void loop() {

delay(1000);

}

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Function:

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Set software serial port. SIM7000 uses the software serial port to control TX to D8, RX to D7.

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begin(Stream &s_)

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Turn ON SIM7000 in a software way then Net indicator will blink. SIM7000C will initialize for

about 2s. The function back to true when initialized successfully.

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turnON();

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Turn OFF SIM7000 in a software way then Net indicator will go out.

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turnOFF();

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Set baud rate of software serial port, SIM7000 serial port recognize 115200 baud rate in default.

So we need to reset the baud rate to 19200 and below to avoid garbled. The function back to

true when initialized successfully (other qualified baud rates are 9600, 4800, 2400, 1200).

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setBaudRate(int rate);

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Initialize AT commands and the function back to true when initialized successfully.

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checkSIMStatus();

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Set network mode and the function back to true when initialized successfully. Qualified modes:

GPRS/GPRS-NB/NB-IOT

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setNet(Net net);

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Check signal strengths, the return value is the signal strength. Return=99 means no signal can

be detected.

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checkSignalQuality();

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Start a connection service and the function back to true when connected successfully.