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User Manual for “LM068_BLE_Peri_0204” FW
iv. Flow control set command: “AT*FLOW=ON” (Set adapter flow
control ON)
v. If the user is changing the flow control of device, after accepting
command with OK response, LM device shows report as
“REP*:FLOW_CHANGE= IN_Progress”
vi. LM device will perform reboot in changed flow control mode
vii. If LM device is in flow control OFF mode and user gives command
to make the flow control OFF, then it will respond as OK but shall
not perform reboot. Similar applies to flow control ON setting.
7.3.5 “AT*UARTCONF”\r\n:
i. Query and set command.
ii. UARTCONF query command: “AT*UARTCONF=?”\r\n
iii. UARTCONF query report:
“REP*:UARTCONF=UART_THROUGHPUT” (Default setting of
UART configuration is Maximum UART throughput)
iv. “REP*:UARTCONF=LATENCY” (User can change the UART
configuration to Low-Latency)
v. UARTCONF set command: “AT*UARTCONF=LATENCY” or
“AT*UARTCONF=throughput”.
vi. When the UART configuration is set to Throughput, the UART is
configured to transfer the block of data (upto 8K blocks), UART
waits for considerable data to be available on UART before
transferring it to the remote device over SPP.
vii. When the UARTCONF is set to LATECNY, the UART is configured
to deliver the data received on UART as soon as possible to the
remote device to make sure low latency while data transfer over
Bluetooth.
viii. The UART configuration as Latency is applicable for the
EPOS/small printer customers where timing of data transfer is
important, and the strings are small up to 64 bytes.
ix. The Throughput configuration of UART is applicable for the users
which use SPP to transfer large blocks of data e.g. to send the
data continuously or in large chunks.
x. If the UARTCONF setting is Throughput and user issues command
to make the setting as Throughput, then ERR response is received
otherwise OK response is received. Same thing applies for Latency
setting.
xi. When user changes the UART configuration, device reboots itself
to apply new configuration.
xii. AT*RESET=2 does not reset the UART configuration setting.
xiii. Refer below scenario
at*UARTconf=?at*UARTconf=?
OK
REP*:UART_CONFIG=UART_THROUGHPUT
at*UARTconf=throughputat*UARTconf=throughput
ERR
at*UARTCONF=Latencyat*UARTCONF=Latency
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