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→Photos: Add another image showing a better view of the underside of the PCB
File:DFM-17 Battery Holder.jpg|The bottom side of the PCB in the DFM-17
File:DFM-17 NOAA Label.jpg|The label sticker NOAA(US) puts on the back of their DFM-17 radiosondes
File:Dfm17-2layers.png|A view of the DFM-17 Radiosonde showing both layers to better assist tracing connections while reverse engineering the hardware.
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The board will communicate with the official GRAWMET software using this approach. Reverse engineering of the port's protocol is underway, however it is believed to use a similar, if not the same protocol the [https://www.graw.de/products/radiosondes/ps-15/ PS-15] uses.
== Hardware modifications ==
[[File:Modified DFM-17 Radiosonde.jpg|thumb|332x332px|MrARM's modified DFM-17 with a SWD connector and a SMA antenna.]]
The DFM-17 has solder pads for an SMA port and a SWD header.
