DEV1 TPMS

The home for integration tire pressure monitoring system

What is TPMS?

• TPMS is a sensor within a vehicle's tires that measure the internal tire air pressure, and displays it on a panel for the driver to see

• Having a low air pressure in a tire can lead to worsened performance and efficiency, increased wear, and possible sudden tire failure

What is TPMS?

• TPMS is a sensor within a vehicle's tires that measure the internal tire air pressure, and displays it on a panel for the driver to see

• Having a low air pressure in a tire can lead to worsened performance and efficiency, increased wear, and possible sudden tire failure

• https://www.reddit.com/r/MechanicAdvice/comments/11m8zli/whats_the_difference_between_tpms_programming_and/ (Differentiation of TPMS Systems)

How we communicate? (Bluetooth, RFID, wireless communication)

https://github.com/merbanan/rtl_433 - Use this to identify and program receiver to take that specific signal

https://github.com/NorthernMan54/rtl_433_ESP 

433 MHz Signals

TPMS -> Receiver -> ESP32(rtl_433) --> CAN -> GUB

or TPMS -> Receiver -> STM32 (use rtl_433 seperately to decode the signal from the TPMS) -> CAN -> GUB

TPMS supplier: https://www.tpms.com/default.asp

Board layout

Components Necessary

• 433 MHz TPMS Sensors

• ESP32 Running RTL_433

Voltage Sources

• Some sensors have built in power, last about 7-10 years, but need a full sensor replacement after it loses charge

Basic Information

Send signal to GUB through CAN

TPMS for tires

Sensor must be for motorcycles

Internal sensor

Use Spi or I2C

Compatible with STM32

There are two different types of Tire Pressure Monitoring Systems: Indirect and Direct.

• Indirect TPMS:

  • Relies on the wheel speed sensors that the anti-lock brake system uses

  • Measures rate of revolution each wheel is making and compares it to each other

  • I.E. If one wheel starts spinning faster than expected, the computer calculates that the tire is underinflated and will indicate something is wrong.

• Direct TPMS:

  • Uses pressure monitoring sensors within each tire. It monitors the specific pressure levels

  • Sends data wirelessly

Lasts the for the life of the valve (material decomposition) or 7 years whichever comes first