USR-G760c User Manual
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3.3.2. Length Frame
When USR-G760c receive data from UART, it will keep checking the received number of bytes. If the
number of bytes is greater than or equal to a “length threshold”, the frame is finished. Then module will send
this frame to network by TCP or UDP packet. The “length threshold” here is packet length, range from 1-1000,
default 1000.
This can be set by AT command: AT+UARTFL=<length>
3.4. Features
3.4.1. Registration Packet Function
When USR-G760c send network data, it can add some additional information to realize some special
functions. These additional information will be sent when establish TCP connection, or be insert into the front
of data packet.
Registration type: ICCID, MEID, CLOUD and USER
ICCID: The unique identifier of SIM card, suitable to the application based on SIM card identification.
MEID: The unique identifier of DTU, suitable to the application based on device identification, which
has nothing to do with installed SIM card.
CLOUD: The identification code based on USR CLOUD platform. By related parameters that have
access permission can realize USR CLOUD function.
USER: User defined data, suitable for user custom registration data.
3.4.2. Synchronize Baud Rate
This function is similar to RFC2217, that is to modify serial parameters from net side automatically. This
modification is temporary, will restore original parameters after restart.
Protocol Instructions
Protocol length is 8 bytes, detailed protocol as follows, example in HEX:
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