OBI / Euromate Wifi Plug v2

Property	Value
Manufacturer	OBI / Euromate
Product page	Wifi Stecker Schuko Weiß @ obi.de
Wiki page
Build flag	EUROMATE_WIFI_STECKER_SCHUKO_V2

Introduction

This is the second version of power plugs from obi.de (cf. v1) containing a ESP-WROOM-02. To open the device you need a Y-screw driver bit (~ size 1, screw head is 5 mm in diameter).

Flashing

You need to solder some wires to the following pins:

Like this (soldering GPIO0 is optional but recommended):

Now connect your USB-to-UART converter (RX to TX, TX to RX, GND to GND, 3V3 to 3V3 (mind issues below)). For flashing you can use the prebuild image espurna-x.x.x-euromate-wifi-stecker-shuko-v2.bin. After issuing a esptool.py command you will need to connect GPIO0 to GND, press button S2 and release GPIO0 again. After flashing you will have to press S2 again to restart the device.

Issues

The power from my USB-to-UART converter was not enough for the device to boot up. So I applied external 3.3 V (in this case connect only RX, TX and GND to you USB-to-UART converter (no 3V3!)).