MQTT – My simple switch for wardrobe and bed

In the summer 2017 my wife and I furnished our bedroom with new furniture. The new wardrobe has now LED lightning and the bed has also lightning integrated. But the bed has only one switch for the two LED’s. Switching the LED right and left separately was not possible and switch the wardrobe LED’s off […]

On chip debugging on ESP32 with Eclipse and OpenOCD

With the help of a JTAG adapter, OpenOCD and Eclipse it’s possible to do on chip debugging on an ESP32. In the following chapters I’ll describe how to do that with the following hard- and software. Used hardware: ESP-WROOM-32 board FTDI232 USB to Serial adapter Olimex ARM-USB-OCD-H JTAG adapter In theory it’s possible to program […]

ESP8266 – First steps

During looking for a new solution for measuring the water level in my cistern I stumble about the ESP8266 chip. This chip provides Wi-Fi access at a very low-cost. At eBay I found the ESP-03 model with a price below 4 Euro. But now I go back to the roots of my findings. The ESP8266 […]

The morse code screwdriver

At my birthday I got a „special“ present from my friends. A screwdriver on which are two 1.5 volt batteries are taped on it. That symbolic „electrical screwdriver“ was decorated with some 5 euro banknotes from which I should buy an electrical screwdriver. After thinking about the screwdriver with the two batteries an idea come […]