Easiest text protocol to use if xmitting from Adrunio/Radiohead.h ?
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Thomas Weeks
Apr 30, 2025, 5:11:35 PMApr 30
to rtl_433
New to 433MHz data formats (there seems to be a lot of them). I'm planning on using an arduino + radiohead library to xmit on one of those cheap 433MHz xmitters. What protocol is the most flexible if using rtl_433 (with an RTL-SDR receiver) to receive and decode my text data. Not a lot of text here.. like.. under 30 characters.
Thoughts? Opinions?
T.WEeks
Thoughts? Opinions?
T.WEeks
David Todd
Apr 30, 2025, 6:08:13 PMApr 30
to Thomas Weeks, rtl_433
Thomas,
Check out Omnisensor, https://github.com/hdtodd/omnisensor_433 to see if it would be useful. 8 bytes of payload data, configurable in 16 different formats (only two defined in the repository). Simplest approach might be to use Format=0 and decode the hex string at the end site.
As is, you'd need to install the "omni.c" driver in you own rtl_433 server. I'll submit that driver for inclusion in the base system, so I'm hoping that using that protocol will be much easier in the near future.
I also implemented WP_433, https://github.com/hdtodd/WP_433, as an Arduino-based remote weather sensor that uses the "Omni" protocol for transmission.
And I implemented on Pico and Sparkfuns a few emulators of other protocols that might work just as well for you if you're doing a weather sensor: https://github.com/hdtodd/Emulators-433
David
Check out Omnisensor, https://github.com/hdtodd/omnisensor_433 to see if it would be useful. 8 bytes of payload data, configurable in 16 different formats (only two defined in the repository). Simplest approach might be to use Format=0 and decode the hex string at the end site.
As is, you'd need to install the "omni.c" driver in you own rtl_433 server. I'll submit that driver for inclusion in the base system, so I'm hoping that using that protocol will be much easier in the near future.
I also implemented WP_433, https://github.com/hdtodd/WP_433, as an Arduino-based remote weather sensor that uses the "Omni" protocol for transmission.
And I implemented on Pico and Sparkfuns a few emulators of other protocols that might work just as well for you if you're doing a weather sensor: https://github.com/hdtodd/Emulators-433
David
On 4/30/25 5:11 PM, Thomas Weeks wrote:
New to 433MHz data formats (there seems to be a lot of them). I'm planning on using an arduino + radiohead library to xmit on one of those cheap 433MHz xmitters. What protocol is the most flexible if using rtl_433 (with an RTL-SDR receiver) to receive and decode my text data. Not a lot of text here.. like.. under 30 characters.
Thoughts? Opinions?
T.WEeks --
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