yangosoft/dpf

Display DPF info using ESP32 and ELM327

Diesel Filter Particle viewer

Only tested in a Volkswagen 2.0 TDI CAGA engine.

The code is mostly based on https://github.com/fkoca5055/obdESP with some changes to check DFP status, provide a WiFi Access Point to change Bluetooth device, PIN, debug viewer...

Please note: as I'm not having so much time to spend on this project the code is quick and dirty.

Needed parts

• ESP32 NodeMCU ESP-32s
• TFT Screen based on ILI9341
• ELM327 Bluetooth

Box and schema

• PCB designed with EAGLE.
• Box to 3d print designed with FreeCAD.

Pinout

TFT	ESP32 GPIO
TFT_CS	15
TFT_DC	4
TFT_MOSI	23
TFT_SLK	18
TFT_RST	2
TFT_LED	-1
TFT_MISO	19

Please change TFT_RST to another GPIO since this the integrated led in NodeMCU ESP-32s.

Next steps

Remove the screen and make use of the FIS to display DFP information

Useful links

• https://stackoverflow.com/questions/23877761/sniffing-logging-your-own-android-bluetooth-traffic
• https://forums.tdiclub.com/index.php?threads/reading-soot-level-with-torque.464119/page-4
• https://github.com/fkoca5055/obdESP/blob/master/2.4_LCD.ino
• https://www.cardumps.net/account/my-profile
• https://stackoverflow.com/questions/23877761/sniffing-logging-your-own-android-bluetooth-traffic
• http://jakubdziworski.github.io/obd/bluetooth/arduino/car/2020/07/13/arduino-obd-dpf-monitor-insignia.html
• http://www.areavag.com/foro/showthread.php?42159-Regeneraci%F3n-filtro-part%EDculas-diagnosis-con-iPhone/page3
• https://gist.github.com/0/c73e2557d875446b9603
• https://stackoverrun.com/es/q/12573350
• http://jakubdziworski.github.io/
• https://scribles.net/setting-up-bluetooth-serial-port-profile-on-raspberry-pi/
• https://forum.fairphone.com/t/location-of-btsnoop-hci-log-file/60320
• https://www.fte.com/WebHelpII/Sodera/Content/Documentation/WhitePapers/BPA600/Encryption/GettingAndroidLinkKey/RetrievingHCIlog.htm
• https://stackoverflow.com/questions/23877761/sniffing-logging-your-own-android-bluetooth-traffic
• https://github.com/fkoca5055/obdESP
• https://github.com/ibanezgomez/FISBlocks

dpf's Issues

Question about values

Hi. I ported yours code into Arduino and it works pretty well (but it's more dirty :) )
I can't figure, why I'm getting few values (and I'm not sure it's a problem with code or PIDs).

• turboPRESS always show value >=1.0 (even when engine is off, it showing 1.0)
• oilTemp show always -30 (even FIS showing >70)
  and the bigger mess, is when I try call getSMC() - everywhere I got wrong values (like 2524 for RPM when I don't touch throttle) - for few second I see good values.
  I'm working with Audi A4 B8 (CNHA engine)