Hi Andrew, excuse me for error in text.if i define : DEBUGGER_ENABLED = 1 #define DEBUGGER_ENABLED 1HAL_DBGMCU_EnableDBGSleepMode();HAL_DBGMCU_EnableDBGStopMode();HAL_DBGMCU_EnableDBGStandbyMode(); I2C functions are ok. I read my sensor each minutes....

Hi,i have the same problem. When Debugger is set on my soft, all is ok (debugger or not connect). But if i desactivate the debug functionnality the I2C don't work for read my sensor.What's solution did you find to resolve your problem ?ThanksPierre