I've Configured the FMB640 to send data to my server. I used similar configuration as with other devices (FMB001 and FMA120) which work without Issue.
The problem I have is that while the device does connect to the server, it sends nothing and then closes the connection after one second (can see that through server log). I'm aware of the protocols and the handshake procedure where the device sends over the Imei and server replies with 0x01, and it is configured like that (hence the other models do work perfectly fine)
I've used the following settings:
and here is the status:
I've been searching for a solution for a few days now but I haven't been able to resolve this. I should note I also updated the firmware to the latest one (was 3.50 and updated to 3.65) but the problem persists. I should also note that before the firmware update the device kept connecting every 10 seconds or so, but after the update it connects every few minutes or even several minutes sometimes, not sure why that is
I would appreciate any help on this matter.
Thanks for your time