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How to flash Luminea WiFi Power Outlet

I bought an WiFi Power Outlet by Pearl, it is realy small and compact.but it can only be operated via the internet.But I needed an Wifi power Outletfor my own purposes with micropython.

First step: open the housing with the four screws on the back.Now you see the PCB.

see plug01.jpg

in order to remove the board two solder joints have to be removed L-in and N-innext to the relais.

Next step: in order to flash the ESP we have to solder the wiresVcc, Ground, Tx, Rx and IO 0 for FlashMode

see plug02.jpg

To flash the ESP :we have to use a separate power supply with 3.3 Volt with at least 200 mAand we need a USB to UART Adapter.Be careful with the Chinese PL230x, you need a special driver.But ok, to flash an ESP many tutorial you will find in the net.

I used uPyCraft and the latest micropython ESP8266.bin to flash.Don't forget to bring IO 0 to ground befor power on the ESP, to switch to flash mode!Sometimes i needed several tries zu get in erase/flash mode. I don't know, maybe is it the cheepUART adapter.

I use the PIN numbering from micropython:

• PIN 2 Output switch on / off the green LED
• PIN 15 Output switch the Power Relais
• PIN 12 Output wired to the Select Input of HLW 8012
• PIN 05 Input wired to the CF Output of HLW 8012
• PIN 14 Input wired to the CF1 Output of HLW 8012
• PIN 13 Input state of the fronttaster

HLW 8012 is an special ic for measuring the voltage, current and power.It convert a analog voltage to a square wave signal on CF and CF1

• CF is the power consumption 1Hz ~ 12 Watt, 10Hz ~ 120 Watt ....
• CF1 is either voltage (1) or current (0) dependent on the level on the PIN 12 (Select)

A simple example is given by lumi_test.py

The best solution is to operate the WiFi switch over the air!In boot.py and wifi.py configure your WiFi settings and enable the WebREPLI tried out the WebREPL and a simple FTP Server, it works fine

viel SpassDetlev Aschhoffinfo@vmais.de