USR IOT USR-DR502-E, Руководство пользователя

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USR-DR502-E User Manual Technical Support:
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4.2.
F rame Forming Mechanism
4.2.1.Time Trigger
When DR502-E receives data from the UART, it continuously checks the interval of two adjacent bytes. If the
interval time is greater or equal to a certain "time threshold", then a frame is considered finished, otherwise
the data is received until greater or equal to the packet length byte set. This frame is sent to the network as a
TCP or UDP packet. The "time threshold" here is the time between packages. The range of settable is
10ms~500ms. Factory default: 50ms.
This parameter can be set by AT command, AT+UARTFT=<time>.
Note: T is the packing interval time.
4.2.2.Length trigger
When DR502-E receives data from the UART, it constantly checks the number of bytes received. If the number
of bytes received is equal to a certain "length threshold", a frame is considered to have ended, otherwise the
packaging time is waiting for the end. This frame is sent to the network as a TCP or UDP packet. The "length
threshold" here is the package length. The settable range is 5~4096. Factory defaults to 1024.
This parameter can be set by AT command, AT+UARTFL=<length>.
Note: L is the packaging length.