Loco Function are not working

[Heclo]

When trying to activate decoder functions in either the web interface or JMRI; nothing happens.
No response from decoder, no activity in serial monitor.
JMRI DCC++ traffic monitor shows correct command when function button is pressed.

Tested with: arduino motor shield, ESP32 devkit1, 15V psu, ESU loksound 4

Config_MotorBoard.h configured like this:
`// MAIN TRACK MOTORBOARD NAME
#define MOTORBOARD_NAME_OPS "OPS"
// MAIN TRACK NOTORBOARD ENABLED PIN
#define MOTORBOARD_ENABLE_PIN_OPS 27
// MAIN TRACK MOTORBOARD CURRENT SENSE ADC PIN
#define MOTORBOARD_CURRENT_SENSE_OPS ADC1_CHANNEL_5
// MAIN TRACK MOTORBOARD MOTOR_BOARD_TYPE
#define MOTORBOARD_TYPE_OPS ARDUINO_SHIELD

// PROG TRACK MOTORBOARD NAME
#define MOTORBOARD_NAME_PROG "PROG"
// PROG TRACK NOTORBOARD ENABLED PIN
#define MOTORBOARD_ENABLE_PIN_PROG 25
// PROG TRACK MOTORBOARD CURRENT SENSE ADC PIN
#define MOTORBOARD_CURRENT_SENSE_PROG ADC1_CHANNEL_4
// PROG TRACK MOTORBOARD MOTOR_BOARD_TYPE
#define MOTORBOARD_TYPE_PROG ARDUINO_SHIELD

/////////////////////////////////////////////////////////////////////////////////////
//
// DEFINE WHICH PINS ARE USED FOR DCC SIGNAL GENERATION
//
// OPERATIONS TRACK DCC SIGNAL PIN
#define DCC_SIGNAL_PIN_OPERATIONS 14

// PROGRAMMING TRACK DCC SIGNAL PIN
#define DCC_SIGNAL_PIN_PROGRAMMING 26

/////////////////////////////////////////////////////////////////////////////////////
//
// DEFINE THE CURRENT SENSE ATTENUATION. THIS IS USED BY THE ADC SYSTEM TO SCALE
// THE CURRENT SENSE VALUES BASED ON THE MOTOR SHIELD.
//
// SUPPORTED VALUES: ADC_ATTEN_DB_11, ADC_ATTEN_DB_6, ADC_ATTEN_DB_2_5, ADC_ATTEN_DB_0
//
// IF LEFT UNDEFINED ADC_ATTEN_DB_11 WILL BE USED.

#define ADC_CURRENT_ATTENUATION ADC_ATTEN_DB_6

/////////////////////////////////////////////////////////////////////////////////////`