate how the ESP8266-01 may be used to control a relay by connecting it to a web server. Both the ESP32 and ESP8266 are inexpensive Wi-Fi modules that are excellent choices for Do It Yourself (DIY) projects involving the Internet of Things (IoT) and Home Automation. When combined with a relay, an ESP32 or ESP8266 gives you the ability to remotely control any AC electronic appliance using Wi-Fi (using a web-server, for example).

Finding an appropriate power source for the ESP32/ESP8266 that has a tiny form factor at the same time is one of the most challenging aspects of these projects (in a final application, you do not want to power the relay and the ESP32/ESP8266 using two different power supplies). Using the AC/DC converter Hi-Link HLK-PM03 to draw power from the mains voltage in order to power the ESP8266 or ESP32 is one method (or HLK-PM01 model). Introducing the Hi-Link HLK-PM03/01 Converter Modules The Hi-Link HLK-PM03 is an AC/DC converter module that is quite compact. The HLK-PM03 AC/DC converter can obtain 3.3V from either 110VAC or 220VAC, depending on which input voltage is used. Because of this, it is ideal for use in modest applications that require a supply of 3.3V from the mains voltage. The HLK-PM01 is another option for achieving the desired output of 5V. We will be utilizing the HLK-PM03 to supply 3.3V to the VCC pin of the ESP8266-01 so that it can be powered by the mains voltage. If you need to power other ESP8266 models or an ESP32 through the VIN pin with 5V, you can use the HLK-PM01 model, which has a 5V output and functions in a manner that is analogous to that of the original. Safety Warning: This project deals with voltage that comes from the mains. Check that you have a firm grasp on the activities at hand. Please make sure you give the safety warning a thorough read. Powering the ESP8266 with AC using the Hi-Link HLK-PM03 module You don't need any additional circuitry to utilize the HLK-PM03; simply connect it straight to the VCC pin on the ESP8266. Having said that, I don't think that's a good idea. It is highly recommended that a protective circuit consisting of a thermal fuse and fast-acting fuses be added. When powering an ESP8266 device, it is a good idea to add capacitors to the output of the

HLK-PM03 so that the voltage peaks are smoothed out and unexpected resets or unstable behavior are avoided. In addition, we have installed a varistor across the mains input in order to shield the circuit from sudden spikes in voltage.

The following is a list of all of the components that are need to construct the

HLK-PM03\ESP8266-01\ESP8266-01 Programmer Relay Module Compatible with FTDI Serial Adapter (3.3V) Terminal blocks consisting of two connections each Terminal blocks consisting of three connectors each Electrolytic capacitor 10uF Electrolytic capacitor 22uF Slowly Blow the Fuse (200mA) Thermal Fuse (72 degrees Celsius) Blow the Fuse Quickly (630mA) Varistor Stripboard (Prototyping Circuit Board) Connecting Wires

The connection to the mains voltage should be made at the J1 terminal block. The ESP8266-01 will be powered by the 3.3V and GND that are provided after the capacitors. A three-terminal block that is attached to the ESP8266 has also been added in order to gain access to 3.3V, GND, and GPIO 2 in order to operate an output (relay module). Due to the fact that we are working with 3.3V, you should make use of a 3.3V relay module similar to this one.

After you have uploaded the code to the ESP8266 and obtained the IP address, you will need to insert it into the circuit and then provide power to the circuit. Caution: the circuit should not be touched while it is still linked to the mains voltage! Launch your web browser, enter the IP address of the ESP, and the page that you see here should load. On your local network, you have to have the capability of controlling the relay remotely. Both the HLK-PM01 and the HLK-PM03 are examples of converter modules. They take the mains voltage and convert it into either 5V or 3.3V. This makes it simple for you to supply electricity to your ESP8266 or ESP32 when working on Internet of Things and Home Automation projects. We sincerely hope that you have found this effort to be beneficial.