List of PIDs and calculations to retrieve Fiat 500e (2020 version) information from OBD

500ePIDsCals.js

var command = [
  "ATZ", 
  "ATD", 
  "ATE0", 
  "ATS0", 
  "ATAL",
  "ATH0",
  "ATSP7",
  "ATCP18"
];

var command = [
  "ATSHDA44F1",
  "ATFCSH18DA44F1",
  "ATCRA18DAF144",
  "22A029",
  "22A010",
  "22A009",
  "22A011",
  "22A00A",
  "22A042",
  "ATSHDA40F1",
  "ATFCSH18DA40F1",
  "ATCRA18DAF140",
  "22013C"
];


// SOH calc
// > 22A029
// 00A
// 0:62A029F9FFOO
// 1:04B00493000000
// ahrTotRead = [1][0-3]
// ahrResRead = [1][4-7]
var ahrTotRead = parseInt("04B0", 16)/10;
var ahrResRead = parseInt("0493", 16)/10;

var REAL_SOH = Math.round((ahrResRead/ahrTotRead)*1000)/10;
console.log("REAL_SOH: ", REAL_SOH);

// SOC
// > 22A010
// 009
// 0:62A0106D6D6C
// 1:6E6C6B00000000
// SOC [0][10-11]
var SOC = (parseInt("6C", 16)/255)*100;
console.log("SOC: ", SOC);

// VOLT MIN & MAX
// > 22A009
// OOF
// 0:62A009390F0E
// 1:350E3101108013
// 2:80120000000000
// voltMax [0][10-11] [1][0-1]
// voltMax [1][2-5]
var voltMax = parseInt("0E35", 16)/1000;
var voltMin = parseInt("0E31", 16)/1000;
var voltDelta = voltMax - voltMin;
console.log("voltMax: ", voltMax);
console.log("voltMin: ", voltMin);
console.log("voltDelta: ", voltDelta);

// BATERY TEMP
// > 22A009
// 00F
// 0:624009390F0E
// 1:360E3101108013
// 2:80120000000000
// baterytempRead [1][12-13]
var baterytempRead = parseInt("13", 16);
if(baterytempRead >= 128 ){
  baterytempRead = baterytempRead - 256;
}
var bateryTemp = baterytempRead;
console.log("bateryTemp Celsius: ", bateryTemp);

// VOLT
// > 22A011
// 022
// 0:62A0110DA20D
// 1:A10DA0125FOCDA
// 2:0CC60B8F0CCBOC
// 3:C60CC50CC70D9F
// 4:04125F0B8F125E
// VOLT [1][2-5]
var VOLT = parseInt("0DA0", 16)/10
console.log("VOLT: ", VOLT);

// AMPERE
// > 22A00A
// 62A00A80108039
// AMPERE [6-9]
var AMPERE = ((parseInt("8010", 16)-32768)/20);
console.log("AMPERE: ", AMPERE);

// OBD VOLT
// > 22A042
// 62A0423723
// obdVolt [6-9]
var obdVolt = parseInt("3723", 16)/1000;
console.log("obdVolt: ", obdVolt);

// AMBIENT TEMP
// > 22013C
// 62013C70
// ambientTemp [6-7]
var ambientTemp = (parseInt("70", 16)/2)-40;
console.log("ambientTemp Celsius: ", ambientTemp);


KW = Math.round((VOLT*AMPERE)/100)/10;
console.log("KW: ", KW);

@MrPoofy for wrong SoC we have more values we can try:

// SOC
// > 22A010
// 009
// 0:62A0106D6D6C
// 1:6E6C6B00000000
// SOC [0][10-11]

In that sequence we have 6D, 6C, 6E, 6B which are all pretty close together and would translate to
6B->107 = 41,96%
6C->108 = 42,35%
6D->109
6E->110 = 45,08%

As the values below 50% should be a bit higher than what the BMS shows (in this case 6C), one of the other values could actually be display soc. I think the best way to find out is to go as low as possible (5-10%) and compare all these values to display, and do the same for 90-100%

But doing it in the low range should actually already provide a good insight on which one is the correct one.

Hi @SamuelBrucksch!

I will see what i can do! It will take a bit, i'm out of town at the moment but next week i can check the values.

Hey @MrPoofy

thanks, if you are on it please try somethign else too:

  "ATSHDA40F1",
  "ATFCSH18DA40F1",
  "ATCRA18DAF140",

Some dongles do not support the long ATCRA commands, in that case we need to use ATCP18 before i think. So this one should be

  "ATSHDA40F1",
  "ATCP18",
  "ATFCSHDA40F1",
  "ATCRADAF140",

If i remember correctly. CP18 should be the default though and i think we can omit it completely:

  "ATSHDA40F1",
  "ATFCSHDA40F1",
  "ATCRADAF140",

Could you please check that?

Hi @SamuelBrucksch!

I took a look at the list of PIDs that i had previously and "ATCP18" was there, i would say that we can add it as well to the list.

From the old list:
var init_command = [ "ATWS", "ATWS", "ATWS", "ATE0", "ATI", "AT@1", "ATAT1", "ATH1", "ATL0", "ATS0", "ATAL", "ATSP7", "ATCP18", "ATSHDA40F1", "ATFCSH18DA40F1", "ATFCSD300000", "ATFCSM1", "ATCFC1", "ATCAF1", "ATCRA18DAF140" ];

Do you see anything that could also help us?

Yes let's include the ATCP18 again, as that could have an influence on the ATSH command:

Many of the others are for formatting, but i'll check again if any of these is relevant.

@MrPoofy for wrong SoC we have more values we can try:

// SOC
// > 22A010
// 009
// 0:62A0106D6D6C
// 1:6E6C6B00000000
// SOC [0][10-11]

In that sequence we have 6D, 6C, 6E, 6B which are all pretty close together and would translate to 6B->107 = 41,96% 6C->108 = 42,35% 6D->109 6E->110 = 45,08%

As the values below 50% should be a bit higher than what the BMS shows (in this case 6C), one of the other values could actually be display soc. I think the best way to find out is to go as low as possible (5-10%) and compare all these values to display, and do the same for 90-100%

But doing it in the low range should actually already provide a good insight on which one is the correct one.

Hi @SamuelBrucksch!

Sorry about the delay but i was able to create a list with the displayed SOC and the calculated SOC retrieved from the OBD2 port.

I checked the other values from the response and none seem to be the display SOC but you can see here https://docs.google.com/spreadsheets/d/10EZMmmperrv-VWa_TjmzG5to68-SZ6KpvF6UFSXJ0Ck/edit?usp=sharing the deltas between the 2 values.

Nice, thanks for the comparison, i'll use your values then to calculate a proper offset.