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by wayner
Mon May 16, 2016 9:15 pm
Forum: General discussion
Topic: Plus ca change... Pi Zero 1.3 now OOS at Adafruit
Replies: 31
Views: 6138

Re: Plus ca change... Pi Zero 1.3 now OOS at Adafruit

And some of us North Americans don't even have a Micro Center in our country. #wethenorth
by wayner
Mon May 16, 2016 7:38 pm
Forum: General discussion
Topic: Plus ca change... Pi Zero 1.3 now OOS at Adafruit
Replies: 31
Views: 6138

Re: Plus ca change... Pi Zero 1.3 now OOS at Adafruit

How about some love for the west side of the pond?

Edit - And PiHut only appears to be selling £27 kits, not individual Pi Zero boards.
by wayner
Mon May 16, 2016 6:56 pm
Forum: General discussion
Topic: Plus ca change... Pi Zero 1.3 now OOS at Adafruit
Replies: 31
Views: 6138

Plus ca change... Pi Zero 1.3 now OOS at Adafruit

So it looks like the Raspberry Pi v1.3 is "available" but the availability is about the same as the old Zero - that is all versions (board alone, kits, etc) are Out of Stock, at least at Adafruit. Note: Due to popular demand, there might be some delay in shipping products containing Pi Zero! Note: A...
by wayner
Mon Apr 25, 2016 12:24 am
Forum: General discussion
Topic: Do Pi Zeros really exist?
Replies: 15
Views: 2613

Re: Do Pi Zeros really exist?

Adafruit purports to sell Pi Zeros for $5 but I don't know that they have ever had that product item in stock. From what I have heard when they have stock they prefer to sell them in bundles. And on both products I have set up a notification weeks ago without ever getting a notification that the pro...
by wayner
Mon Apr 25, 2016 12:03 am
Forum: General discussion
Topic: Do Pi Zeros really exist?
Replies: 15
Views: 2613

Re: Do Pi Zeros really exist?

Even the bundles seem permanently OOS at Adafruit. But I don't need more USB micro cables. microSD cards or power supplies, I have lots of those. I just want a Pi Zero. Bundling so that they cost the same as a Pi3 doesn't make much sense as then I may as well just but a Pi3.
by wayner
Sun Apr 24, 2016 11:21 pm
Forum: General discussion
Topic: Do Pi Zeros really exist?
Replies: 15
Views: 2613

Re: Do Pi Zeros really exist?

And maybe unicorns as well.
by wayner
Sun Apr 24, 2016 10:42 pm
Forum: General discussion
Topic: Do Pi Zeros really exist?
Replies: 15
Views: 2613

Do Pi Zeros really exist?

They are still pretty much impossible to find. I think there are more sightings of Elvis than of the Pi Zero. What's going on?

I have been waiting for a notification of the device being in-stock at Adafruit for months.
by wayner
Wed Mar 30, 2016 11:27 am
Forum: General discussion
Topic: Pi Zero
Replies: 17
Views: 2597

Re: Pi Zero

But why is it that demand >>> supply more than four months after the Zero was announced? The Pi3 was barely a twinkle in someone's eye when that post was last updated. Pi3s seem very plentiful and easy to get yet they were announced only a month ago. Why not just make a shiteload of Zeros and balan...
by wayner
Wed Mar 30, 2016 3:31 am
Forum: General discussion
Topic: Pi Zero
Replies: 17
Views: 2597

Re: Pi Zero

But why is it that demand >>> supply more than four months after the Zero was announced? The Pi3 was barely a twinkle in someone's eye when that post was last updated. Pi3s seem very plentiful and easy to get yet they were announced only a month ago. Why not just make a shiteload of Zeros and balanc...
by wayner
Wed Mar 30, 2016 3:05 am
Forum: General discussion
Topic: New UPS for Raspberry Pi - S.USV
Replies: 10
Views: 1996

Re: New UPS for Raspberry Pi - S.USV

The capability to charge the battery from a solar panel would be nice for remote applications that don't have connections to the grid.
by wayner
Wed Mar 30, 2016 2:59 am
Forum: General discussion
Topic: Pi Zero
Replies: 17
Views: 2597

Re: Pi Zero

Posting to a thread that hasn't been updated with relevant info since Feb 4 isn't very helpful. Is there really no update since that date? I have a notification set at Adafruit for when they are in stock, but I have not been pinged - so they don't seem to be getting much, if any, stock. I agree with...
by wayner
Thu Mar 03, 2016 3:21 am
Forum: Other projects
Topic: Solar power for the summer?
Replies: 4
Views: 1334

Re: Solar power for the summer?

Have you looked at MoPi for power management https://pi.gate.ac.uk/pages/mopi.html I tried to build a model A+ system with a MoPi, solar panel and Eneloop AA rechargeable batteries. I also tried a lead acid battery as well. It kind of worked as it ran off battery and solar but for some reason the ba...
by wayner
Tue Jun 30, 2015 2:42 am
Forum: Raspbian
Topic: What files go in which folder structure
Replies: 3
Views: 1473

What files go in which folder structure

The default folder structure for user files is off of home (ie. /home/pi) but in Linux there appears to be a suggested spot for where one puts certain types of files. Where should I put python code files? Should I put them in home or is there some other suggested place? What about shell scripts? Wha...
by wayner
Mon Jun 29, 2015 8:43 pm
Forum: General discussion
Topic: What is the best way to send data from one Pi to another?
Replies: 27
Views: 7878

Re: What is the best way to send data from one Pi to another

FYI - the way that I ended up doing this is setting up SSH keys between the two systems(which isn't necessary but makes things a bit easier) and then just running a local python program that remotely runs a python program passing arguments via SSH to run a single remote python file (rather than an i...
by wayner
Mon Jun 29, 2015 8:13 pm
Forum: Automation, sensing and robotics
Topic: Temperature reading project
Replies: 2
Views: 668

Re: Temperature reading project

I have used this project as this basis for temperature sensing, storing the temperature to a SQLite database and building a web UI for reporting. However it doesn't cover humidity.

http://raspberrywebserver.com/cgiscript ... ogger.html
by wayner
Mon Jun 29, 2015 1:24 pm
Forum: Raspbian
Topic: Can't get passwordless SSH to work from Pi to Pi
Replies: 28
Views: 8103

Re: Can't get passwordless SSH to work from Pi to Pi

I apologize - the database wasn't in the cgi-bin folder, but all of my web page code was there. In this instance the database was put into the /var/www/ directory tree and www-data was the owner, at least that is how it was done in the code from the web page that I linked to. There was a cron job th...
by wayner
Sun Jun 28, 2015 9:58 pm
Forum: Raspbian
Topic: Can't get passwordless SSH to work from Pi to Pi
Replies: 28
Views: 8103

Re: Can't get passwordless SSH to work from Pi to Pi

The reason that I wanted to do this as root is that I am updating a database that is in the /usr/lib/cgi-bin folder which requires superuser access, does it not? For the most part I am following a process that I am borrowing from this webpage: Anyhow, doing an su root and doing the keygen and ssh-co...
by wayner
Sun Jun 28, 2015 6:54 pm
Forum: Raspbian
Topic: Can't get passwordless SSH to work from Pi to Pi
Replies: 28
Views: 8103

Re: Can't get passwordless SSH to work from Pi to Pi

But in this instance I am running a python program as root (as in sudo python myfile.py) in a cron job. The cron job is using paramiko to run a ssh session that runs a python job on a remote server. Everything works fine when I run the job using my normal pi user, but when I run it using sudo, or ru...
by wayner
Sun Jun 28, 2015 4:09 pm
Forum: Raspbian
Topic: Can't get passwordless SSH to work from Pi to Pi
Replies: 28
Views: 8103

Re: Can't get passwordless SSH to work from Pi to Pi

Ok I just ran across a minor glitch related to this. I can get everything working properly using the regular pi account but when I try to run the job as a cron job using the root account it fails as there is no authentication set. This also fails when trying to run the script from the command prompt...
by wayner
Mon Jun 22, 2015 11:02 pm
Forum: General discussion
Topic: Does a Pi Server need a UPS in UK?
Replies: 6
Views: 630

Re: Does a Pi Server need a UPS in UK?

A MoPi with a battery pack of 6xAA batteries attached might also do the trick cheaper, smaller and your Pi can be aware of when the mains dies.
by wayner
Mon Jun 22, 2015 6:55 pm
Forum: General discussion
Topic: Power consumption of Pi plus peripherals
Replies: 12
Views: 1843

Re: Power consumption of Pi plus peripherals

I was hasty in saying that things were working better with a Lead acid battery. The system lasted longer since I had a larger battery but it looked just like before - it appears that the batteries were not charging during the day. The solar panels seemed to take over providing power during the day, ...
by wayner
Fri Jun 19, 2015 3:01 pm
Forum: General discussion
Topic: Power consumption of Pi plus peripherals
Replies: 12
Views: 1843

Re: Power consumption of Pi plus peripherals

Things are looking better with the lead acid battery. I swapped batteries at 11 pm last night and it has been running for twelve hours. Initial voltage was 12.5V (all voltage readings are from the MoPi simbamon program) and the discharge decay was very slow through the night as the batteries only we...
by wayner
Fri Jun 19, 2015 3:16 am
Forum: General discussion
Topic: Power consumption of Pi plus peripherals
Replies: 12
Views: 1843

Re: Power consumption of Pi plus peripherals

Ok - I have replaced my 10 pack of AA NiMH with a 12V 4Ah lead acid battery - I had a spare for my security system. I used my multimeter to check the current draw of my system and is oscillated from 95 mA to 140mA, even when I was continuously pinging the Pi and also running an SSH session and cat'i...
by wayner
Thu Jun 18, 2015 10:28 pm
Forum: General discussion
Topic: Power consumption of Pi plus peripherals
Replies: 12
Views: 1843

Re: Power consumption of Pi plus peripherals

But doesn't the Instapark charge controller (linked to above) playing the role of a current/voltage limiter? I do also have a 12V lead acid battery that I could use as well as I am not too concerned about weight.
by wayner
Thu Jun 18, 2015 8:19 pm
Forum: General discussion
Topic: Power consumption of Pi plus peripherals
Replies: 12
Views: 1843

Re: Power consumption of Pi plus peripherals

Thanks guys, good info. The Solar charge controller is form Instapark - this one http://www.instapark.com/solar-power-pa ... t-12v.html

The batteries are NiMH. The solar panel says 15V 350mA 5.25W

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