USB-TTL module can realize the communication between the module and the computer.
Contains a set of mobile phone lithium battery power interface;
Contains 2 LED indicators, convenient debugging;
Contains a MICRO SIM card holder;
Contains a TTL serial port, compatible with 2.85V, 3.3V, 5V system;
Support SMS, telephone, GPRS data, support HTTP protocol, support DTMF decoding, support MMS, support recording functions, and so on;
Because the module function is too powerful, please do not use it as a tracker, bug, etc.
Suitable for foreign trade and project crowd;
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