Raspberry Pi Forums

jbudd

Well I wasn't "planning" on storing anything there! The Pi with 100% full root fs has PiVPN installed on it, using wireshark. Currently wireshark is dumping a 40 - 50 MB file into /tmp every 20 minutes and the VPN isn't even in use. Obviously that's not a problem to discuss here. Edit - I have had /...

jbudd

At The Pi Hut, where Pi Zero W's are currently in stock at £13, you can buy 5 for £65 and the total shipping charge is £2.99. (UK, Royal Mail 1st class)

I did look at another authorised retailer but they were out of stock.

jbudd

Thanks jahboater.

A Pi is constrained by a) potentially only 256MB memory and b) limited writes before the SD card dies
I guess a) is why /tmp isn't a tmpfs filesystem?

What happens if a /tmp filesystem uses up the allocated memory - the Pi grinds to a halt, or frantic swapping?

jbudd

Yes, your code worked. Well mostly. The define statement and the file handling did not I'm not sure what you mean by the define statement: sunrise="${myarray[0]}" ? or ARG="-ISO 100 -drc med -co 10 -n -w 1024 -h 768 -ss 450 -tl 30000 -t 2147483647 -o /run/shm/$SCR.jpg" ? If it's the former, make su...

jbudd

I'm afraid your Pi is dead.

Either there was a voltage spike on one of the cables plugged in to it or maybe you fried it with static electricity.

You really should turn the power off before plugging / unplugging anything.

jbudd

I only just noticed this when trying to upgrade one of my Pies (8GB SD, Raspbian Buster Lite, Sept 2019) /tmp is just a directory not a filesystem and accumulated junk there caused the root filesystem to fill up. pi@APi:/ $ df -k Filesystem 1K-blocks Used Available Use% Mounted on /dev/root 7312912 ...

jbudd

I don't understand your Excel code but I think it's probably exactly what the shell script I offered above is trying to do.
Did you try it, were there problems?

jbudd

Is it possible that the message topic or contents are not actually identical when sent via the two brokers? Perhaps you have a trailing null \0 or carriage return \r character? I would test this by having the script print topic_sub, msg.topic and msg.payload, then exit. And pipe it's output through ...

jbudd

How do you obtain sunrise and sunset times and in what format? One possible solution is to save them in a file, expressed as the number of seconds since the Unix epoch, first line sunrise time, second line sunset time. (Obviously you would have to populate this file at startup and again at midnight)...

jbudd

... Chromium which synchronizes the web browser with Google ... I thought that the chromium browser is supposed to be "degooglised"? I prefer to share as little as possible of my life with organisations that consider me their property to sell. A good reason to struggle with Firefox ESR. And on the ...

jbudd

If you open port 22 to the internet, you very quickly get attempts to login to your Pi using lists of login ids and passwords. Install fail2ban and you can see them logged in /var/log/fail2ban.log I think that the computers trawling the internet for vulnerable devices tend to be programmed to evade ...

jbudd

"What data does the Raspberry Pi use and how does it produce new data?" sounds like a dumb question. But perhaps not... A lot of computer systems are "black boxes" for example the engine management system for a car - you can't see what goes on inside them but you know what data they accept and what ...

jbudd

The .img file is a single file containing all the contents of the disk/sd card it was created from, including the file systems eg /boot and their contents eg /boot/bootcode.bin. I have no idea what SO, RTEMS or BSP mean so I can't really comment about renaming .exe files as .img beyond it sounds a b...

jbudd

Current models of Pi are designed to distribute heat over the whole board, though obviously the CPU and other chips are hottest. For most efficient cooling the air should flow over the Pi from the least warm to the hottest bits which sugests sucking it in at the edges and out over the CPU. I tried m...

jbudd

I have never tried it since I don't have a chromebook. However: https://willhaley.com/blog/setup-raspbe ... hromebook/

jbudd

Tried giving pi a static op adress editing /etc/dhcp.conf.
Still the pi gets a wrong ip.

You shouldn't have to give the Pi a static IP, but if you must do, the file is /etc/dhcpcd.conf not /etc/dhcp.conf

jbudd

This appears to be a commercial installation type of use case. No, it is not: In my case, I am retired and am working benevolently for an association promoting environmental measurement stations. The stations are deployed at homes of people, who are willing to provide a station on their own expense...

jbudd

Windows offering to format the card is not an issue. Just say No. A Raspbian SD card has an ext4 partition which Windows cannot understand so it offers to format.

jbudd

I've tried to reflash image, but couldn't: Etcher says that the space is insufficient ... 32Mb. But initially the card (newest) had 64Gb. Does it mean that card is corrupted ? It does sound like it may be corrupted. Where did you buy it from? Use one of the programs listed at https://www.raymond.cc...

jbudd

Some of these things might already be in place. Sorry if I've missed them! I wish Raspbian gave me more confidence that I could plug something (USB stick, hard disk, keyboard, monitor, ...) into a running Pi and it would work, and not risk killing the Pi. I have the impression, possibly wrongly, tha...

jbudd

Thanks for the links Dougie & Steven

jbudd

I'm glad you got it working, it sounds like a really interesting use for a Pi.

Over in England we have the Meteorological Office and BBC to forecast the weather for us but it's dumbed down so far. When I feel the need for proper weather maps I look to the USAF!

jbudd

I do something similar to that using Node-Red.
Bash and python scripts collect statistics, reboot when requested etc.
Node-Red handles scheduling, linking processes together and (via the dashboard add-on) displaying a web interface with buttons, dials and graphs.

jbudd

Save in UNIX format if you're using notepad++ otherwise raspbian won't recognize it. create a blank file without any extension and name it ssh Actually the current release of Raspbian will accept files called ssh, ssh.txt and even SSH.TXT And wpa_supplicant.conf works even if it is written with Not...

jbudd

Can you post your entire wpa_supplicant.conf file here? (falsify the SSID and pasword strings)

Search found 1445 matches

Re: No /tmp filesystem

Re: Buying more than one Pi zero?

Re: No /tmp filesystem

Re: Shell script in init.d

Re: Pi Zero W appears to be dead after electrical short

No /tmp filesystem

Re: Shell script in init.d

Re: MQTT - Cloudmqtt (Working) Mosquitto (not) Same script

Re: Shell script in init.d

Re: Firefox ESR onRaspberry Pi B+

Re: Neccessity of iptables/fail2ban

Re: Data Usage and Production

Re: Embedded SO for Raspberry pi 2

Re: Case FAN : should it suck, or should it blow ?

Re: Setting up a pi with a chromebook

Re: Rpi can't connect to internet using eth0

Re: Future of raspberry pi - software related

Re: Can't connect to RPi4

Re: Can't connect to RPi4

Re: Future of raspberry pi - software related

Re: Weather Fax - need hardware advice

Re: Weather Fax - need hardware advice

Re: Shutdown via PHP

Re: Connecting Raspberry Pi to Android Phone

Re: RPi4 headless no connect