I odn’t know if I’ve been in a cave for the last few months – I certainly have for the last couple of weeks (literally), but when I came to program my little ESP8266 boards using the only trusty FTDI chip I have here in Spain (and as you can…
So Many Things to Do Video
I’ve been meaning to update the blog – and I just keep getting sidetracked with the many interesting possibilities of Node-Red…. so – I put a short video together here. Should be something of interest in it. https://www.youtube.com/watch?v=xoQ_Fs31xtM Pete Node-Red on The Raspberry Pi
Graphing Wonders
Tonight I’ve been building on my earlier work on graphing, if you read a few blogs back you’ll know I got some basic graphing running on the Raspberry Pi 2, taking MQTT data from a sensor and storing it in MYSQL. Well that was fine apart from the graphs having…
Pi 2 Pocket Control
Update July 2015: Hard to believe it is months since I wrote this – anyway a few of you have had trouble with this so I’m making some changes. Those of you who’ve been following my exploits for some time will know that initially I started using Arduino to control…
Pi Graphing Progress
Making great progress with the Raspberry Pi despite not knowing Linux from a hole in the ground a week ago. We’re at our place in Spain for a short break with limited facilities (I’ve ordered a USB scope for the next time we’re here). As of this morning, I’ve managed…
Node-Red Strangeness
THIS ONE HAS BEEN SOLVED – SEE “SOLUTION”. I freely admit to being utterly stumped. Having spent the day getting node-red on the Blackberry Pi2 I’ve made this simple page… an MQTT message coming in is passed out… and also goes to GPIO 0. This works – send a 1…
apt-get WHAT?
If like me you are a reluctant Linux user, dragged in merely because you want to make use of the new Raspberry Pi 2 in your projects (and I bought mine as a hub for my Arduino/ESP8266 projects) – you’ll be slowly coming to grips with meaningful terms like SUDO…
NodeMCU Broken?
For now I’m concentrating on achieving reliability with MQTT using the original library and C – and interfacing it to the likes of the Raspberry Pi 2, but it came to my attention for those of you using Lua right now that there seems to be a problem with the…
Domain Issues on Pi 2
So a little while ago, one of you helpful people in here gave me a tip when my Raspberry Pi 2 based CRON JOB started up and failed to send emails. I added MAILTO: pete@scargill.org to whatever I was working on and lo and behold the emails worked. But now…
Pi 2 Memory Boost
Or: How to get back that missing quarter gigabyte of RAM. I must admit, though I’m very pleased with my new Raspberry Pi as a potential controller for my various Arduino and ESP8266 boards, I was a bit bemused given the claim of 1GB of main memory to realise on…
Enter Bluefish for Pi and PC
If you’ve read my blog you will know I have a near pathological aversion to the command line – reminds me too much of DOS and the 90s. So when I got my new spiffy Raspberry Pi 2 (which I am really impressed with and which will almost definitely form…
Thanks
Just a quick note to those of you who come in here, are constructive and offer help and hopefully sometimes take away information… thanks for taking the time – and thanks for putting up with the name change of the blog – which got me away from reliance on WordPress.com. …
Cloud Security
Cloud security is as likely not something the average Internet of Things enthusiast thinks about on a daily basis but here we all are, embarking on a future where our houses and perhaps offices will be connected to the Internet to a degree never seen before. Many are already connected…
Flashing Lights on Raspberry Pi 2
So – having managed to get WordPress up and running on the P2 I thought it might be nice to step back toward the original plan and get some home control running. I like PHP so I thought that it might be nice to have a PHP page with some…
Raspberry Pi 2 VNC Error Message Solved
Today is getting better by the minute. I’ve been plagued with my new Raspberry Pi 2with a harmless but annoying message when remotely accessing it from my PC with UltraVNC. A box would pop up with GDIBUS Error.org freedesktop.PolicyKit1 Error.Failed:; An Authentication agent already exists for the given subject. …
Pi Stage 2
The NEXT hurdle in getting the Pi to be the central plank of a home control system – was to get emails working. I installed WordPress and of course the first thing I realised was that it would not send emails – a quick inspection – no SMTP folder… needs…
Raspberry Pi Permissions
As you’ll note elsewhere in the blog, I’ve been playing with WordPress (PHP/MYSQL etc) on the new Pi 2 – an hitting problems with permissions. Typical of a Windows users (I’m quite happy in CPANEL) the Linux commands mean very little to me and there’s enough to learn without taking…
More Pi Mysteries
Well, I thought I had the CRON thing cracked. I made my cron file….. with this inside it.. * * * * * /usr/bin/wget http://127.0.0.1/mqtt/examples/publish.php And sure enough – CRON runs the PHP page which publishes a couple of topics every minute as it should do, to my MOSQUITTO broker…
Raspberry Pi 2 startup
I’m using the Raspberry Pi 2 (note the 2 – i.e. the new one) – which up to now I’m quite happy with – still got a little way to go but I have this annoying message in the Raspbian desktop when it comes up (on powerup). Can anyone tell…
Bringing the Pi into the PC world
So you have your sparkly new Raspberry Pi and the first thing you need to do is remotely access it from the PC… and so you install TIGHTVNC… and put that on the PC and they talk to each other and…. no clipboard… This link got me out of a…