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by Paul Hutch
Wed Dec 05, 2018 3:06 pm
Forum: Advanced users
Topic: How to pre-install packages on custom image (pi-gen)
Replies: 4
Views: 1031

Re: How to pre-install packages on custom image (pi-gen)

Here's what I do to create my custom starting point images. Configure one of the a stock Raspbian images the way I want it. Delete the DUID (DHCP Unique Identifier) file so that a new DUID is created when a new Pi boots sudo rm /etc/dhcpcd.duid Put the uSd card in another Pi Change to the directory ...
by Paul Hutch
Wed Dec 05, 2018 1:44 pm
Forum: General discussion
Topic: STICKY: Pi 3 A+
Replies: 132
Views: 42228

Re: STICKY: Pi 3 A+

FYI, Newark now has the 3A+ in stock and the price is down to $25. They have also sold over 40,000 of their in stock 3B+'s.
by Paul Hutch
Sun Dec 02, 2018 3:54 pm
Forum: General discussion
Topic: Case for RPi 3A+ and Sense HAT?
Replies: 7
Views: 1068

Re: Case for RPi 3A+ and Sense HAT?

dckornbluh wrote:
Sun Dec 02, 2018 1:47 pm
The one that JamesPi123 recommended is out of stock so I guess she'll be a chilly pi for a bit.
FYI, only the "Smoke Gray" version is out of stock, the clear and other colors are in stock.
by Paul Hutch
Sun Dec 02, 2018 3:51 pm
Forum: General discussion
Topic: Is camera module really suitable for.24/7 streaming?
Replies: 16
Views: 1376

Re: Is camera module really suitable for.24/7 streaming?

There are so many factors that determine if a specific Raspberry Pi with a specific official camera module will be "reliable" in your particular application that it is not possible to give a definitive answer. I have Pi Zero W with an official camera module running 24/7 on my porch as a bird nest ca...
by Paul Hutch
Mon Nov 26, 2018 4:45 pm
Forum: General discussion
Topic: Pi user-change or create new
Replies: 12
Views: 1701

Re: Pi user-change or create new

For Raspberry Pi's in a network where I control the security, I just change the password of the pi user. For Pi's that will end up on a network I don't control the security of I create a new user and disable the pi user with these steps. Create a new user: sudo adduser newusername Add the new user t...
by Paul Hutch
Thu Nov 22, 2018 2:12 pm
Forum: General discussion
Topic: RPi 3 -> Serial port issue
Replies: 16
Views: 1695

Re: RPi 3 -> Serial port issue

That looks shielded so that helps but keep in mind TTL was designed/engineered only for short distance runs on PCB tracks, not for any wire length at all, that's why TIA-232, USB, IEEE 1284, I2C, etc. exist. If the character corruption isn't due to noise, I'd try a new USB/TTL cable, new Raspberry P...
by Paul Hutch
Wed Nov 21, 2018 6:06 pm
Forum: General discussion
Topic: RPi 3 -> Serial port issue
Replies: 16
Views: 1695

Re: RPi 3 -> Serial port issue

Garbage characters when you expect ASCII are very often a sign of noise corrupting the data stream. If the TTL wires are more than a few inches long try shortening them or shielding them.
by Paul Hutch
Wed Nov 21, 2018 4:21 pm
Forum: General discussion
Topic: RPi 3 -> Serial port issue
Replies: 16
Views: 1695

Re: RPi 3 -> Serial port issue

Getting a descriptive error message is a very useful result. Unfortunately with that particular message there are many possible sources for the problem but the good news is that to me it most likely does rule out your python code as the problem. A few of the possible sources of a "(device disconnect...
by Paul Hutch
Tue Nov 20, 2018 2:05 pm
Forum: General discussion
Topic: RPi 3 -> Serial port issue
Replies: 16
Views: 1695

Re: RPi 3 -> Serial port issue

When I saw that enable_uart=1 was not in your config.txt yesterday I knew that you could not be using the built-in UART but didn't have time to reply. Good to see you've got that part sorted out. The advise in my previous post applies just as much to the USB UART you are actually using. To carry out...
by Paul Hutch
Mon Nov 19, 2018 2:45 pm
Forum: General discussion
Topic: Backup PI SD card
Replies: 4
Views: 385

Re: Backup PI SD card

The best thing to do in my opinion is to take an image of your SD card using the DD command in terminal. I'm afraid I don't remember the exact command, so you may have to look around online. If you have another computer on the local network, setup a samba share and transfer the image over samba. Th...
by Paul Hutch
Mon Nov 19, 2018 2:16 pm
Forum: General discussion
Topic: RPi 3 -> Serial port issue
Replies: 16
Views: 1695

Re: RPi 3 -> Serial port issue

There are many possible causes for that symptom. Assuming you don't have serial data monitoring equipment to see exactly what is happening, I'd start by making sure there are timeouts on the wait for data to be received. Also I'd make sure the Pi only sends another command after it has received a re...
by Paul Hutch
Mon Nov 19, 2018 2:05 pm
Forum: General discussion
Topic: Something missing or something missed?
Replies: 22
Views: 1157

Re: Something missing or something missed?

The command I used, sudo apt update && sudo apt full-upgrade, does exactly the same thing as the commands you posted (with less typing). Thanks, I wasn't aware that dist-upgrade for apt-get from the blog post is equivalent to full-upgrade for apt (why do authors use different names for equivalent p...
by Paul Hutch
Mon Nov 19, 2018 1:58 pm
Forum: General discussion
Topic: Something missing or something missed?
Replies: 22
Views: 1157

Re: Something missing or something missed?

Actually... If you read the blog post, this is the *last* time that will happen because the system changes---that will be installed-- mean that, going forward, they won't do that. The old settings should be in an "oldconffiles" directory right under the home directory. Doh! Thanks for the correction.
by Paul Hutch
Fri Nov 16, 2018 9:45 pm
Forum: General discussion
Topic: Something missing or something missed?
Replies: 22
Views: 1157

Re: Something missing or something missed?

The only problem I had was the usual annoyance of my Desktop settings being reset (in spite of answering No to the prompt). The blog post says that this is supposed to be fixed in the new distro. Since it didn't fix it for you I'm guessing you have to do sudo apt-get update sudo apt-get dist-upgrad...
by Paul Hutch
Fri Nov 16, 2018 11:08 am
Forum: General discussion
Topic: STICKY: Pi 3 A+
Replies: 132
Views: 42228

Re: STICKY: Pi 3 A+

RaTTuS wrote:
Fri Nov 16, 2018 8:30 am
https://www.newark.com/raspberry-pi/ras ... dp/81Y5333
is what I find there ...
That's a Pi1A+.
by Paul Hutch
Fri Nov 16, 2018 1:34 am
Forum: General discussion
Topic: STICKY: Pi 3 A+
Replies: 132
Views: 42228

Re: STICKY: Pi 3 A+

I think someone needs to have a little chat with Premier Farnell as this https://www.newark.com/raspberry-pi/rpi3-modap/sbc-raspberry-pi-3-model-a-512mb/dp/80AC9303 page shows the Pi3A+ with a price of $47.30. Since it's a US site, that's without taxes. It looks like Newark is trying to move the ov...
by Paul Hutch
Sun Nov 04, 2018 11:46 pm
Forum: Advanced users
Topic: Enable remote login via USB Serial on first boot and after updates.
Replies: 6
Views: 1486

Re: Enable remote login via USB Serial on first boot and after updates.

will serial login work without any extra equipment? If the machine you want to connect the RasPi to has 3.3V TTL asynch serial I/O, then no extra hardware needed. For most PC's you'll need either a 3.3V TTL to USB or 3.3V TTL to TIA-232 adapter board. BTW It appears PM's aren't enabled right now, p...
by Paul Hutch
Thu Nov 01, 2018 5:46 pm
Forum: Advanced users
Topic: Enable remote login via USB Serial on first boot and after updates.
Replies: 6
Views: 1486

Re: Enable remote login via USB Serial on first boot and after updates.

Check out this thread for info on getting a USB Serial Adapter console login at boot. https://www.raspberrypi.org/forums/viewtopic.php?t=177728 This thread, https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=177076&p=1129209#p1129209, and the article it references, http://0pointer.de/blog/proje...
by Paul Hutch
Thu Nov 01, 2018 4:30 pm
Forum: General discussion
Topic: senseHat not detected on raspberry pi 3 model B
Replies: 3
Views: 187

Re: senseHat not detected on raspberry pi 3 model B

If you didn't do them already, you need to do the installation steps. https://www.raspberrypi.org/documentation/hardware/sense-hat/ Not on a standard Raspbian Full install (for quite a few years). Other setups may need that. Thanks, I didn't know the Foundation's instructions were so far out of dat...
by Paul Hutch
Thu Nov 01, 2018 3:38 pm
Forum: General discussion
Topic: senseHat not detected on raspberry pi 3 model B
Replies: 3
Views: 187

Re: senseHat not detected on raspberry pi 3 model B

If you didn't do them already, you need to do the installation steps.
https://www.raspberrypi.org/documentati ... sense-hat/
by Paul Hutch
Wed Oct 24, 2018 4:02 pm
Forum: General discussion
Topic: Error while installing pip
Replies: 8
Views: 1383

Re: Error while installing pip

Oops never mind in case you saw the first version of my post.

The 169.254.53.216 address is a link-local address which indicates you are not connected to a DHCP capable router on your LAN.
by Paul Hutch
Fri Oct 19, 2018 1:07 pm
Forum: General discussion
Topic: Connectivity problem on Pi 3 Model B
Replies: 5
Views: 412

Re: Connectivity problem on Pi 3 Model B

You should only ever use the designated private address ranges for your self assigned static IP addresses. Using any Internet routable addresses like 123.123.201.101 will very often lead to networking problems. See here for a list of allowed private addresses. https://en.wikipedia.org/wiki/Private_n...
by Paul Hutch
Fri Oct 19, 2018 1:00 pm
Forum: General discussion
Topic: Raspbian install not working
Replies: 2
Views: 282

Re: Raspbian install not working

Seems like it's either a bad uSD card or a bad copy or burn of Raspbian on the card. Try downloading a fresh copy of Raspbian and creating a new uSD. If that works then try putting the fresh copy of Raspbian on the old uSD card and see if that works, if it does you had a bad download or burn, if it ...
by Paul Hutch
Fri Oct 19, 2018 10:37 am
Forum: General discussion
Topic: SD card write count?
Replies: 15
Views: 1452

Re: SD card write count?

The table in your link says that "industrial" grade cards have wear leveling, but "consumer" grade cards do not. Edit: it actually says "advanced wear leveling", maybe the consumer cards have something basic. My understanding from professionally designing with FLASH for decades, especially raw FLAS...

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