Jack-O-Lantern Configuration Notes

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Schematic:

* GPIO 2 (5v) to HC-SR04 pin 1 (VCC)
* GPIO 6 (GND) to HC-SR04 pin 4 (GND)
* GPIO 12 (BCM 18) to LED in (both)
* GPIO 14 (GND) to LED out (both)
* GPIO 16 (BCM 23) to HC-SR04 pin 2 (TRIG)
* GPIO 18 (BCM 24) to 1k resistor to HC-SR04 pin 3 (ECHO) to 2.2k resistor to GPIO 20 (GND)

Molex-10 (Raspberry Pi):

1: Red to HC-SR04 molex-4 pin 1
3: Black to HC-SR04 molex-4 pin 4
6: White to LED
7: Black to LED
8: Blue to HC-SR04 molex-4 pin 2
9: Yellow to 1k resistor to HC-SR04 molex-4 pin 3
10: Black to 2.2k resistor to HC-SR04 molex-4 pin 3

Molex-4 (LED):

1: Red to molex-4 pin 1
2: Blue to molex-10 pin 8
3: 1k resistor to yellow to molex-10 pin 3; 2.2k resistor to black to molex-10 pin 10

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Configuration:

sudo nano /etc/default/keyboard			# change XKBLAYOUT="gb" to XKBLAYOUT="us"
sudo /usr/sbin/locale-gen --purge en_US.UTF-8
Edit /etc/dhcpcd.conf and add the following line at the bottom:
	static domain_name_servers=8.8.8.8 8.8.4.4
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install python-pip python-dev build-essential RPi.GPIO mpg123
sudo apt autoremove
pip install --upgrade pip

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Set script to run at startup:

Run raspi-config. Select option 3 ("Boot Options"), option 1 ("Desktop / CLI"), and option 2 ("Console Autologin").

Edit ~/.bashrc and add:
	/home/pi/pumpkin.py

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Music and sound effects:

Create a folder called ~/Music for music (preferably MP3s, or any format that mpg123 can play) and a folder called ~/Sounds for sounds (preferably WAVs, or any format that aplay can play). Spaces in the filenames may create problems.

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HC-SR04 range finder:

https://thepihut.com/blogs/raspberry-pi-tutorials/hc-sr04-ultrasonic-range-sensor-on-the-raspberry-pi

Note: Some HC-SR04s are defective. See following link for more info.

https://forums.parallax.com/discussion/153735/pulsin-timeout-and-hc-sr04-problems

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LIRC:

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Step 1: Install LIRC

sudo su -c "grep '^deb ' /etc/apt/sources.list | sed 's/^deb/deb-src/g' > /etc/apt/sources.list.d/deb-src.list"

sudo apt install -y vim devscripts dh-exec doxygen expect libasound2-dev libftdi1-dev libsystemd-dev libudev-dev libusb-1.0-0-dev libusb-dev man2html-base portaudio19-dev socat xsltproc python3-yaml dh-python libx11-dev python3-dev python3-setuptools

mkdir ~/lirc-src ; cd ~/lirc-src ; apt source lirc

wget https://raw.githubusercontent.com/neuralassembly/raspi/master/lirc-gpio-ir-0.10.patch

patch -p0 -i lirc-gpio-ir-0.10.patch
cd lirc-0.10.1 ;  debuild -uc -us -b
cd ~/lirc-src

sudo apt install ./liblirc0_0.10.1-5.2_armhf.deb ./liblircclient0_0.10.1-5.2_armhf.deb ./lirc_0.10.1-5.2_armhf.deb
			# this command will fail, but needs to be run anyway

sudo cp /etc/lirc/lirc_options.conf.dist /etc/lirc/lirc_options.conf
sudo cp /etc/lirc/lircd.conf.dist /etc/lirc/l

sudo nano /etc/lirc/lirc_options.conf			# set the following options:
	driver = default
	device = /dev/lirc1
sudo nano /boot/config.txt								# add the following lines:
	dtoverlay=gpio-ir,gpio_pin=17
	dtoverlay=gpio-ir-tx,gpio_pin=18
# note: this is the opposite pinout configuration from most places, including the
# source guide below - it is switched so that gpio-ir-tx is included in the molex
# connector.

sudo apt install -y --allow-downgrades ./liblirc0_0.10.1-5.2_armhf.deb ./liblircclient0_0.10.1-5.2_armhf.deb ./lirc_0.10.1-5.2_armhf.deb
			# this command will succeed this time

Reboot. Confirm that /dev/lirc0 and /dev/lirc1 exist.

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Step 2: Recording IR Commands

Stop LIRCD:
	sudo systemctl stop lircd
Setting LIRC configuration for receiving:
	Edit /etc/lirc/lirc_options.conf and set the following option:
		device = /dev/lirc1
Restart LIRC:
	sudo systemctl start lircd

Testing receipt of data:
	mode2 -d /dev/lirc1
Press a button - if the command is received, the console will output a series of space and pulse outputs.

Recording a remote:
	irrecord -n -d /dev/lirc1 ~/lircd.conf
This command runs in an interactive mode. Follow the instructions (more or less exactly) - may have to repeat if something gets screwed up. The output is a lircd.conf file including the device name.

Applying configuration to lirc:

sudo mv <YOUR DEVICE NAME>.lircd.conf /etc/lirc/lircd.conf

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Step 3: Playing IR Commands

Stop LIRCD:
	sudo systemctl stop lircd
Setting LIRC configuration for transmitting:
	Edit /etc/lirc/lirc_options.conf and set the following option:
		device = /dev/lirc0
Restart LIRC:
	sudo systemctl start lircd

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Source:

https://github.com/AnaviTechnology/anavi-docs/blob/master/anavi-infrared-phat/anavi-infrared-phat.md#setting-up-lirc

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