I have a BMV702 and a solar controller 100/30.both with Bluetooth dongles. The batteries on this system died and have been dead for about six months. I installed a new fully charged battery today, removing the dead batteries. Now Both dongles are flashing both lights rapidly. I tried to update firmware using latest Victron Connect app and it timed out during upgrade. On both dongles. I Used my Samsung Note 20 Ultra. I even tried loading the Victron Connect app on my MacBook and I got the same error. Timed out. How can I upgrade my firmware? Is this a common problem? Spent $100 on these two dongles now both won't work at all because Victron connect app is making. E update firmware which fails over and over. Thanks.
