OnCell G3111/G3151-HSPA Series
Configuring Serial Port Operation Modes
7-20
Delimiter 1 and Delimiter 2
(default=None): When Delimiter 1 is enabled, the serial port will queue the data
in the buffer and send the data to the Cellular or Ethernet port when a specific character, entered in hex format,
is received. A second delimiter character may be enabled and specified in the Delimiter 2 field, so that both
characters act as the delimiter to control when data should be sent.
ATTENTION
In order to enable a delimiter, packet length must be set to 0. Delimiter 2 should only be enabled in conjunction
with Delimiter 1 and never on its own; otherwise there may be data errors. Even when a delimiter is enabled,
the OnCell G3111/G3151-HSPA will still pack and send the data when the amount of data exceeds 1 KB.
Delimiter process
(default=Do Nothing): The Delimiter process field determines how the data is handled
when a delimiter is received. Delimiter 1 must be enabled for this field to have effect. If Delimiters 1 and 2 are
both enabled, both characters must be received for the delimiter process to take place.
•
Do Nothing:
Data in the buffer will be transmitted when the delimiter is received.
•
Del 1:
Data in the buffer will be transmitted after 1 additional byte is received following the
delimiter.
•
Del 2:
Data in the buffer will be transmitted after 2 additional bytes are received following the
delimiter.
•
Strip Delimiter:
Data in the buffer is first stripped of the delimiter before being transmitted.
Force transmit
(default=0 ms): This parameter defines how large a gap in serial communication the OnCell
G3111/G3151-HSPA will allow before packing the serial data in its internal buffer for network transmission.
As data is received through the serial port, it is stored by the OnCell G3111/G3151-HSPA in the internal buffer.
The OnCell G3111/G3151-HSPA transmits data stored in the buffer via SMS, but only when the internal buffer
is full or as specified by the force transmit time. When set to 0, the force transmit time is disabled, and
transmission is determined solely by the data in the internal buffer. At 1 to 65535, the SMS protocol software
will pack the serial data received after there is a gap in serial communication that exceeds the specified force
transmit time.
The optimal force transmit time depends on your application, but it must be at least larger than one character
interval within the specified baudrate. For example, assume that the serial port is set to 1200 bps, 8 data bits,
1 stop bit, and no parity. In this case, the total number of bits needed to send a character is 10 bits, and the
time required to transfer one character is
(10 (bits) / 1200 (bits/s))
×
1000 (ms/s) = 8.3 ms.
Therefore, you should set the force transmit time to be larger than 8.3 ms, so in this case, it must be greater
than or equal to 10 ms.
If it is necessary to send a series of characters in the same packet, the serial device will need to send that series
of characters within the specified force transmit time, and the total length of data must be less than or equal
to the OnCell G3111/G3151-HSPA’s internal buffer size.
Disabled Mode
When the
Application
is set to
Disable
, the relevant port will be disabled.
Содержание OnCell G3111-HSPA series
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