ADC on the STM32WL5MOC module not working

[JoeGordon]

Hi Community!

Currently working with the STM32WL5MOC module on my custom board.

I'm trying to work with the ADC but getting values like the fallowing and not changing even when i connect the ADC signal to ground. 

light: 1366
light: 1367
light: 1367
light: 1366
light: 1367

I'm using default configuration for the ADC, and using the STM32cube

this is the code I'm using 

  while (1)

  {

  HAL_ADC_Start(&hadc);

  HAL_ADC_PollForConversion(&hadc, HAL_MAX_DELAY);

     lux = HAL_ADC_GetValue(&hadc);

     sprintf(msg, "light: %hu \r\n",lux);

     HAL_UART_Transmit(&huart2, (uint8_t *)msg, strlen(msg), HAL_MAX_DELAY);

     HAL_Delay(500);

  }

Thanks in advance