Having problems with an HL7800.
The module is not able to talk to the SIM.
No power seems to be getting to it from UIM1_VCC.
UIM1_DETECT is tied high via a 100k resistor. No difference if tied directly to 1.8V
I also get strange results when asking about the SIM
According to the AT reference, I should get either…
or +CME ERROR:
But all I get is a single word ERROR
I also tried to manually feed the SIM card with 1.8V…….but nothing.
Any help would be appreciated.