- Micro USB cable to salvage
- A USB ttl cable, This cable from adafruit is what I recommend
- Cut the usb cable and seperate the wire pairs on the micro USB side, scrap or reuse the other side.
- Wire the cable as follows
VBUS: 5 Volts DC
D-: TX
D+: RX
GND: GND
if wired correctly, the cable should work with both modified and official software.
If is important to note that the DFM17's original software requires the use of the Grawmet configuration protocol, I can't link a copy of Grawmet, but some google searches are all you need to find it.