More updates, GPIO pins!
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Josh Mudge
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5-9-17.md
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68
5-9-17.md
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I setup wiring on the Orange Pi but was unable to access it through a bridged internet interface.
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I need another ethernet cable, I'm pausing at 11:05AM.
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Resumed at 11:23 with ethernet cable, `arp` isn't giving me anything on where the Pi is.
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You must plug in the ethernet to the Pi after plugging in power. Fing is a good network discovery tool. He ran fing twice before and after we plugged in the pi and ran diff on the two captures.
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AJ tested using a USB cable with exposed cables, Black = ground Red = multiverse
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He hooked them to the board to a resistor to the LED and it worked.
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Green = Black Yellow = Red
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We wired it up with pin 6 (ground and pin 2 VCC3.3V)
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Check the GPIOs in the kernel
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/sys/gpio/
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Find a GPIO already turned on.
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I want to setup rocket.chat. I followed these instructions and modified them for the Raspberry Pi https://rocket.chat/docs/installation/manual-installation/ubuntu/
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Install Node & NPM: `curl -fsSL bit.ly/node-installer | bash -s -- --no-dev-deps`
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Download: `wget https://releases.rocket.chat/latest/download`
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Decompress: `tar -xvzf download`
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```
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cd Rocket.Chat/programs/server
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npm install phantomjs
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npm install
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cd ..
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sudo ROOT_URL=http://your-host-name.com-as-accessed-from-internet/ \
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MONGO_URL=mongodb://localhost:27017/rocketchat \
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PORT=80 \
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node main.js
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```
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Install MongoDB:
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```
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sudo apt-get update
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sudo apt-get install -y mongodb curl graphicsmagick
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```
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I had to deal with this issue on my Raspberry Pi:
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`gpg: failed to start the dirmngr '/usr/bin/dirmngr': No such file or directory`
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`sudo apt-get install dirmngr`
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`sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10`
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# Install Snap on Raspi
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`echo "deb https://mm.gravedo.de/raspbian/ jessie main" > /etc/apt/sources.list.d/snapd.list`
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sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv B9465B841412DB3B
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apt update
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apt install -y snapd
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sudo snap install rocketchat-server
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sudo systemctl restart snap.rocketchat-server.rocketchat-mongo.service
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# Haraka on ORANGE_PI
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npm install -g Haraka
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@ -2,8 +2,6 @@ Search terms: printout, wiring diagram.
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Actual diagram:
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People who have done it: https://www.youtube.com/watch?v=KF1IJvINjYE
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https://www.youtube.com/watch?v=4zICevDOhr8
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@ -57,3 +55,43 @@ Adjust device default LEDs.
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Raspi example of LED lighting:
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https://thepihut.com/blogs/raspberry-pi-tutorials/27968772-turning-on-an-led-with-your-raspberry-pis-gpio-pins
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Orange Pi USB process: https://diyprojects.io/orange-pi-onelite-tutorial-use-gpio-python-pinouts/
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sudo apt-get update
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sudo apt-get upgrade -y
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sudo apt-get install python-dev -y
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sudo apt-get install python-pip -y
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sudo apt-get install -y python-setuptools
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pip install wheel
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pip install pyA20
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git clone https://github.com/duxingkei33/orangepi_PC_gpio_pyH3
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This didn't work, BUT, the below did:
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The general proceeding is described in https://linux-sunxi.org/GPIO
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The GPIO pins are accessed via the sysfs file system. For enabling a specific pin it has to be exported into /sys/class/gpio/export
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for pin PA1 the command would be echo 1 > sys/class/gpio/export. The pin number is calculated by the following formula :
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(position of letter in alphabet - 1) * 32 + pin number
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PA1 has pin number ('A' is the 1st letter ) 1, PB2 has pin number 34 ('B' is 2nd letter ), PG7 has pin number 199( 'G' is 7th letter (7-1) * 32+7=199 )
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the positions on the physical header are different again, cf. the graphic below
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so for enabling PG7 that is pin 40 on the physical header can be used
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(# echo "out" >/sys/class/gpio/gpio5/direction first)
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echo 199 > sys/class/gpio/export
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Then you can run `echo "1" >/sys/class/gpio/gpio2/value` to turn it on and `echo "0" >/sys/class/gpio/gpio2/value` to turn it off.
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https://stackoverflow.com/questions/46463724/accessing-gpio-on-orangepi-pc-plus-h3-on-armbian-3-4-113-and-newer
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https://diyprojects.io/orange-pi-onelite-tutorial-use-gpio-python-pinouts/
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https://forum.armbian.com/topic/1471-solved-difficulty-accessing-gpio-via-the-sunxi-gpio-export-interface/
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