Domoticz weatherdata to Cresta and other devices
Posted: Saturday 25 June 2016 18:14
Dear all
I was early user of Domoticz, probably since its early beginnings, for my KaKu-devices. It was a bit crappy initially but it has matured significantly and now there are not too many issues any more.
Some years ago I got a Cresta weatherstation (for my birthday) and it turned out that outside temperature and humidity were available to Domoticz. Since then a lot happened and now I have a personal, home built, weather station (RPi) that provides data to Weather Underground and that I can obtain again in Domoticz for display and other purposes.
My interest now is to distibute the info from the weatherstation to displays of the Cresta device and others. I have a little c-program that will just do that and with a scheduler like crontab it will send the required info every 53 seconds (every device has its own rules) across the 433 MHz band to be picked up by the Cresta device. This is working fine as a stand alone thing.
I realized that it should be possible to extract the info from Domoticz and send it through the RFXCOM interface to the Cresta device. This would put the superseded displays to use again. Questions are now
1. did anyone already do this and where is it documented?
2. if not, what should I learn to access the RFXCOM and how do I get the info from the internals of Domoticz?
I have not gone through the enormous forum that is available but a quick search did not bring a hit. But then I may have posed the wrong question. Somebody ready to help or advise?
Thanks in advance,
Ger
PS This is the inverse process of what usually is done. I do not need to know how to send weather data from sensors to Domotics, I want to know how to send Domoticz data to displays using Domoticz.
I was early user of Domoticz, probably since its early beginnings, for my KaKu-devices. It was a bit crappy initially but it has matured significantly and now there are not too many issues any more.
Some years ago I got a Cresta weatherstation (for my birthday) and it turned out that outside temperature and humidity were available to Domoticz. Since then a lot happened and now I have a personal, home built, weather station (RPi) that provides data to Weather Underground and that I can obtain again in Domoticz for display and other purposes.
My interest now is to distibute the info from the weatherstation to displays of the Cresta device and others. I have a little c-program that will just do that and with a scheduler like crontab it will send the required info every 53 seconds (every device has its own rules) across the 433 MHz band to be picked up by the Cresta device. This is working fine as a stand alone thing.
I realized that it should be possible to extract the info from Domoticz and send it through the RFXCOM interface to the Cresta device. This would put the superseded displays to use again. Questions are now
1. did anyone already do this and where is it documented?
2. if not, what should I learn to access the RFXCOM and how do I get the info from the internals of Domoticz?
I have not gone through the enormous forum that is available but a quick search did not bring a hit. But then I may have posed the wrong question. Somebody ready to help or advise?
Thanks in advance,
Ger
PS This is the inverse process of what usually is done. I do not need to know how to send weather data from sensors to Domotics, I want to know how to send Domoticz data to displays using Domoticz.