flipperzero-firmware
flipperzero-firmware copied to clipboard
flipperdevices
App/SubGhz proto: support TPMS (Tire Pressure Monitoring System) ?
Description of the feature you're suggesting.
I don't know if it is relevant, but since I couldn't find any mention of TPMS already, maybe an app to decode TPMS (Tire Pressure Monitoring System) messages could be implemented, and maybe even with a "Relearn" option (https://github.com/UberGuidoZ/Flipper/tree/main/Sub-GHz/Vehicles/EL50448_-TPMS_Relearn_Tool)?
Anything else?
This is one of the things https://github.com/merbanan/rtl_433 supports, to have an implementation example.
Should be totally feasible. All APIs are available and can be implemented as external application. At the same time it's kinda niche thing, we don't plan to implement it. Maybe someone from community will.
@skotopes Any plans to implement FSK? It would be needed for TPMS, afaik flipper only supports 2FSK
2fsk is fsk. All modulations supported by CC1101 are available to user applications.
Got it. 3 out of 4 test captures are recognized as TPMS by rtl_433, 4th likely missed a few bits. No other signals were captured. Only implemented the modulation for Toyota ATM, and haven't even touched writing a decoder
@u1735067
If anyone cares here is the modulation for Toyota PMV_107J TPMS
Custom_preset_name: TPMS
Custom_preset_module: CC1101
Custom_preset_data: 02 0D 07 04 08 32 0B 06 10 69 11 93 12 14 13 01 14 F8 15 40 18 18 19 16 1B 07 1C 00 1D 91 20 FB 21 56 22 10 00 00 C0 00 00 00 00 00 00 00
Using a custom fw is recommended as you will need extended freqs to utilize 314.98Mhz. Detect Raw is also needed because there is no decoder for TPMS (and you don't want to be recording a straight raw signal with the OFW). It also needs to be very close to the tire to detect since we don't have a big antenna like an rtlsdr. I basically was only able to detect 1-2 wheels sitting in the passenger seat while driving.
I have run multiple tests (about 40ish captures in total) with this modulation/freq combo and every signal captured except one was the targeted Toyota TPMS. This was tested by replaying the captured and save Raws to rtl_433.
I can create modulations for other TPMS brands/systems if someone wants to build the decoder side on the flipper. TPMS is unencrypted, but I am not familiar enough with how the flipper firmware works to integrate at this time.
While I would love having the time to play with this (I also don't have TPMS sensors), I saw other peoples made progress, so to share:
- https://github.com/wosk/flipperzero-tpms
- https://github.com/Crsarmv7l/TPMS-Flipper
Your second link is mine ;) however mine is only to generate valid TPMS subs to transmit. That said I had seen the first one recently. I may have to take a look and see if I can modify it to tx
On Mon, Jul 31, 2023 at 6:10 PM Alexandre L. @.***> wrote:
While I would love having the time to play with this (I also don't have TPMS sensors), I saw other peoples made progress, so to share:
- https://github.com/wosk/flipperzero-tpms
- https://github.com/Crsarmv7l/TPMS-Flipper
— Reply to this email directly, view it on GitHub https://github.com/flipperdevices/flipperzero-firmware/issues/1909#issuecomment-1659258193, or unsubscribe https://github.com/notifications/unsubscribe-auth/AULD4G74O4M7AB4MVSDP4WTXTAUOJANCNFSM6AAAAAARL36SYU . You are receiving this because you commented.Message ID: @.***>
Yep, I though it might be useful to have it here too :)
And by playing with new apps, I just found that the ProtoView app (https://github.com/antirez/protoview) also implements TPMS: https://github.com/antirez/protoview/tree/main/protocols/tpms
Btw I'm surprised to see the repo associated in the catalog at https://github.com/flipperdevices/flipper-application-catalog/blob/main/applications/Sub-GHz/protoview/manifest.yml, it makes look like many app come from the same repo, while they're not actually ..
I think at this point we are not going to implement it as a part of firmware.