Unresponsive Cellular Component In Bypass Mode; Condition; Solution; Syntax Error At Line 1 - Digi XBee 3 Cellular LTE-M User Manual

Troubleshooting

Unresponsive cellular component in Bypass mode

When in Bypass mode, the XBee Smart Modem does not automatically reset or reboot the cellular
component if it becomes unresponsive.

Condition

In Bypass mode, the XBee Smart Modem does not respond to commands.

Solution

1. Query the
is connected to the XBee Smart Modem software. If AI is 0x2F, Bypass mode should work. If
not, look at the status codes in
2. Ensure that you set
3. You can send the

Syntax error at line 1

You may get a syntax error at line 1 error after pasting example MicroPython code and pressing
Ctrl+D.
Solution
This commonly happens when you accidentally type a character at the beginning of line 1 before
pasting the code.

Error Failed to send SMS

In MicroPython, you consistently get Error Failed to send SMS messages.
Note For NB-IoT, SMS support is dependent on the network. Contact your network provider for
details.
Solution
Your device cannot connect to the cell network. The reason may be:
1. The antenna is improperly or loosely connected.
2. The device is at a location where cellular service cannot reach. If the device is connected to the
network, the red LED blinks about twice in a second. If it is not connected it does not blink; see
Associate LED
3. You SIM card is out of SMS text quota.
4. The device is not getting enough current, for example if power is being supplied only by USB to
the XBIB development board, rather than using an additional external power supply.
Digi XBee® 3 Cellular LTE-M/NB-IoT Global Smart Modem User Guide
AI (Association Indication)
AI (Association Indication)
DO (Device Options)
!R (Modem Reset) command to reset only the cellular component.
functionality.
Unresponsive cellular component in Bypass mode
parameter to determine whether the cellular component
for guidance.
bit 3 to 0 before entering Bypass mode.
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