I have downloaded STM32CubeExpansion_BLE1_V3.2.0 and loaded DMALowPower_App as server on my nucleo board (NUCLEO-L073) that is compatible with L052. Then, with my phone and the "STM32 BLE Profile App" application, i was able to see my blueNRG device. But when i power down and power up my board again, i wasn't able to see my device anymore. I tried with another board, and this is the same thing at second startup.
tried to update the firmware of the chip but it didn't change anything.
Do you think it could come from my phone (that is a cheap chinese Archos phone)