[STEVAL-IOM001V1] Cannot establish IO-Link communication with external sensor (Wenglor P3PC012)

[Paolozz]

Hello everyone,

I am trying to establish IO-Link communication between the P-NUCLEO-IOM01M1 (STEVAL-IOM001V1 + NUCLEO-F446RE) and an external IO-Link sensor, the Wenglor P3PC012 (COM3, 230.4 kbaud), using the STSW-IOM001 firmware.

Hardware setup:

• STEVAL-IOM001V1 powered with 24V on CN1
• Sensor connected on CN3: L+ on pin 1, GND on pin 3, CQ on pin 4
• NUCLEO-F446RE connected via USB to PC

What works so far:

• I2C communication with L6360 confirmed working (LED1/LED2 registers write correctly, LEDs blink as expected)
• L+ enable working correctly
• Configuration register writable (CQ Push-Pull mode)

What I am trying to do:

1. Read process data (distance measurement) from the sensor

Any advice or working example code would be greatly appreciated. Thank you.