nrf9160 hardware

[Mac-fang]

嗨，

 我正在测试NRF9160，但找不到SIM卡。而且我发现SIM_1V8的引脚为低。我怎样才能打开它？它由3V3供电。

[Amanda Hsieh]

Hi, 

Do you mean the board cannot detect the SIM card and the SIM_1V8 pin is low? Are you using nRF91 DK or the custom board? 

Are you able to get 1.8 volt in the sim slot?

Could you test with the at_client sample (or Testing a prebuilt application for DK), and check what AT%XSIM? returns?

Do you get any errors code?

Also, check that the SIM-card is inserted correctly in the SIM socket. Some sockets allow the SIM-card to be inserted 2 different ways, but only one way works. And then you need to take the SIM-card out, turn it 180 degrees, and put it back in the socket again. 

nRF9160 DK Getting Started might help. 

-Amanda H.