Useful tidbits for Raspberry pi users on Raspian – aka things I wish I knew quicker/easier

I love my Pi2 and my Pi3, they’re amazing pieces of cheap kit I can do anything with – although to be honest I don’t use them anywhere near as much as I should. So here is a compilation of things I found useful this last week when I finally got around to building my Pi3 installation for my house-wide audio system / automation.

Update your firmware

Just get this done right at the start.
sudo BRANCH=next rpi-update
Be sure to restart after it’s done (sudo shutdown -r now)

Disable onboard audio (useful if you want to use USB only for example)

This will stop the onboard audio working. I find this is the easiest option if you always want to have your USB audio as the primary output. I use the Creative WiFi dongle thingy for example.
sudo bash -c 'echo blacklist snd_bcm2835 > /etc/modprobe.d/blacklist-onboard-audio.conf'

Disable wifi power save mode

I am unsure what works for this, so I just set my wlan0 as follows
allow-hotplug wlan0
iface wlan0 inet manual
wireless-power off
post-up iwconfig wlan0 power off
post-up iw dev wlan0 set power_save off

wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

Enable bluetooth persistent connection (if using pulseaudio)

No idea why, but enabling these two modules for pulseaudio prevents bluetooth from immediately disconnecting for me.
sudo vim /etc/pulse/default.pa
Then find the following lines and ensure they’re not commented out (don’t begin with a #)
.ifexists module-bluetooth-policy.so
load-module module-bluetooth-policy
.endif
.ifexists module-bluetooth-discover.so
load-module module-bluetooth-discover
.endif

Install an up-to-date nodejs

wget https://deb.nodesource.com/setup_4.x
sudo -E bash setup_4.x
sudo apt-get install -y nodejs

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