How can I update the firmware of the FC41 module? The reason for the update is that when I send the following AT commands:
“AT+QBLEGATTSSRV=FFF1\r\n”,
“AT+QBLEGATTSCHAR=FFF2\r\n”,
“AT+QBLEGATTSCHAR=FFF3\r\n”,
“AT+QBLEADVPARAM=150,150\r\n”,
“AT+QBLEADVDATA=0201060303FFF109094D41484D5554\r\n”
I either receive an error or no response at all.