Rasbery PI 5 preparing

Initial configuration of Rasberry PI 5:

• Create the image with latest version of RasberryPI OS with enabled SSH and configured WiFi
• Insert the SD to RPI and connect to the power supply at least 3A 5V
• After successful loading of OS scane your local network IPs and find the RPI's one
• Connet to RPI by SSH and check everything works properly
• by sudo raspi-config and enable VNC

Configuration of UARTs:

• Update Rasberry PI5 kernel by command sudo rpi-update y and reboot
• Enable UARTs by adding into the file /boot/firmware/config.txt the next lines:

  [all]
  
  enable_uart=1
  dtoverlay=uart1-pi5
  dtoverlay=uart2-pi5
  dtoverlay=uart3-pi5
  dtoverlay=uart4-pi5

• Reboot the device sudo reboot
• Check if UARTs are ready:

  pi@pi:~ $ pinctrl 0-15
  0: ip    pu | hi // ID_SD/GPIO0 = input
  1: ip    pu | hi // ID_SC/GPIO1 = input
  2: no    pu | -- // PIN3/GPIO2 = none
  3: no    pu | -- // PIN5/GPIO3 = none
  4: no    pu | -- // PIN7/GPIO4 = none
  5: no    pu | -- // PIN29/GPIO5 = none
  6: no    pu | -- // PIN31/GPIO6 = none
  7: no    pu | -- // PIN26/GPIO7 = none
  8: a2    pn | hi // PIN24/GPIO8 = TXD3
  9: a2    pu | hi // PIN21/GPIO9 = RXD3
  10: no    pd | -- // PIN19/GPIO10 = none
  11: no    pd | -- // PIN23/GPIO11 = none
  12: a2    pn | hi // PIN32/GPIO12 = TXD4
  13: a2    pu | hi // PIN33/GPIO13 = RXD4
  14: a4    pn | hi // PIN8/GPIO14 = TXD0
  15: a4    pu | hi // PIN10/GPIO15 = RXD0
  

• If UARTs are not shown you can debug it by commands:

Check if any issues during the boot

dmesg | grep ttyAMA

Expected output

[    0.000000] Kernel command line: reboot=w coherent_pool=1M 8250.nr_uarts=1 pci=pcie_bus_safe snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1  smsc95xx.macaddr=D8:3A:DD:F5:5E:34 vc_mem.mem_base=0x3fc00000 vc_mem.mem_size=0x40000000  console=ttyAMA10,115200 console=tty1 root=PARTUUID=a492c4db-02 rootfstype=ext4 fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles cfg80211.ieee80211_regdom=PL
[    0.010368] 107d001000.serial: ttyAMA10 at MMIO 0x107d001000 (irq = 15, base_baud = 0) is a PL011 rev2
[    0.010400] printk: console [ttyAMA10] enabled
[    0.533487] 1f00030000.serial: ttyAMA0 at MMIO 0x1f00030000 (irq = 125, base_baud = 0) is a PL011 AXI
[    0.533658] 1f0003c000.serial: ttyAMA3 at MMIO 0x1f0003c000 (irq = 144, base_baud = 0) is a PL011 AXI
[    0.533792] 1f00040000.serial: ttyAMA4 at MMIO 0x1f00040000 (irq = 145, base_baud = 0) is a PL011 AXI

Check if UARTs enabled in boot configuration

ls -l /dev/ttyAMA*

Expected output

pi@pi:~ $ ls -l /dev/ttyAMA*
crw-rw---- 1 root dialout 204, 65 Apr  9 11:17 /dev/ttyAMA1
crw-rw---- 1 root dialout 204, 74 Apr  9 11:34 /dev/ttyAMA10
crw-rw---- 1 root dialout 204, 66 Apr  9 11:17 /dev/ttyAMA2
crw-rw---- 1 root dialout 204, 67 Apr  9 11:17 /dev/ttyAMA3
crw-rw---- 1 root dialout 204, 68 Apr  9 11:17 /dev/ttyAMA4

!!! Important !!! It should be dialout type

Check if CPU is right version

lscpu

Expected output

Architecture:            aarch64
  CPU op-mode(s):        32-bit, 64-bit
  Byte Order:            Little Endian
CPU(s):                  4
  On-line CPU(s) list:   0-3
Vendor ID:               ARM
  Model name:            Cortex-A76
    Model:               1
    Thread(s) per core:  1
    Core(s) per cluster: 4
....

Check if UARTs downloaded properly

dtoverlay -a | grep uart

Expected output

....
uart0
uart0-pi5
uart1
uart1-pi5
uart2
uart2-pi5
uart3
uart3-pi5
uart4
uart4-pi5
uart5
...

Check the UART by making shorcut from TX to RX and running minicom. You should see back all the text you are typing

sudo apt install minicom
minicom --device /dev/ttyAMA2 --baudrate 420000

To back up Rasberry PI image

# To create a backup image from SD card
sudo dd if=/dev/mmcblk0 | gzip -c  > /media/pi/hh/angryeyes.img.gz
# To write the image to SD card
gzip -dc ./angryeyes.img.gz | sudo dd bs=4M of=/dev/sda status=progress

Scheme to connect hardware

Python application running

Application runs automatically during the start To enable in the next code should be added to nano ~/.config/wayfire.ini

.....
[autostart]
influx = sudo influxd > /dev/null 2>&1 &
autopilot = lxterminal -e bash /python/starter.sh

After reboot the terminal should be running and capture and autopilot should react on ELRS TX switchs

Video connetions set up Analog camera -> USB -> miniHDMI -> Analog FC

The scheme to connect is:

After this the video will be sent to Flight controller, which will add OSD information. Finally, you will see on your goggles video from Rassberry Pi 5 + OSD information what is very convenient.

Links to hardware:

• Analog to USB Converter
• Mini HDMI to HDMI cable
• HDMI to Analog converter
• Level Convertor

Installing and configuring IfluxDB

InfluxDB can write 1000s of metrics per second on Raspberry Pi using 0.7% CPU and 100M memory.

IMPORTANT InfluxDb should have version 1, not 2. if you install influxdb2, it would start asking AUTH, we don't need it now.

This is how it could be installed

curl https://repos.influxdata.com/influxdata-archive.key | gpg --dearmor | sudo tee /usr/share/keyrings/influxdb-archive-keyring.gpg >/dev/null

echo "deb [signed-by=/usr/share/keyrings/influxdb-archive-keyring.gpg] https://repos.influxdata.com/debian stable main" | sudo tee /etc/apt/sources.list.d/influxdb.list

sudo apt update

sudo apt install influxdb

pip3 install influxdb --break-system-packages

Before starting roller, make sure that influxdb is started

sudo influxd &

It might write a qute some logs to stdout, so this could be solved with

sudo influxd > /dev/null 2>&1 &

Influx backup

Create a backup in the portable format

influxd backup -portable /path/to/backup-destination

Restore from a portable backup

influxd restore -portable /path/to/backup-destination

Grafana

Installing Grafana on Windows

1. Download the latest stable version of Grafana from the official Grafana website: https://grafana.com/grafana/download.

2. Extract the downloaded ZIP file to a directory of your choice.

3. Open a command prompt and navigate to the directory where you extracted Grafana.

4. Run the following command to start Grafana:

./bin/grafana-server.exe

5. Open a web browser and go to http://localhost:3000 to access the Grafana web interface.

6. Log in with the default credentials:

• Username: admin
• Password: admin

7. Follow the on-screen instructions to set a new password for the admin user.

8. Configure Grafana by adding data sources and creating dashboards.

9. You can stop Grafana by pressing Ctrl+C in the command prompt where it is running.

Configure datasources

Import dashboards

To import Grafana dashboard:

• Go to "New dashboard" and "Import"
• Choose the JSON file from grafana folder accordingly
• Import your dashboard to your Grafana
• Enjoy to explore the Dashboard