Change the connection from Cat-M1 to NB-IoT

By default, the cellular connection for a Connect Sensor device is set to Cat-M1. You can change it to NB-IoT if the device is deployed in an area without Cat-M1 cellular service.

For best results, you should update the network connection option in Digi Axess first, and then on the device itself.

Step 1: Change the cellular connection type in Digi Axess

1. Access the web UI for Connect Sensor from the Device Summary page. The Automation Dashboard displays.

2. Choose Physical I/O > Cellular. The Cellular Configuration page displays.

3. Click Edit.

4. In the Modem Configuration section, click the Iot Tech list box.

5. Select the NB-IoT option.

6. Click Update to save the changes.

Step 2: Change the cellular network connection type on a Connect Sensor

Required elements

• A terminal emulator, such as Tera Term or Putty, installed on your computer.

• A USB type A to B cable to connect your computer to the Connect Sensor.

• A magnet to wake the device.

• You must be physically close enough to the device to connect your computer to the device and wake it with the magnet.

To change the connection type to NB-IoT on the device:

1. Use the USB cable to connect your computer to the device.

   1. Connect the type A end of the USB cable to the USB port on your computer.

   2. Connect the type B end of the USB cable to the mini USB port on the device.

2. Open the terminal emulator on your computer.

3. Open a connection to the USB port on the device. Use these settings:

   • Connection port: Connect to the COM port associated with the USB cable connected to Digi Connect Sensor

   • Baud rate or bits per second: 115200

   • Data: 8 bit

   • Parity: None

   • Stop: 1 bit

   • Flow control: None

4. Use the magnet to wake the Connect Sensor.

5. Type the CLI command: custom iot=nbiot

6. Press Enter.

   Note The Connect Sensor waits 30 seconds from when you pressed Enter to begin processing the command.

7. (Optional) If you entered a custom command, you can use the activate command to process the custom command immediately, rather than waiting 30 seconds.

   1. Type the CLI command: activate

   2. Press Enter.

8. When the Connect Sensor has processed the CLI command, the device goes to sleep. The following line displays in the terminal program when the device is sleeping:

   Zzz...

9. Close the terminal program.

10. Disconnect the USB cable from the Connect Sensor and the computer.