EC20 TCP/IP指令例程

串口已經調試通過；EC20 TCP/IP指令例程 具體指令如下 /* Use AT+CPIN?/AT+CREG?/AT+CGREG? to query the SIM status and network registration status */ [2015-09-14 13:56:10:185_S:] AT+CPIN? [2015-09-14 13:56:10:208_R:] AT+CPIN

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