STM32 keeps SDA low.

[Koepel]

It was mentioned in the Discord channel that the SDA was kept low after a I2C read with HAL_I2C_Master_Receive(). After that, no more I2C communication is possible.

It turns out that the same bug happens with Arduino functions as well.
My test projects:

• Arduino Uno: https://wokwi.com/projects/416454390210677761
• Rasperry Pi Pico: https://wokwi.com/projects/416454423403356161
• ESP32: https://wokwi.com/projects/416454431364149249
• STM32 small board: https://wokwi.com/projects/416454402880623617
• STM32 large board: https://wokwi.com/projects/416454414236703745

The I2C signals for the Arduino Uno are perfect:

Both STM32 boards show something different:

The Master gives an ACK for that last databyte and SDA stays low.