I have recently bought an OVMS 3 module and an EU modem add on. When the vehicle module is booted, there is only limited chance that the modem module will also start up. This behaviour was seen when the unit was powered by usb during initial set up but I assumed that the external power requirements for the module were exceeding my USB supply however, the behaviour is exactly the same when powered from the OBD port after installation in the car.
Rebooting the unit will not cause it to start up.
I have also discovered that pressing the button on the modem module will cause it to start up correctly. Clearly pressing the button when the unit is installed in the car is not very convenient and I am sure this is not the expected behaviour.
Power cycling the vehicle module can also result in a correct startup but as noted earlier, it can take multiple tries to get it all up and running.
Has anyone experienced any startup issues with the modem module?
Any help would be appreciated.