README.md

ArduinoHondaOBD_Extra (based on the original by kerpz)

An arduino code that reads Honda OBD Protocol and translates it to ELM327 protocol. This fork will add three Dallas DS18B20 temperature sensors to the system created by kerpz. The sensors output will be available on the LCD as a second screen OR will be spliced into the OBD data sent to the OBD2 conversion routines.

Supports

• Honda ECU's before 2002
• This fork will be tested on a 1999 Honda S2000 used for track days.

Files

• hobd_uni - implements Honda OBD with ELM OBD2 protocol (bluetooth) and LCD display
• LCD_wiring.png - LCD wiring for arduino uno (10k potentiometer)

Wiring for hobd_uni (Joined ELM and LCD codes)

Honda 3 Pin DLC           Arduino Uno
Gnd --------------------- Gnd
+12 --------------------- Vin
K-line ------------------ Pin12

HC-05 Bluetooth           Arduino Uno               
Rx ---------------------- Pin11
Tx ---------------------- Pin10

LCD 16x2                  Arduino Uno               
RS ---------------------- Pin9
Enable ------------------ Pin8
D4 ---------------------- Pin7
D5 ---------------------- Pin6
D6 ---------------------- Pin5
D7 ---------------------- Pin4

Wiring for hobd_elm (Deprecated use hobd_uni)

Honda 3 Pin DLC           Arduino Uno
Gnd --------------------- Gnd
+12 --------------------- Vin
K-line ------------------ Pin12

HC-05 Bluetooth           Arduino Uno               
Rx ---------------------- Pin11
Tx ---------------------- Pin10

TODO

• Upload alpha version
• Code tidy-up ;)