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Components

The NB | DEV KIT hardware consists of two boards:

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Both boards are plugged in together via header pins. The following figure shows the complete NB | DEV KIT and its components.

EX-EVL210 USB/RS232 serial adapter board

UART Interface selection

The EVL210 has three serial UART interfaces, which can be used to interact with the EX-COM210 NB-IoT board:

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Peripherals

The reset button triggers a hard reset of the EX-COM210 NB-IoT board. Any state of the microcontroller and the NB-IoT modem will be reset, therefore a (Re-)Attach is needed.

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• LED1 indicates the power status of the EX-COM210 board
• LED2 indicates if the microcontroller is updating its status; in normal situations the LED should blink every second
• LED3 indicates if the NB-IoT modem is attached to a NB-IoT cell (LED on = attached, LED off = detached)
• LED4 indicates if a modem procedure (attach, transmit, receive, ...) is ongoing

The EX-COM210 NB-IoT communication board

• Microcontroller
  • Controls the modem
  • Communicates with user via UART interface
• NB-IoT Modem
  • Attaches device to NB-IoT nework
  • Transmit & receives data via NB-IoT network
  • Reads cell information (if attached)
• Micro SIM card slot
  • Micro NB-IoT SIM card to be inserted to be able to attach to NB-IoT network
  • Cut corner of SIM card to be positioned in the left bottom corner of the card slot
• SMA Antenna connector
  • Attach antenna to be able to transmit and receive NB-IoT signals

UART Interface

When using the UART interface to communicate with the device, then the following parameter shall be used:

EX-COM210 Stand-alone usage

The EX-COM210 can be used as a standalone device when unplugged from the EX-EVL210. Then the user needs to take care of the correct PIN connection and power supply.
The following figure shows the PIN assignments.

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