Raspberry Pi

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Inventory

violet 3B+ BT B8:27:EB:A3:E7:69 WLAN b8:27:eb:5c:18:96 eth0 b8:27:eb:09:4d:c3
okapi 0w WLAN eth0
zebra 0w WLAN eth0
golden 3B WLAN ioPhat eth0

Bluetooth

sudo apt install bluetooth blueman python-gobject python-gobject-2

Charge 2 BLE F1:1D:85:35:B5:00
Charge 3 BLE E0:75:52:DC:71:D3
One BLE C7:B2:39:F6:BE:51
Brian MOTO BT D4:63:C6:5B:28:56
Julie MOTO BT
Plover BT 3C:15:C2:DD:15:9D
Stellar BT
Swift BT
EY-SB battery charger BT 44:A6:E5:1F:FA:FD
WinkHub BT 00:21:CC:55:0A:B5
SC BT CC:58:00:00:09:64
??? 41:E5:79:41:3B:C7

My first edition Model B from 2012 got fried somehow, and it's passed beyond the Veil of Smoke into the Netherworld.

I have printed a case for the old one, now I am Printing a Pi 2 case. Turns out making cases is one of the most fun things I have done with a Pi so far.

1/1/2013 Happy New Year!

I got a heavy duty 7 port USB hub for it, a nice cast al box, and now I want to make it work with my Lilliput 7" DisplayLink monitor.

To do that I will need to compile a kernel (ugh! back to doing that again!)

See also 8track and Lilliput DisplayLink monitor

Hardware

Related vaguely to the PI or usable with it

  • Pi Noir camera and cables for Pi and Pi Zero
  • case with protoboard
  • Startech industrial 7 port USB hub -- need power connector from digikey, ED2779-ND
  • UBlox GPS
  • Alfa WiFi adapter
  • 7" Lilliput DisplayLink monitor with touchscreen
  • Apple bluetooth keyboard
  • AData 32 GB Class 10 SDHC card
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 010: ID 0eef:0001 D-WAV Scientific Co., Ltd eGalax TouchScreen
Bus 001 Device 011: ID 17e9:02a9 DisplayLink 
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. 
Bus 001 Device 004: ID 047d:2043 Kensington 
Bus 001 Device 005: ID 0409:0050 NEC Corp. 7-port hub
Bus 001 Device 006: ID 0bda:817f Realtek Semiconductor Corp. RTL8188RU 802.11n WLAN Adapter
Bus 001 Device 009: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 012: ID 1546:01a4 U-Blox AG 
Bus 001 Device 007: ID 046d:c06c Logitech, Inc. Optical Mouse
Bus 001 Device 008: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)

Adafruit HDMI adapter

These are adapters that connect a color LCD to an HDMI port. I got one with touch and one without. I am using the touch enabled board with a 5" LCD, also from Adafruit.

Copy the image (trying KivyPie right now) to an SD card using Etcher. Then mount the first partition and edit config.txt

Edit config.txt to enable the display 

# uncomment if hdmi display is not detected and composite is being output
hdmi_force_hotplug=1
 
# uncomment to force a specific HDMI mode (here we are forcing 800x480!)
hdmi_group=2
hdmi_mode=87
hdmi_cvt=800 480 60 6 0 0 0
hdmi_drive=1
 
max_usb_current=1

Also... 

enable_uart=1

To enable ssh server 

touch ssh

Put the card into the Pi and power it up.

With Raspian, I was done. With KivyPie I just get a pretty rainbow screen. Darn. Could be this: 

NOTE: startx is missing on this image, execute this command to install it:
sudo apt-get install fluxbox xinit x11-apps xclip 
xsel lxterminal xterm xserver-xorg-video-fbturbo

I wonder how I get a prompt? I think I will need to ssh in.

Installing Kivy from files onto Raspian

https://kivy.org/doc/stable/installation/installation-rpi.html

Seg faults -- fix it https://github.com/kivy/kivy/issues/6007


Distro

Raspian Stretch is my usual favorite.

KivyPie DOES NOT WORK

DisplayLink kernel build

Some help with kernels and DisplayLink http://karuppuswamy.com/wordpress/2012/08/17/lilliput-displaylink-usb-monitor-um-70-17e902a9-with-raspberry-pi-on-raspbian/

Following Mitchtech kernel compile instructions with a few variations. I am using Linux Mint 14 as my build host. This installs the newest (4.7) compiler and creates symlinks. This step (building a working ARM tool chain) used to take days to figure out. Ah, progress! I love the Linux world I live in! 

sudo apt-get install gcc-arm-linux-gnueabi git-core ncurses-dev

Fetching code 

mkdir -p ~/src/raspberrypi
cd ~/src/raspberrypi
git clone https://github.com/raspberrypi/tools.git
git clone https://github.com/raspberrypi/linux.git
cd linux

make ARCH=arm CROSS_COMPILE=/usr/bin/arm-linux-gnueabi- bcmrpi_cutdown_defconfig
# enabled the DisplayLink module and disable many things I will never use
make ARCH=arm CROSS_COMPILE=/usr/bin/arm-linux-gnueabi- menuconfig
make ARCH=arm CROSS_COMPILE=/usr/bin/arm-linux-gnueabi- -k -j5
mkdir ../modules
make modules_install ARCH=arm CROSS_COMPILE=/usr/bin/arm-linux-gnueabi- INSTALL_MOD_PATH=../modules/
cd ../tools/mkimage/
# Create kernel.img
./imagetool-uncompressed.py ../../linux/arch/arm/boot/Image
cp kernel.img /media/bwilson/8B12-9112/
sudo rm -rf /media/bwilson/29b6c2f5-5469-49f2-abd5-daa9149021cc/lib/modules/
sudo rm -rf /media/bwilson/29b6c2f5-5469-49f2-abd5-daa9149021cc/lib/firmware/
sudo cp -a lib/modules/ /media/bwilson/29b6c2f5-5469-49f2-abd5-daa9149021cc/lib
sudo cp -a lib/firmware/ /media/bwilson/29b6c2f5-5469-49f2-abd5-daa9149021cc/lib

Zoom zoom away we go. Put SD card in Pi. Connect monitor and boot. Worked on first try for me! Fabulous.

X11

Before diving in to the above instructions on how to get X11 going, I typed "startx" and it came up! Okay. Moving on. I need the touchscreen to work. It acts like it works but is not calibrated. I am using a mouse at the moment.

Wifi

ALFA AWUS036H works but does not show up in wpa_gui.

ALFA AWUS036NHR works. wpa_gui does not fit on the small monitor. This is a problem!

Trying to get this sorted by following the instructions for wicd from this page: http://wiki.debian.org/WiFi/HowToUse 

apt-get install wicd

Could be the only problem was that bwilson was not a member of netdev

Wardriving

apt-get install kismet

Given that wardriving is low priority, I am leaving kismet set-up for another rainy day.

(And it's rainy today! Heh. 12/8/2016)

Bluetooth keyboard

The Zonet USB bluetooth adapter which I used in 8track does not work in the Pi. It identifies itself as ID 0a5c:2101 Broadcom Corp. BCM2045 Bluetooth

The Parani UD100 does though. I think I need a few more Parani's! They are cool.

apt-get install bluez blueman

root@raspberrypi:/etc/default# hcitool scan Scanning ... 00:80:25:1C:C0:27 SMA001d SN: 2120048888 SN2120048888 E8:06:88:4F:52:48 Apple Wireless Keyboard

Once confident that there really was a bluetooth device on the Pi, I ran blueman-assistant from the console and it worked! Presto! I wonder if it works after rebooting...

GPS stuff

Hardware: probably a UBlox AEK-4P with a mag mount antenna on the roof. Using the Ublox means I can connect the Pi via USB and the Kenwood radio via RS232 adapter. 

sudo apt-get install foxtrotgps gpsd
sudo dpkg-reconfigure gpsd gpsd-clients

Big Buttons in the Pandemic April 2020

I have been playing with using this Contour Shuttle Xpress as a media controller on Murre and got this idea that it would be more fun to build a custom controller. Then I thought "maybe a Pi Zero could do that?"

I have some rotary encoders and some giant arcade style buttons stashed. Hmm.

First off, how can I make the Pi look like an HID device?

Since I have "AutoHotKey" already installed in theory making the Pi into a keyboard should be all I need to do, and, voila!

Turn Your Raspberry Pi Zero into a USB Keyboard (HID)

Also there is this Adafruit article about "Gadgets"

But let's give the keyboard hack a try.

Music in the Pandemic May 2020

Violet the Pi 3B+ getting an "apt upgrade" of Stretch, in progress. Done. Rebooted. 

sudo apt install emacs-nox

I wanted to just run output to the 3.5mm audio jack to test the options for Squeezebox and Alexa without any further ado. I want to hide a Pi inside a beloved Panasonic RC-7243 clock radio to bring it into the present, streaming music and talking to us.

Alexa needs a microphone so so I start with Logitech Squeezebox client. Do I want Alsa or PortAudio?? Alsa for starters. All I need do is 

sudo apt install squeezelite
amixer cset numid=3 1
alsamixer

and plug in the speakers. Use alsamixer to pump up the volume. My board was muted by default which I switched with 

amixer cset numid=2 1

You can do 

amixer controls
  numid=3,iface=MIXER,name='PCM Playback Route'
  numid=2,iface=MIXER,name='PCM Playback Switch'
  numid=1,iface=MIXER,name='PCM Playback Volume'
  numid=5,iface=PCM,name='IEC958 Playback Con Mask'
  numid=4,iface=PCM,name='IEC958 Playback Default'
amixer cget numid=2
 numid=2,iface=MIXER,name='PCM Playback Switch'
 ; type=BOOLEAN,access=rw------,values=1
 : values=on     <--- this means it's unmuted

There is no /dev/mixer or /dev/sound/mixer so aumix does not work.

Alexa

I have a "HyperX" USB audio device that I can try out for a microphone input. I have a couple webcams too, I think I will try the webcam first since it's just parked in a box. 

lsusb
Bus 001 Device 005: ID 046d:081d Logitech, Inc. HD Webcam C510
Bus 001 Device 004: ID 0424:7800 Standard Microsystems Corp.
Bus 001 Device 003: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 002: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: U0x46d0x81d [USB Device 0x46d:0x81d], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Configure .asoundrc as per https://iotbytes.wordpress.com/connect-configure-and-test-usb-microphone-and-speaker-with-raspberry-pi/

Okay, it looks like there is audio. How to test? 

arecord --format=S16_LE --duration=10 --rate=16000 out.wav
aplay out.wav

That works for me. Raw output did not work BTW.

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