Code and resources for The Official Raspberry Pi Beginner's Guide, 5th Edition from Raspberry Pi Press
Code and resources for The Official Raspberry Pi Beginner's Guide, 5th Edition from Raspberry Pi Press.
English (EN)
Pg. 155 Physical computing with the Sense Hat
5th edition of The Official Raspberry Pi Beginner's Guide(Chap 7) Raspberry Pi 5 + Physical Sense Hat V2, Scratch 3 lessons are not possible to complete, as of Feb. 23, 2024. I am running 64 bit Pi OS debian. I have not tried the emulator.
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English (EN)
Chapters 4, 6, 7
At the time of writing, Scratch 3 had not received an update to Raspberry Pi 5. A new version is under development, and you can find more information in this issue. We will update this issue when more information is available.
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English (EN)
Chapter 9 page 228
The text explains that, "Pin 19 is the bottom-left, Pin 20 the bottom-right". While the Figure 9-12 shows pins 1-20 on left side and pins 21-40 on the right. This same mistake is also made in 'Getting started with MicroPhython on Raspberry Pi Pico" by Garath Halfacree and Ben Everard (RPi_PiPico_Digital_v11.pdf), on page 35.
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English (EN)
Pg 170
Missing the preposition "in"
"Remember that you need both these lines your program in order..."
Should be
"Remember that you need both these lines in your program in order..."
English (EN)
Chapter 6: Computing with Scratch and Python
There is no Python code provided for the Traffic Lights Project.
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English (EN)
Chapter 7
At the time of publication, the Sense Hat Emulator did not work under the newest, Debian Bookworm-based version of Raspberry Pi OS. Scratch 3 did not support Raspberry Pi 5 at the time of publication, either.
However, you can install a version of the Sense Hat Emulator, along with a version of Thonny that can talk to the emulator, with these commands:
sudo apt install libgirepository1.0-dev gcc libcairo2-dev pkg-config python3-dev gir1.2-gtk-4.0 libopenblas-dev
python3 -m venv ~/sense-emu-env
source ~/sense-emu-env/bin/activate
pip3 install pycairo PyGObject sense-emu thonny
Whenever you want to run the Sense Hat Emulator, you'll need to open a Terminal, run . ~/sense-emu-env/bin/activate, then run the Sense Hat Emulator with sense_emu_gui. If you want to use Thonny with the Sense Hat Emulator, you need to run thonny from the terminal after you run the activate command.
You may also find that some Sense Hat Emulator sensors, such as humidity, do not work under 64-bit Bookworm-based Raspberry Pi OS, but will work under the 32-bit version.
A future update to Raspberry Pi OS will eliminate the need for this workaround.
You can more information on virtual environments and why they are required at https://rptl.io/venv
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English (EN)
Chapter 8 page 209
I am using Pi 5 with the HQ Camera (I have tried this on 2 different Pi 5s with 2 different microsd cards running 64 bit Bookworm). Every terminal command, for video recording, given in chaper 8 that suggests file format .h264 doesn't produce a working video file. You end up with a file that shows one second of video. Inorder to get a 10 second video from libcamera-vid -t 1000 -o test.h264 you must change .h264 to nearly any other format (.3g2, .3gp, .avi, .f4v, .flv, .m4v, .mkv, .mov, .mp4, or .mpeg) then it will work.
On page 210 libcamera-vid -t 10000 --save-pts timestamps.txt -o test-time.h264 produces again a 1 second video file. But, also produces a file "timestamps.txt" who's contents are only the text "# timecode format v2" and nothing else. The next command mkvmerge --timecodes 0:timestamps.txt test-time.h264 -o test-time.mkv on page 211, returns a terminal error
mkvmerge v74.0.0 ('You Oughta Know') 64-bit 'test-time.h264': Using the demultiplexer for the format 'AVC/H.264'. Error: The timestamp file 'timestamps.txt' does not contain any valid entry.
I made a forum post on this issue at https://forums.raspberrypi.com/viewtopic.php?p=2206818. Later I did some forum searching and I found some posts on Raspberry Pi's forum that included some replys from naushir "Raspberry Pi Engineer & Forum Moderator". Who said "Saving the pts file through the libav encoder (the only available encoder on Pi 5) is not possible" https://forums.raspberrypi.com/viewtopic.php?p=2169261 & "On Pi 5 we currently don't support timestamp output with the --timestamp argument, as this is automatically handled by the libav codec framework" https://forums.raspberrypi.com/viewtopic.php?p=2152504
Perhaps this could be addressed in future versions of the pdf. Bumping into this issue as a beginner I found it to be very discouraging. I have not continued to the end of this chapter. I have no desire complete this chapter for fear of finding other commands not supported on Pi 5 hardware or software. Frustrating, given that I paid for the paperback and the cover states "Fully updated for Raspberry Pi 5". This issue had me thinking my HQ camera was faulty. I know know for sure now that the camera is fine. As, I have bought both a new Pi 5 (and got the same errors) and a new Pi 4, and had no issues. I have tested these terminal commands on pi 4 running 64bit Bullseye, with the same HQ camera, and the commands are all working fine there. I have not tried on Pi 4 with Bookworm.
With all due respect, I must ask. Were these terminal commands tested by the author on a physical Pi 5? If so, please let me know how he got it to produce working .h264 video files.
English (EN)
4
Paragraph about the radio is missing a verb? "... the component that GIVES Raspberry PI the ability ..." I think "GIVES" is missing in the sentence? Or "provides"?
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English (EN)
pg. 184
On page 184 there is printed "print("pitch {0} roll {1} yaw {2}".format(pitch, roll, yaw)" Should there be a space after the period and before "format"? I see on pages 195 & 197 the word "format' is printed in red unlike the previous occurrence. It is not obvious on pages 195 & 197 that there exists a space (caused by page size limitations, I'm sure), only that on those pages the word "format" is printed in red text. The only way I could get my code in Thonny to show red text for the word "format", was to put a space after the period (some clarification in the book could be helpful for beginners). Also, should there be commas after"pitch {0}", and "roll {1}", like on pages 195 & 197?
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English (EN)
pg 171 Physical computing with the Sense HAT
Not sure if this belongs in "Issues" but, I didn't see a general discussions tab.
During experimenting as suggested on page 171, I found that the LEDs turned off with any RGB value of 47 and below. So, "sense.clear(47, 47, 47)" would turn the panel off, while (48, 48, 48) would show a much dimmed white. Is this an error or just voltage too low for LEDs to operate? Curious, indeed.
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