Orange Pi One Experiments

Contains a few sketches and pinout schematics for the Orange Pi One. Also has an identification sheet for sensors, since they are often not labeled.

The sketches should be self-explanatory.

Getting Started

Creating a bootable SD card (Armbian Focal)

Focal means based on Ubuntu.

Using USBImager or:

diskutil list

diskutil

sudo dd if=path_of_your_image.img of=/dev/rdiskn bs=1m

Used for most of these scripts, generally works better out of the box.

Default username: root

Default password: 1234

You are then prompted to set a secure password.

Creating a bootable SD card (Ubuntu)

(Using Ubuntu image from OrangePi)

Default username: orangepi

Default password: orangepi

Current password: real password, saved in Keychain

Connect to Wifi

After connecting via Ethernet, check router interface for the Pi's IP.

SSH into it: ssh <username>@<ip>

Use nmtui to connect to WiFi.

Again, get the WiFi IP from e.g. your Router's interface. Validate you can SSH via that IP as well. You can now disconnect the Ethernet connection.

Alternatively, you can edit the image - most OS's can be configured to connect to a WiFi on initial boot.

Installing Python Header files

Required to install IO libraries, such as OrangePi.GPIO

sudo apt-get install python3-dev

Installing the IO library

sudo apt install python3-pip sudo pip3 install OrangePi.GPIO

Configuring I2C

Only required to use the MPU or ADS1115 ADC.

sudo apt-get install python3-smbus i2c-tools

armbian-config -> system -> hardware -> i2c0 and use space key to select. Save and reboot.

Configurint W1 (one wire)

Same, but also enable w1-gpio

And follow:

https://blog.ja-ke.tech/2019/01/21/DS18B20-armbian.html

Running something while disconnecting from the Terminal

tmux cd /home/orangepi/tmp/pycharm_project_785/ python3 solar_thermal/control.py crtl+b d tmux attach

tmux new-session -d -s my_session "cd /home/orangepi/tmp/pycharm_project_523/soil_moisture/ && python3 soil_moisture.py"

crontab -e @reboot /home/orangepi/tmp/pycharm_project_523/soil_moisture/tmux_start.sh

to kill:

tmux kill-server

Troubleshooting:

Typical things that can go wrong (hardware):

Not all color LEDs survive 3.3V
Not all RGB LED modules have resistors built in
Double check your poles, the short leg of the LED has to be connected to GND
Just because a pin can be setup as GPIO IN/OUT, doesn't mean they work properly as such. Best stick to the PA/PD/PC pins (see schematics)
PIN 1 3.3V didn't work on my board, had to use the other 3.3V pin
Relay didn't switch on 3.3V, needed 5V

Troubleshooting IO pins

E.g. for PA12 (called PS12 in schematic for some reason)

cd /sys/class/gpio
echo 12 > export
echo out > gpio12/direction
echo 1 > gpio12/value
cat gpio12/value
echo 0 > gpio12/value
echo 12 > unexport

claasm / orangepioneexperiments Goto Github PK