125kHz/175kHz transmitter/receiver - sth similar as CC1101

Projects Networking, Protocols, and Devices
1

Hi!

For "playing" with 433Mhz transmitting/receiving we have quite good solution CC1101.

However what to do to scan and transmit similar messages on 125/175kHz? Is there any solution which could be used with arduino/esp32? I need this for tpms sensors.

If not for arduino, perhaps you know sth for linux/pc computers which you could recommend?

2

As I understand it, the 125 kHz frequency is used by a tool to program the TPMS sensor, but the sensor transmits data to the car in the general range 315-433 MHz.

What do you want to do with the low frequency TX?

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There are two frequencies used:

  • 315/433 MHz for transmitting data from sensor to tpms module/car computer
  • 125kHz for waking up tmps sensor by tpms activation (triggering)/programming tool

I'm focusing on this second part now...

125kHz seems to have sth in common with rfid cards as its short distance technology but this transmission is not similar in format to rdif cards standard thus normal readers doesn't work (or perhaps they could work in some very low level mode if u have idea how to do this)

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