sudo apt-get update
Enable interfaces
sudo raspi-config
Enable Interface options VNC, I2C, SPI, Serial, etc.
(Optional) Install Remote Desktop
apt-get install xrdp
We also want to install some CircuitPython Adafruit libraries, since we're gonna use a lot of sensors from Adafruit, because they make their own drivers for them. Follow the instructions here: https://learn.adafruit.com/circuitpython-on-raspberrypi-linux/installing-circuitpython-on-raspberry-pi
Download the Arduino IDE, go to preferences and add the URL below for Additional Boards Manager (click on the small icon on the side):
https://adafruit.github.io/arduino-board-index/package_adafruit_index.json
Click OK.
Now, go to the 'Tools' tab, mouse over 'Board:' and go to 'Boards Manager...' and install the following:
-
"Arduino SAMD Boards"
-
"Arduino SAMD Beta Boards"
-
"Adafruit SAMD Boards"
Restart the Arduino IDE.
Now connect the Adafruit Feather M0 with USB and go to the 'Tools' tab, go to 'Board:' and pick 'Adafruit Feather M0'.
And that's it!
| GPS | Raspberry Pi |
|---|---|
| Vin | 3.3V |
| GND | GND |
| RX | UART TX |
| TX | UART RX |
- Set up minicom, so we can test out the UART ports.
sudo apt-get install minicom
- Edit the /boot/cmdline.txt file, so that it looks like this: (We are simply deleting references to ttyAMA0) Here is what looks like on the current Raspberry Pi (may differ):
dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p7 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait splash plymouth.ignore-serial-consoles
(single line)
- We can now test out what sort of data we are receiving from the UART serial port, but we first need to change the settings for the minicom:
sudo minicom -s
Go to serial port, change serial device to: /dev/ttyS0 Go to Bps/Par/Bits, change baudrate to: 9600
- We also want to install the great NMEA parser from this link: https://github.com/inmcm/micropyGPS Follow the install instructions and set it up. Then, you'll be able to use lib_GPS
| Sensor | Raspberry Pi |
|---|---|
| Vin | 3.3V |
| GND | GND |
| SCL | i2c SCL |
| SDA | i2c SDA |
First we gotta set-up the Raspberry Pi:
sudo apt-get install python-smbus
sudo apt-get install i2c-tools
Set up modules:
sudo nano /etc/modules
i2c-bcm2708
i2c-dev
Remove blacklists:
sudo nano /etc/modprobe.d/raspi-blacklist.conf
#blacklist spi-bcm2708
#blacklist i2c-bcm2708
The MPL3115A2 requires a repeated start command in it's I2C communication - the Raspberry Pi doesn't do this out of the box, but we can use a kernel module.
sudo su -
echo -n 1 > /sys/module/i2c_bcm2708/parameters/combined
exit
We will also use Adafruit's CircuitPython MPL3115A2 library, and once the Adafruit CircuitPython dependencies are installed above, we can install the sensor driver with:
pip3 install adafruit-circuitpython-mpl3115a2
Additional Reading:
- http://www.hobbytronics.co.uk/raspberry-pi-serial-port
- http://n5dux.com/ham/raspberrypi/igate.php
- http://www.rowetel.com/?p=5344
- https://github.com/antonjan/Raspberry_Telemetry
- https://hackaday.com/2018/05/02/raspberry-pi-is-up-up-and-away/#more-306026
- https://create.arduino.cc/projecthub/jweers1/arduino-aprs-tracker-wilderness-location-tracking-a50607
- https://www.sparkfun.com/news/389
- https://www.sparkfun.com/tutorials/185
- https://n1aae.com/raspberry-pi-aprs-direwolf-linux-igate-digipeater/