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IR send/receive (https://www.digikey.de/en/maker/tutorials/2021/how-to-send-and-receive-ir-signals-with-a-raspberry-pi)

• cd /boot
• sudo vi config.txt (uncomment and id gpio pins used for receive and transmit) - reboot to enable
• sudo apt install ir-keytable
• sudo ir-keytable -c -p all -t (will display IR received by protocol -> events)
• sudo apt install lirc
• cd /etc/lirc
• sudo vi lirc_options (may have to update device /dev/lirc0) - reboot
• sudo systemctl stop lircd.service (??)
• sudo mode2 -d /dev/lirc0 (will display 'raw' IR data received)

1. config.txt - dtoverlay - verify appropriate GPIO pins
2. sudo ir-keytable -c -p all -s rc1 -t (-p all) & (-s rc1)
3. IR Sender: ir-ctl -S rc5:0x10 -d /dev/lirc0

lsmod | grep gpio - to verify that gpio pins are assigned (pinout will also verify IN | OUT)

Setting up a switch to control IR output

1. send IR signals as before
2. establish GPIO output (raspi-gpio set ## [BCM] op)
3. turn switch on/off -> raspy-gpio set ## (dh for 1, dl for 0)