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
nrf9151dk_merged.hexfile from the firmware directory. - Download the latest modem firmware. It should be named
mfw_nrf91x1_2.x.x.zip. 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.
The interface chip on the nRF9151DK exposes 2 virtual COM ports. The first one is where you will find the MicroPython REPL prompt.
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')There are four buttons:
- Button 1: It can be used with
Pin.cpu.gpio0_8 - Button 2: If pressed at boot time, the board will skip executing a
main.pyfile from the filesystem. During normal operation, it can be used withPin.cpu.gpio0_9 - Button 3: It can be used with
Pin.cpu.gpio0_18 - Button 4: It can be used with
Pin.cpu.gpio0_19
There are four LEDs:
- LED1: Can be accessed with
Pin.cpu.gpio0_0 - LED2: Can be accessed with
Pin.cpu.gpio0_1 - LED3: Can be accessed with
Pin.cpu.gpio0_4 - LED4: Can be accessed with
Pin.cpu.gpio0_5
from machine import Pin
pin = Pin(Pin.cpu.gpio0_2, Pin.OUT)The available bus is i2c2 and this is how you get an instance:
from machine import I2C
i2c = I2C('i2c2')See the Cellular Guide for the network APIs.