NINA-B31 series - Getting Started
UBX-18022394 - R02
Evaluation board
Page 13 of 26
3
Evaluation board
There are two NINA-B31 evaluation boards:
•
EVK-NINA-B311 has a NINA-B311 module with u-blox connectivity software and an antenna
connector for connecting to external antennas.
•
EVK-NINA-B312 has a NINA-B312 module with u-blox connectivity software and an internal
antenna (a unique 2.4 GHz metal sheet antenna soldered on to the module).
3.1
LED indications and buttons
There are two operational buttons (SW1 and SW2) and one multi LED (DS9), as shown in Figure 9.
Figure 9: EVK-NINA-B31 Evaluation board
The LED indicates what mode is currently active and what activity is currently in progress. The
following color indications are used. See EVK-NINA-B3 User Guide [3] for more information about the
EVK-NINA-B3.
•
Green: The current mode is data mode and no connection attempts are in progress.
•
Orange: The current mode is command mode.
•
Purple: A connection attempt is in progress.
•
Blue: A connection is currently active.
•
Blue Blinking: A connection is active and data is transmitted or received over air.
•
Red Blinking: Error detected. Typically, this means buffer overflow, parity or framing error
detected on the UART.
☞
The LED on the evaluation board is a 3-colour LED, which means that, on the module, it
corresponds to three IO pins.
