1. 短路如下兩個焊點
2. 連接USB到PC
$ sudo dmesg -c [13747.670907] usb 1-3: new high-speed USB device number 14 using xhci_hcd [13747.820799] usb 1-3: New USB device found, idVendor=05c6, idProduct=9008, bcdDevice= 0.00 [13747.820804] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [13747.820813] usb 1-3: Product: QHSUSB_DLOAD [13747.820815] usb 1-3: Manufacturer: Qualcomm CDMA Technologies MSM [13747.821865] qcserial 1-3:1.0: Qualcomm USB modem converter detected [13747.821997] usb 1-3: Qualcomm USB modem converter now attached to ttyUSB0