Thanks @ESP_Sprite. You were right, the issue is solved with another USB cord
I spent hours searching for code errors !

HI I'm debugging a project that uses WLAN in the usual way: def do_connect(): import network wlan = network.WLAN(network.STA_IF) wlan.active(True) if not wlan.isconnected(): print('connecting to network...') wlan.config(reconnects=0) wlan.connect('myEissd', 'MyPwd') while not wlan.isconnected(): pri...