Upcycle a radio-controlled power plug with an ESP8266 for my home automation project

Parts:

• an old radio-controlled power plug (discard the electronic)
• HLK-PM01 intergated 5V DC power module
• K1CK005W or any other 5V relais capable of switching sufficient current
• 2 fuses and sockets (one for the relais and one for power supply)
• LF33-CDT low-drop 3.3V regulator
• ESP-01 module
• IRLML2502 or any other MOS-FET for driving the relais
• some capacitors and resistors

ESP-Pinout (as I connected it):

• GPIO2: output to FET and relais
• GPIO1 (or TXD): output for LED
• GPIO3 (or RXD): input for on/off button
• GPIO0: input for "learn" button

It's based on the Arduino Arduino core for ESP8266 and needs these libraries:

• WiFiManager
• Arduino Client for MQTT