Summer is here and because I like to know how hot it is outside I built a small weather station based on a Espruino Pico. The weather station has a built-in web UI to check the temperature from a computer or mobile phone. The UI is self-contained and hosted directly on the Espruino. No Internet necessary. This is what we will build: Btw. the screenshot shows the current temperature in my apartmen…

In this week's blog post, I would like to show you how to make a data logger. Data loggers are fun to built and the logged data is useful to gain insights. For example to check the humidity in your apartment or to see the temperature profile. Hardware As usual I will use the Espruino Pico for the data logger. For the temperature and humidity sensor, I'm using the HTU21D-F breakout board. You can b…

Today I would like to show you how to build an alarm system with the size of a USB stick. There are a lot of advantages to this. It's so small it can be placed everywhere in a house. The components we use are cheap so it is possible to place a system in each room. The system is not only cheap and tiny but also not very power hungry. Hence, we can power it from a small battery or a USB charger. Th…

The Espruino Pico is a micro-controller which runs JavaScript and has the size of a small USB stick. I backed this project end of last year on Kickstarter and this week I received my rewards. I have to say that the campaign was well organized and the pledges delivered on time. The project also has a website (www.espruino.com) where you can buy the old Espruino version and soon the Espruino Pico.…