Hi
I have the SIM800 EVB (unfortunately there doesn't seem to be a tech specs document to link to) and I've been struggling to get it connected to the GSM network. The problem is that when it looks for the network it seems to reset itself (exactly like this Modulo Sim 800L e Arduino - YouTube).
I think this is a power issue as it finds the connection and then this increases the current being drawn.
I've tried the following setups-
1.)connect the 5v and GND to the 5v and GND ports on the Arduino (the arduino being powered through the power jack)
2.)connect the 5v and GND directly to a battery pack (4 * 1.5v through a 5v UBEC)
Neither of the above works.
I'd be grateful for any input.
Thanks