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В описании железки вижу следующее:
3.5.2 SLEEP mode (Slow Clocking mode)
You can use DTR signal to control SIM100C module to enter or exit the SLEEP mode in your
applications.
When DTR is in high level, at the same time there is no on air or audio activity is required and no
hardware interrupt (such as GPIO interrupt or data on serial port), SIM100C will enter SLEEP
mode automatically. In this mode, SIM100C can still receive paging or SMS from network.
In SLEEP mode, the serial port is not accessible.
3.5.3 Wake up SIM100C from SLEEP mode
When SIM100C is SLEEP mode, the following method can wake up the module.
Enable DTR pin to wake up SIM100C;
If DTR Pin is pull down to a low level,this signal will wake up SIM100C from power saving
mode.
Receive a voice or data call from network to wake up SIM100C;
Receive a SMS from network to wake up SIM100C if the setting of “AT+CNMI” is
“AT+CNMI=2,1” (display URC when SMS is received);
RTC alarm expired to wake up SIM100C;
1. Не знаю, что имеется в виду под словом paging (ну очень интересно)
2. Не понимаю, как выводить из этого режима после автоматического вваливания при DTR=HIGH. (Кроме как нагло передернуть этим самым DTR)
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