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I have GSM/GPRS/GNSS/Bluetooth HAT for Raspberry Pi with SIM868 I want to communicate with sim card over APDU command with AT+CSIM command. The datasheet says that this at command is supported by sim868. I tried to send the following AT commands:

AT+CSIM=10,"0070000000" //Globalplatform manage channel command

+CME ERROR: unknown

AT+CSIM=26,"00A4040008A000000003000000" //Globalplatform select applet command

+CME ERROR: unknown

I have tested these commands via a card reader with the same sim card and it works, but via at command, it doesn’t.

How can I fix it?

Yan
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  • Is the use of `“` (Unicode 'right double quotation mark' (U+201D)) intentional? Is this the exact command you're attempting to send? Try replacing this character with ASCII `"` – DaV Aug 30 '20 at 17:44
  • I use right double quotation, it looks like formatter has changed. I will change not to confuse other. Thanks – Yan Aug 30 '20 at 19:48

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