2.8.1

Skywire Cellular Modem

The hat's Skywire socket allows for the Skywire cellular modem to communicate

with the Raspberry Pi development kit over UART or through a USB connection.

The Skywire’s 20-pin form factor allows for compatibility across all of the Skywire

product line and interchangeability between 2G, 3G, and 4G cellular

technologies.

2.8.2

Grove Connectors

There are two Grove Connectors onboard the adapter that allow users to attach

additional digital Grove sensors. Grove connector J9 connects to GPIO5/GPIO6

to provide two GPIO's and connector J10 connects to the Raspberry Pi's I2C

pins. The adapter's DTO does not load pin configurations for J15 or J16, but

many distributions will automatically configure I2C1 at boot.

NOTE:

​Applications using the Grove connectors on NL-AB-RPI adapter board

with PCB revision 1001430 REV A are affected by

​Errata 1001468​.

2.8.3

EEPROM

The adapter has an onboard EEPROM containing the adapter device tree

overlay(DTO) information that is attached to the ID I2C lines. By default the

EEPROM has write protection enabled to protect the EEPROM from data

corruption, but if users need to modify the EEPROM they can control the WP pin

using GPIO7. The EEPROM is configured by default to use I2C2 address 0x50.

PN 1001465 rev 2

NimbeLink Corp. 2020. All Rights Reserved.

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