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 at+ccid? ERROR According to …

HL7800 no power to SIM

Sierra_klin2 June 28, 2019, 5:21am 12

Please remove .z in the filename and unzip it.

HL7800 Firmware update