How to start? App for 868.35MHz sensors


#1

One of my homey challenges is to catch the signals from my alarm system. (Its an older system without smart interface)

Every room in the house has a wireless sensor, would be great if I could use these for presence detection.

I searched for an app that could read the sensors but did not find one. So the challenge is to create one myself (with a little help) have no idea how to start and do not have a lot of software skills…

My sensors are 1way sensors 868.35MHz.
(Examples:https://www.pahedomotica.nl/product-categorie/alarmsystemen/accessoires-prime-proguard800/)

So the interface is probably simple: identifier for the unit & on/off signal.

There could be 2 ways to go:
1 Read the RF signal that is send by the sensor (how?) and build an app that monitors for that signal.
(Trigger a sensor, catch the signal, use that)

2 figure out the the RF coding and build an app around that.

Suggestions on how to start are welcome :slight_smile:

(Or maybe I missed an app thet excist)
Greetings Frank


#2

Hi,
I found a guy who hacked a 433 system…
Perhaps you could use this technic for hacking your system in some way…
I hope it helps…


#3



https://developer.athom.com/docs/apps/index.html
Stuff you can read to inform you what you ca do with Homey. It’s also about 868MHz


#4

The video from @Jojje is absolute educational how to use en 10 $ DVB-T USB stick on an Raspberry Pi.
But it will not help you in how to capture the signal the way Homey Analyzes it.

The Links from @JPe4619 from Athom and the GitHub from @HarriedeGroot are absolute the way you should investigate the signal to build your Apps on Homey.
Just in 5 minutes to capture a signal and analyze it with the Athom-Homey-RF-Signal-Analyzer to verify my by hand made signal what cost me a lot of time (some evenings) last year I created my first basic 433 App.


#5

If you’ve got any problem using the tool, please let me know. All suggestions for improvements are welcome.