Hardware Flow Control In Bypass Mode; Baud Rate In Bypass Mode; Socket Leaks; Condition - Digi XBee 3 Cellular LTE-M User Manual

Troubleshooting
of the product label.

Hardware flow control in Bypass mode

Support for hardware flow control in Bypass mode is available with version L0.0.00.00.05.08,A.02.04 of
the SARA-R410M cellular component. Digi recommends that you update to at least firmware
version L0.0.00.00.05.08,A.02.04 of the cellular component
Manager) and firmware version 11414 of the XBee Smart Modem.
Note Earlier versions of the SARA-R410M firmware did not support hardware flow control. The lack of
hardware flow control may lead to data loss while in Bypass operating mode during periods of high
UART traffic.

Baud rate in Bypass mode

If you change the AT+IPR setting of the cellular component away from its default you will lose
communication with the cellular component while in Bypass mode.
In firmware version *14 and later, the
control the baud rate to the cellular component. If you change the baud rate of the cellular
component using the AT+IPR setting you will need to match it with the IB setting to maintain
communication.
Note Digi does not recommend using bypass mode. You should use

Socket leaks

This applies to devices with the u-blox SARA-R410 cellular component used in the XBee 3 Cellular LTE-
M Global Smart Modem.

Condition

There are instances where a socket leaks when closing a connection while there is pending RX data.
This state is reported whenever the number of leaked sockets causes an inability to create a new
connection.
For Transparent and API modes the XBee Smart Modem returns specific status responses to describe
that you need to perform a hard reset to recover the leaked sockets. These statuses are:
Digi XBee® 3 Cellular LTE-M/NB-IoT Global Smart Modem User Guide
(using a serial port
IB (Cellular Component Baud Rate)
Hardware flow control in Bypass mode
or from Remote
command was added to
USB Direct mode instead.
315