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Tag: 433 Mhz

Posted on 7 January, 20181 March, 2018

RFXtrx433E, Node-RED, MQTT and Home Assistant

This post describes how I have setup an RFXtrx433E device with a Raspberry Pi to transform data from inexpensive 433 MHz motion- and climate-sensors into MQTT messages on my local…

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Posted on 26 March, 201730 October, 2017

The Sensor433 library and Geeetech transmitters and receivers

As I use 433MHz transmitters for sending sensor data from many of my IoT-nodes, I have made a re-usable Arduino library for this purpose. The transmitted sensor data is picked…

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Posted on 7 February, 201730 October, 2017

Home Assistant – integrating RESTful switches

I have started integrating my IoT-devices and services with the Home Assistant platform. See my previous post for details on getting started with Home Assistant and subscribing to MQTT messages:…

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Posted on 3 November, 201630 October, 2017

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…

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Posted on 26 October, 20167 January, 2018

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…

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Posted on 25 July, 201610 January, 2018

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…

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Posted on 15 May, 201610 January, 2018

RCSwitch revisited – control RC outlets with a web app

In two previous posts, I used the RCSwitch and pi-switch libraries for communication between an Arduino Uno and a Raspberry Pi. I touched briefly on the main purpose with these libraries…

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Posted on 20 March, 201630 October, 2017

Arduino to Raspberry wireless communication – some improvements

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…

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