Megasquirt MS2 Serial Interface
The Megasquirt MS2 serial interface is designed to work with the Megasquirt MS2 hardware, with the serial port operating at 115.2kbaud.
It has been tested with Megasquirt-2 (MS2/Extra) 3.2.5
and will also work with
Megasquirt-2 (MS2/Extra) 3.3.2 and above
Megasquirt-3 1.3.1 and above
The following messages are received.
ECU Name
| Race Technology message
| Race Technology Default name
| Race Technology VAR number
| Resolution
|
Engine speed
| Engine RPM
| RPM
| VAR_0010
| 25 RPM
|
Battery voltage
| misc 3
| Battery voltage
| VAR_4002
| 0.1 V
|
Lambda 1
| misc 1
| Lambda 1
| VAR_4000
| 0.01 lambda
|
Lambda 2
| misc 2
| Lambda 2
| VAR_4001
| 0.01 lambda
|
Injector time 1
| measured time 1
| Fuel inj 1 PW on
| VAR_2500
| 0.001 µs
|
Injector time 2
| measured time 2
| Fuel inj 2 PW on
| VAR_2501
| 0.001 µs
|
Coolant temp
| temperature 8
| Water temp
| VAR_1007
| 0.1 oC
|
Air temp
| temperature 1
| temperature 1
| VAR_1000
| 0.1 oC
|
MAP
| pressure 5
| Boost pressure
| VAR_3504
| 1 kPa
|
Ignition angle
| angle 2
| Ignition angle
| VAR_3001
| 0.1o
|
Throttle position
| aux 1
| Throttle position
| VAR_2000
| 0.1%
|
Note - Not all channels listed in the table(s) above may be available from your ECU. This can be dependent on the vehicle model & year of manufacture.