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nRF9160DK device guide

Installation

NOTE: If you will be using cellular location or want to speed up GNSS location by using AGNSS, the development kit needs to be connected to nRF Cloud to get the data. Follow these steps before installing Micropython on it or while running a MicroPython program that tries to connect to nRF Cloud (like the Asset Tracker example). This only needs to be done once.

  • Download the nrf9160dk_merged.hex file from the firmware directory.
  • Download the latest modem firmware. It should be named mfw_nrf9160_1.3.x.zip where the x is 5 or later. Do NOT unzip the file.
  • Install nRF Connect for Desktop
  • Use the Programmer application to program the modem firmware and application Hex file onto your development kit.

Usage

The interface chip on the nRF9160DK exposes 3 virtual COM ports. The first one is where you will find the MicroPython REPL prompt.

Filesystem

The first time that you use the device you might need to create the filesystem. You can do that from the REPL prompt:

import os
from zephyr import FlashArea

block_dev = FlashArea(FlashArea.STORAGE, 4096)
os.VfsLfs2.mkfs(block_dev)
os.mount(block_dev, '/flash')

Buttons and LEDs

There are two buttons:

  • Button 1: During normal operation it can be used with Pin.cpu.gpio0_6
  • Button 2: If pressed at boot time, the board will skip executing a main.py file from the filesystem. During normal operation, it can be used with Pin.cpu.gpio0_7

There are four LEDs:

  • LED1: Can be accessed with Pin.cpu.gpio0_2
  • LED2: Can be accessed with Pin.cpu.gpio0_3
  • LED3: Can be accessed with Pin.cpu.gpio0_4
  • LED4: Can be accessed with Pin.cpu.gpio0_5

Pins and GPIO

from machine import Pin

pin = Pin(Pin.cpu.gpio0_2, Pin.OUT)

I2C

The available bus is i2c1 and this is how you get an instance:

from machine import I2C

i2c = I2C('i2c1')

Cellular Interface

See the Cellular Guide for the network APIs.