How to implement custom PIDs?

[jumpjack]

Given these data:

Name	PID	Expression	Unit	Init
Soc	229002	[B4:B5] * 0.01	%	ATSP7;ATSHDADBF1;ATFCSH18DADBF1;ATFCSM1;ATCRA18DAF1DB;

How do I implement in the source code the call to PID 229002? I.E. how do I get Service and PID from number 229002?

[jimwhitelaw]

Have a look at this example sketch. ELMduino will parse the PID for you. (FYI, it's Service:0x22 and PID 0x9002 above).
https://github.com/PowerBroker2/ELMduino/blob/master/examples/ESP32_CustomHeader/ESP32_CustomHeader.ino

[Maximize0987]

Have a look at this example sketch. ELMduino will parse the PID for you. (FYI, it's Service:0x22 and PID 0x9002 above). https://github.com/PowerBroker2/ELMduino/blob/master/examples/ESP32_CustomHeader/ESP32_CustomHeader.ino

So does jumpjack change myELM327.sendCommand("2204FE"); to myELM327.sendCommand("229002");

to get his desired input, then apply his needed math to get his desired value?

asking because I am looking for a ford transmission temp that is 221674 Thanks

[jimwhitelaw]

@Maximize0987, yes that’s correct. In your case you would call

myELM327.sendCommand("221674”);

[Maximize0987]

any help on formulas? I am hoping to include these in a sketch would the call you stated return a and b?

ModeAndPID / Name / Min / Max Unit / Formula / Header

221674 / Trans Fluid Temp / 0 / 250 F / ((A*256)+B)/8 / 0