The original antenna it came with I wasn’t receiving anything on 315 other than a rare alarm remote somewhere. A nanovna shows its only marginally okay on 433 and horrible on 315.
The antenna I got for 315 seems to be tuned around 308MHz but picks up much more on the 315MHz frequency.
I’ve not gone below 314.6MHz since everything I have pointed to it being 314.88 to 314.95 for the TPMS sensors but I can try that today.
I’ve got 2 of these LORA32 boards and both seem to exhibit identical behavior so I don’t think its the board (tho one is picking up a couple more alarm sensors from somewhere outside than the other) neither will pick up my TPMS.
I may be able to record the TPMS sensor with a Flipper and post if that helps to have a sample to play with.
I am at a loss if the code is supposed to be merged into either of those versions of OMG I tried why it isn’t decoding. I’m not sure if there’s a way to enable more verbose output for things it doesn’t decode could be useful?
I’m not really the versed with rtl_433 reception and decoding, but could it not be that the LilyGo is not actually laid out to receive at 315MHz - at least that is what a quick search suggests
Compatibility of Lilygo LoRa32 with 315 MHz
Supported Frequencies
The Lilygo LoRa32 primarily operates on the following frequencies:
433 MHz
868 MHz
915 MHz
315 MHz Reception
The Lilygo LoRa32 is not designed to receive signals at 315 MHz. It is primarily compatible with the 433 MHz band, which is commonly used for various RF devices. If you need to work with 315 MHz devices, consider using a different module specifically designed for that frequency.
Alternative Options
If you require 315 MHz support, look for RF modules or gateways that explicitly mention compatibility with that frequency. Some alternatives include:
ESP32 + CC1101: This combination can support multiple frequencies, including 315 MHz.
So an ESP32 with a CC1101 with the appropriate OMG build might be the best solution for you.
It still seems odd that I am picking up other people’s 315 MHz TPMS sensors on the LORA32 at times (It was a different model Schrader according to the decode) so I would have thought if I can pick up someone passing by on my street it should pick up the one inches away in my car when I trigger?
My searches this morning aren’t turning up anything similar that would combine those (and I really don’t have time for yet another new diy custom hardware build - I already have a dozen or so incomplete hardware builds that I don’t have time for), any list of known compatible boards on Amazon or similar?
I got the lilygo lora32 at the recommendation of several folks from Home Assistant using them instead of needing USB ports for a rtl-sdr but if I already would have to homebrew something I’ll probably stick to the sdr that is already working and just suck up that the rtl-sdr is more fragile with updates to the OS breaking software needing to rebuild configuration
Finally got it, I think the ESP32 I had was faulty or something. Finally tried the Windows dev-tool and it couldn’t read or detect the memory size so I took it apart and used a different ESP32 and flashed fine.
Though it won’t detect the TPMS sensors any better than the Lilygo TTGO was, just shows “undecoded signal”.