pip install https://github.com/pyinstaller/pyinstaller/tarball/develop

python ir2mqtt.py

pyinstaller --clean -F --add-binary "<your python path>\Lib\site-packages\timezonefinder;timezonefinder" ir2mqtt.py

[DEFAULT]

[global]
# Generates additional debug output. All MQTT and serial communication will be 
# logged. Comment out or set to yes/True to enable
debug = no

# Serial communication port to send data to. Comment out to disable serial
# communication
;serial = COM3

# Uncomment to start the application using a data dump file from irsdk for 
# testing/development purposes. The dump file can be created by issuing the 
# command 'irsdk --dump data.dmp'
;simulate = data/limerock-q.dmp

[mqtt]
# Hostname of a MQTT broker to connect to. Comment out to disable MQTT 
# communication.
host = localhost

# TCP port on which a MQTT broker is listening. Default is 1883.
port = 1883

# MQTT topic prefix to use when publishing values - see section [iracing]
baseTopic = /sensors/iRacing

# Timezone used to publish the simulations TimeOfDay
timezone=CET

[iracing]
# Mapping of irsdk values to MQTT topics.
# Format: mqttTopic = irsdkField
# The configuration key (mqtt topic is prepended by the baseTopic configuration 
# value). So a configuration line
#
# eventType = WeekendInfo/EventType
#
# will post the EventType value from the iRacing WeekendInfo data structure on
# the MQTT topic '/sensors/iRacing/eventType'
#
# For accessing list structures (e.g. Sessions in SessionInfo) you have to use 
# array notation:
#
# sessionType = SessionInfo/Sessions[0]/SessionType
#
# You can use 'last' as a special index value to retrieve the last element from
# the list. 
#
# Furthermore, you may use an other telemetry value as list index. Simply 
# prefix that value with a hast mark '#':
#
# sessionType = SessionInfo/Sessions[#SessionNum]/SessionType

eventType = WeekendInfo/EventType
practiceTrackState = SessionInfo/Sessions[0]/SessionTrackRubberState
currentSessionType = SessionInfo/Sessions[#SessionNum]/SessionType

<baseTopic>/state 

<baseTopic>/ToD 

%Y-%m-%dT%H:%M:%S<+/-ffff>

2019-03-02T12:00:00+0200

<baseTopic>/lightinfo

<baseTopic>/solarElevation

*KEY=VALUE#

*PFL=<int>#   (outbound)
*PFU=<int>#   (inbound/outbound)
*PCM=<int>#   (inbound)

lf_tire_change     = 0x01
rf_tire_change     = 0x02
lr_tire_change     = 0x04
rr_tire_change     = 0x08
fuel_fill          = 0x10
windshield_tearoff = 0x20
fast_repair        = 0x40

irsdk.pit_command(PitCommandMode.fuel, <telegramValue>)

irsdk.pit_command(<telegramValue>)

clear       =  0 # Clear all pit checkboxes
ws          =  1 # Clean the winshield, using one tear off
fuel        =  2 # Add fuel, optionally specify the amount to add in liters or pass '0' to use existing amount
lf          =  3 # Change the left front tire, optionally specifying the pressure in KPa or pass '0' to use existing pressure
rf          =  4 # right front
lr          =  5 # left rear
rr          =  6 # right rear
clear_tires =  7 # Clear tire pit checkboxes
fr          =  8 # Request a fast repair
clear_ws    =  9 # Uncheck Clean the winshield checkbox
clear_fr    = 10 # Uncheck request a fast repair
clear_fuel  = 11 # Uncheck add fuel

String readTelegramFromSerial() {
  char buff[10];
  int dataCount = 0;
  boolean startData = false;
  while(Serial.available()) {
    char c = Serial.read();
    if( c == '#' ) {
      startData = true;
    } else if( startData && dataCount < 10) {
      if( c != '*') {
        buff[dataCount++] = c;
      } else {  
        break;
      }
    } else if(dataCount >= 10) {
      return String();
    }
  }
  if( startData || dataCount > 0 ) {
    return String(buff);
  }
  return String();
}

void processTelegram(String* telegram) {
  int idx = telegram->indexOf('=');
  if( idx > 0 ) {
    String key = telegram->substring(0, idx);
    String val = telegram->substring(idx+1);
    if( key.equals("PFL") ){
      processFlags(val.toInt());
    } else if( key.equals("PFU") ) {
      processFuel(val.toFloat());
    }
  }
}

struct PitSvFlags {
    byte lf_tire_change;
    byte rf_tire_change;
    byte lr_tire_change;
    byte rr_tire_change;
    byte fuel_fill;
    byte windshield_tearoff;
    byte fast_repair;
};
    
PitSvFlags pitFlags = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40};

struct PitCommand {
    clear;       // Clear all pit checkboxes
    ws;          // Clean the winshield, using one tear off
    fuel;        // Add fuel, optionally specify the amount to add in liters or pass '0' to use existing amount
    lf;          // Change the left front tire, optionally specifying the pressure in KPa or pass '0' to use existing pressure
    rf;          // right front
    lr;          // left rear
    rr;          // right rear
    clear_tires; // Clear tire pit checkboxes
    fr;          // Request a fast repair
    clear_ws;    // Uncheck Clean the winshield checkbox
    clear_fr;    // Uncheck request a fast repair
    clear_fuel;  // Uncheck add fuel
}

PitCommand pitCmd = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};

void sendPitCmd(int cmd) {
  Serial.print("#PCM=" + String(cmd) + "*\n");
}

void sendPitFuelCmd(int amount) {
  Serial.print("#PFU=" + String(amount) + "*\n");
}