Todd Stellanova tstellanova

## bbb_boot_service_instructions.md

      
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              September 26, 2023 09:43
            
              
                How to setup a service to automatically run a python script when the BeagleBone Black (BBB) reboots.
These instructions allow you to setup a python script to automatically start when the BeagleBone (running Angstrom linux with systemd) restarts. 
              
          
    Creating a service to startup at BeagleBone Black boot time:


Create a shell script such as /usr/bin/myFancyBash.sh:
  #!/bin/bash

  # this could be any runnable code or shell script, really
  /usr/bin/myFancyPython.py 


Note that the first line is critical.

  
## panfrost_build_rockpi4b.md

      
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                Building panfrost natively on armv8 (rockpi4b / RK3399) on Debian "buster"
              
          
sudo apt install python3-pip
Install python3 packages:

pip3 install  setuptools mako


Install many, many packages not included with armbian "buster":


## stlink-raspi.md

      
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              August 12, 2023 13:27
            
              
                Install st-link on raspberry pi
              
          
Brace yourself

sudo apt-get update
sudo apt-get install cmake
sudo apt-get install libusb-1.0-0-dev
mkdir ~/proj
cd ~/proj
git clone https://github.com/texane/stlink stlink-repo
cd stlink-repo


## piaware_rpi0.md

      
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              July 23, 2023 04:07
            
              
                Setup FlightAware piaware on rpi0
              
          
    You can install FlightAware's piaware on a Raspberry Pi Zero - W
This allows you to create a very inexpensive air traffic monitor for
your local region.
Hardware Required


An SDR receiver (such as the FlightAware Pro Stick USB ADS-B Receiver ) compatible with dump1090
A straight USB OTG cable such as this one -- don't get the right-angle plug cables as they're likely to collide with the rpi0's micro usb power plug.
A Raspberry Pi Zero - W with a compatible power supply and micro SD card


## grub_arm64_debian.md

      
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                / grub_arm64_debian.md
            
            
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              July 20, 2023 19:12
            
              
                Installing and running grub on rock64 (rk3328) arm64 
              
          
    Starting with Rock64, u-boot installed to SPI flash, Debian stretch installed to eMMC or micro SD card.
Setup /boot

Add things like dtb and any images you want to eventually load with grub
install grub

From Debian:
sudo apt-get -y install grub2-common efivar grub-efi-arm64


## start_ssh_agent.sh
# typically you'd add this at the end of eg .bashrc

# setup ssh-agent
SSH_ENV=$HOME/.ssh/environment

# start the ssh-agent
function start_agent {
    echo "Initializing new SSH agent..."
    # spawn ssh-agent
    /usr/bin/ssh-agent | sed 's/^echo/#echo/' > "${SSH_ENV}"

## esp32_s2_rgb_led_micropython.md

      
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                tstellanova
                / esp32_s2_rgb_led_micropython.md
            
            
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              January 2, 2023 16:48
            
              
                Notes on driving onboard RGB LEDs on various ESP32 S2 dev boards with micropython or circuitpython
              
          
    Setup

Starting with development boards:


esp32 s2 Saola-1. Has a WS2812 on pin GPIO18
Saola schematic
Feather s2 has an APA102 connected on two pins ( IO45 clock and MTDO data). Feather s2 schematic
ESP32-S2-DevKitM-1
Has a WS2812 connected on GPIO18 .  Schematic


## config_3dr_telem_radios.md

      
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              December 30, 2022 18:27
            
              
                Configure SiK / HopeRF /Holybro telemetry radios using command line interface via USB
              
          
    How to configure ordinary telemetry radio via usb cable.

Connect USB micro cable from laptop to telemetry modem
Connect at 57600 8N1 to radio (using eg screen or picocom)

eg picocom -b57600 /dev/cu.usbserial-DN01307U (the serial port can be found with eg ls /dev/cu* on macOS)


Wait a few seconds
Type +++ and wait -- should respond with OK. If not, wait a few seconds and try again
Type AT<return> -- should repond with OK
Type ATI5<return> to see list of settings
Type eg ATS3=93 and return to set the network ID used by the radio


## video_rec_python_rpi3.md

      
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                / video_rec_python_rpi3.md
            
            
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              September 9, 2022 20:06
            
              
                Capture video and stills from python using a USB webcam and python on the rpi3 or similar
              
          
    Setup: Install pyuvc

This is a wrapper around libuvc the USB video class, for USB-connected cameras.
Install pyuvc and all its dependencies:

sudo apt-get install libusb-1.0 cython
Install libturbojpeg from source (there are some related packages available, but not the one libuvc depends on)

wget -O libjpeg-turbo.tar.gz https://sourceforge.net/projects/libjpeg-turbo/files/1.5.1/libjpeg-turbo-1.5.1.tar.gz/download
tar xvzf libjpeg-turbo.tar.gz
cd libjpeg-turbo-1.5.1


## install-docker-arm64.sh
#!/bin/bash

sudo apt-get install -y \
	       apt-transport-https \
	       ca-certificates \
	       curl \
	       gnupg2 \
	       software-properties-common

curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -
	# typically you'd add this at the end of eg .bashrc

	# setup ssh-agent
	SSH_ENV=$HOME/.ssh/environment

	# start the ssh-agent
	function start_agent {
	echo "Initializing new SSH agent..."
	# spawn ssh-agent
	/usr/bin/ssh-agent \| sed 's/^echo/#echo/' > "${SSH_ENV}"
	#!/bin/bash

	sudo apt-get install -y \
	apt-transport-https \
	ca-certificates \
	curl \
	gnupg2 \
	software-properties-common

	curl -fsSL https://download.docker.com/linux/debian/gpg \| sudo apt-key add -