The sim module block consists of 2 main parts: 908The SMS part: have the task of communicating and getting commands from the user's mobile phone via the GSM technology. Then move the command received for VDK through serial interface USART. After receiving the command from the commands it sends back for VDK users via SMS.GPS section: have the task of determining the coordinates of the device in the GPS global positioning system. The value to be sent back for VDK order request.
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