A sensor monitor with OLED in MicroPython
I have different sensor nodes at home that publish measurements at regular intervals to a Raspberry Pi. The data is stored on the RPi and in a cloud service and can…
Category: Raspberry Pi
Preparing the remote control app for Christmas
Winter is soon to arrive in Sweden and the amount of daylight is decreasing every day. Thus it’s time to set up some extra light sources indoors and outdoors. I…
Radio chirp data incorporated in an MQTT environment
Internet-of-things does not require that every device has to be directly connected to the Internet. The complexity and possible security issues with every sensor having its own IP address would in…
A low energy open door detector with radio signals and MQTT
This blog post describes how I have set up a door-open detector at home. It uses a small ATtiny85 board that broadcasts a 433 MHz signal every time the door…
A web app for IoT data visualization
As described in some earlier posts, I have a setup at home with IoT devices that publish measurement messages to a Raspberry Pi via MQTT. The RPi stores the data in…
A self-hosted MQTT environment for Internet of Things – Part 3
In the last post in this series, I will add persisting of sensor data to a database. I will also use an additional subscriber as a proxy for sending the…
A self-hosted MQTT environment for Internet of Things – Part 2
In the second post in this series, I will setup two ESP8266 microcontrollers with MQTT publishing through a Raspberry Pi-hosted Mosquitto broker. The idea is that the microcontrollers will send…
Daemonize that Python script!
This post builds on a previous experiment where I made a remote control app for my outlets with a Raspberry Pi, Python/Flask and AngularJS. For the backend to be really useful,…
Thingsmatic 