Robot platform for future development

Over the last weeks, I was building a moving robot platform with OpenBeam aluminum profiles from The platform should serve as a base for future development with the Raspberry Pi and OpenCV. Therefore I got a nice OpenBeam kit with different aluminum profile lengths. For the fixture, I’m using the metal brackets from the kit … Read more

ESP8266 Ai-Thinker ESP-12 library for Eagle

I started working on a little ESP8266 project again. This time with an ESP-12 module from Ai-Thinker. Therefore I created a new part in Eagle after the specifications from Ai-Thinker (Technical Specifications). My purchased module has a slightly different silkscreen as shown in the document. The module I have has GPIO4 and GPIO5 swapped and … Read more

Build a garden controller for soil moisture

To improve the efficiency of automatic garden watering systems, I tested some methods to measure the soil moisture. Mainly I tried resistive and capacitive methods. For connecting the sensors to a home automation system I need an adapter circuit. It should read the sensor periodically and send the data to the home automation system. All … Read more