ESP8266 is a very popular and inexpensive WiFi-chip that can be a real contributor for taking small gadgets to the Internet. I recently bought an Adafruit Feather Huzzah ($18). It is build around ESP8266 which means WiFi-connectivity, but has some additional features compared to the simpler ESP8266 modules available: A USB-port for serial transfer and programming […]Read More Meet the Huzzah!
With an Arduino and some servos lying around, I find it hard not to try out something robot-like. An obstacle-avoiding mini car is probably one of the easiest projects to get started with and as our house is abundant with Lego, the building blocks for the construction are readily available.Read More A Lego robot car with Arduino and servo motors
In my previous post, I experimented with sending measurements values from an Arduino UNO to a Raspberry Pi via a 433 MHz radio protocol. After testing the setup for a few days, I decided to make some improvements: Add an additional sensor for measuring outdoor temperatures. Now there will be four different sensor values transmitted […]Read More Arduino to Raspberry wireless communication – some improvements
The Arduino computers are excellent for reading sensor data, and they are so inexpensive and consume very little power that you can use plenty of them in your home without breaking your wallet. The Raspberry on the other hand, is more powerful, a bit pricier, but can easily be programmed to perform more challenging tasks […]Read More Major Tom to Ground Control – simple radio communication between Arduino and Raspberry
In this post I will show how I have used a Raspberry Pi as a relay server that can be controlled via a web app on e.g. a mobile phone or via REST calls. The system consists of: A Raspberry Pi 2 with Raspbian A set of relays connected via the GPIO pins on the RPi […]Read More Control your home with a Raspberry Pi and a mobile phone