My Bluetooth dongle arrived Friday and I installed it that evening. I downloaded the app from the Google Play store, and installed it on my phone. As the printed instruction indicated, the app identified the items in my network, the SG200 battery gauge, the shunt, and the dongle itself. Going into the device list in the menu on the app, it showed that the SG200 and the shunt both needed software updates. The instructions warned that the process could take while, and I selected the SG200 to update first. The download took about 4-5 minutes, and the installation another 2-3, during which the gauge rebooted a couple of times. The gauge then displays a message that says app is connected, and the button on the gauge does nothing while the app is connected. The information normally on the gauge can be read in the app while connected. To restore gauge function, the gateway needs to be disconnected using the app. Unfortunately at this point in the process things did not go as expected. My intention was to next update the shunt, however after the gauge updated, the app would not longer find the gateway and connect. I tried restarting the app, clearing data and cache in the app, and finally force quitting the app, to no avail. I ended up disconnecting the dongle from the gauge, and disconnecting the shunt from the gauge, then reconnecting everything (went through variations of this process a few times over about 25 minutes) and was finally able to connect and update the shunt. At this point it is hopefully just too early to tell if the updates solved my original issue because early indications are that the gauge is behaving the same way - rapid discharge indicated by the SOC, even though voltage is reported (accurately) as being 12.6 or higher. Perhaps taking the batteries through a couple of discharge/charge cycles will clear this up with the new software. Sadly, we have to haul out this Friday so we may not get a good real world test until next season.