Digi XBee3 Cellular LTE-M/NB-IoT Global Smart Modem User Guide
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Cellular network 118
Data network connection 118
Data communication with remote servers (TCP/UDP) 118
Disconnecting 119
Modes
Select an operating mode 121
Transparent operating mode 122
API operating mode 122
Command mode 122
Enter Command mode 122
Troubleshooting 123
Send AT commands 123
Response to AT commands 123
Apply command changes 124
Make command changes permanent 124
Exit Command mode 124
MicroPython mode 124
USB direct mode 125
Configure the data pins 125
Enable USB direct mode 125
Bypass operating mode (DEPRECATED) 125
Enter Bypass operating mode 126
Leave Bypass operating mode 126
Restore cellular settings to default in Bypass operating mode 126
Sleep modes
About sleep modes 128
Normal mode 128
Pin sleep mode 128
Cyclic sleep mode 128
Cyclic sleep with pin wake up mode 128
SPI mode and sleep pin functionality 128
The sleep timer 129
MicroPython sleep behavior 129
Power saving features
Airplane mode 131
Power Saving Mode (PSM) 131
PSM behavior 131
Deep Sleep mode 131
Serial communication
Serial interface 134
Serial data 134
UART data flow 134
Serial buffers 135
CTS flow control 135
RTS flow control 135
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