About Piston (OBD2 & ELM327)

Piston is the OBD II diagnostic application designed with the simplicity in mind.
The application is capable of:
- reading the live data
- showing the fault codes and clearing them
- displaying the logged freeze frame data

The application requires the OBD II Bluetooth or WiFi dongle (ELM327 based) to communicate with a car.

All the popular OBD II protocols are supported:
- J1850 VPW and PWM
- ISO 9141-2
- KWP 2000
- CAN (11 and 29 bits - both 250 and 500 kBit/s)

If you have any request, comment or suggestion, please don't hesitate to contact me.

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Frequently Asked Questions(FAQ)

What is Piston?

Piston is an OBD II diagnostic application designed for simplicity. It can read live data, display fault codes, clear them, and show logged freeze frame data.

What devices does Piston require?

Piston requires an OBD II Bluetooth or WiFi dongle (ELM327 based) to communicate with a car.

Which OBD II protocols are supported by Piston?

Piston supports all popular OBD II protocols including J1850 VPW and PWM, ISO 9141-2, KWP 2000, and CAN (11 and 29 bits - both 250 and 500 kBit/s).

How can I contact the developer of Piston?

If you have any requests, comments, or suggestions, please don't hesitate to contact the developer.

OBD2 app for bluetooth and wifi devices, simple interface - works!

Don Anderson

It connected to a cheap adapter that other apps could not see. Simple, effective; it successfully read the codes.

Marco Myer

Small, simple, elegant app with almost everything you could want in an obd reader and nothing you don't

Casey

Great app, all measurements later out in an easy, simple to read manner

Allan Mohammed

great

A Google user

Perfect

OSCAR B JAMES