please, I have esp-32s sheild , and when I want to upload a program it shows me the following message:
Invalid library found in C:\Users\FADHIL\Documents\Arduino\hardware\espressif\esp32\libraries\AzureIoT: no headers files (.h) found in C:\Users\FADHIL\Documents\Arduino\hardware\espressif\esp32\libraries\AzureIoT
Invalid library found in C:\Users\FADHIL\Documents\Arduino\hardware\espressif\esp32\libraries\BLE: no headers files (.h) found in C:\Users\FADHIL\Documents\Arduino\hardware\espressif\esp32\libraries\BLE
what I works ?
These are warnings caused by you not following the installation instructions. You need to delete C:\Users\FADHIL\Documents\Arduino\hardware\espressif and then do it again, except follow the instructions this time. I recommend you to use the Boards Manager installation instead of the Git installation since this is much easier and will ensure that you are using a stable release version instead of the beta test version:
https://github.com/espressif/arduino-esp32/blob/master/docs/arduino-ide/boards_manager.md