Dave Horton DavesCodeMusings

Ubuntu Server on Orange Pi Zero 3

Even with the current tariff nonsnese, the Orange Pi Zero 3 is a cheap and fairly capable ARM single board computer (SBC). If you've mastered the Raspberry Pi and you want to branch out, Armbian Ubuntu on the Zero 3 is a good place to start.

Download and flash the Armbian Ubuntu binary image

Visit the Armbian Orange Pi Zero 3 page
Scroll down to Server images
Download Ubuntu 24.04 (Noble), the current version at time of writing.
Use Raspberry Pi Imager, Balena Etcher, or whatever to flash the binary image to microSD.

	/*
	Interrupt driven pulse width modulation for ATmega328 (a.k.a. Arduino Uno R3.)
	Vary the brightness of an LED on a non-PWM capable pin.
	*/

	#define LED_PIN 13 // The builtin LED on Arduino Uno.
	#define BRIGHTNESS 6502 // Must be less than 65536. Values of 40 or less may give unpredictable results.

	// Turn the LED on when the timer wraps around to zero.
	ISR(TIMER1_OVF_vect) {

	/*
	ATMega328 (Arduino Uno) sleep mode, external interrupt wake, serial echo.

	This sketch is a proof of concept for sleep with very low power draw.

	The sketch echoes whatever is sent to the serial input back to the
	serial output. This is only interresting because it gives solid proof
	the microcontroller is awake. (If you type and it echoes, it's awake.)

	Pins 2 and 3 are configured as interrupts to put the microcontroller

	<!DOCTYPE html>

	<html>

	<head>
	<title>Test</title>
	<style>
	a {
	text-decoration: none;
	}

	name: kanboard
	services:
	app:
	image: kanboard/kanboard:latest
	container_name: kanboard
	restart: unless-stopped
	ports:
	- "8080:80"
	- "8443:443"
	volumes:

	#! /bin/sh

	# Display data from serial attached GPS device for testing.

	PORT=/dev/ttyACM0
	SPEED=9600

	echo "Reading from $PORT at $SPEED bps."
	stty -F $PORT $SPEED

	#! /bin/sh

	# When you're not using systemd on your Raspberry Pi, you
	# can still enjoy GPIO push-button shutdown.
	# Run this as:
	# gpio_pwr_btn.sh &
	# It will sit in the background and wait for GPIO to go low.
	# When it does, it will issue the shutdown command.

	GPIO=GPIO26

-; Prevent recreation of System Volume Information by blocking it with an empty file of the same name.
-; Does System Volume Information store presonally identifiable information? I don't know.
-; Do I want Windoze automagically creating stuff on my Raspberry Pi microSD? No, I don't.
-; Must be run with admin privs
-dir /a
-cd REMOVEABLE_DRIVE_LETTER  (e.g. D:)
-rmdir /s "System Volume Information" & copy NUL "System Volume Information"
-attrib +h "System Volume Information"

	; This assumes Python and esptool module are installed and working.

	; Download the factory image for a fresh install
	curl.exe --output tasmota32c3.factory.bin --url http://ota.tasmota.com/tasmota32/release/tasmota32c3.factory.bin

	; Erase before flashing
	py -m esptool --port=COM3 erase_flash

	; Flash the image to the first detected COM port at offset 0
	py -m esptool write_flash 0x0 .\tasmota32c3.factory.bin

	Creates a syslog server that can be used to centrally collect logs from various network devices.

	You'll need a Docker compose project directory structure that looks like this:
	-rw-r--r-- 1 root root 351 Jul 24 12:00 compose.yml
	drwxr-xr-x 3 1000 1000 4096 Jul 24 12:00 config/
	drwxr-xr-x 2 1000 1000 4096 Jul 24 12:00 logs/

	The syslog-ng.conf goes in the config/ directory. Logs will be found in the logs/ directory.

	Logs are rotated daily.

Dave Horton DavesCodeMusings

Ubuntu Server on Orange Pi Zero 3

Download and flash the Armbian Ubuntu binary image

Attach a console to the Orange Pi