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by MattHawkinsUK
Tue Jun 23, 2015 8:48 pm
Forum: General programming discussion
Topic: RPi as car ECU?
Replies: 33
Views: 35488

Re: RPi as car ECU?

Why is it that people always have a can't be done attitude rather than a can do one. It's not really people being deliberately negative it's just the reality that Linux isn't a real time operating system. If you can cope with unpredictable delays then it may appear real time. Is an ECU going to wor...
by MattHawkinsUK
Sat May 02, 2015 1:24 pm
Forum: Troubleshooting
Topic: why does GPIO not setup as output?
Replies: 31
Views: 4543

Re: why does GPIO not setup as output?

That looks like my example with a random class line inserted at the top. The script wasn't written with a class in mind so needs a lot more editing to get it to work.
by MattHawkinsUK
Thu Apr 23, 2015 12:33 pm
Forum: Python
Topic: Python driving 44780 LCD
Replies: 101
Views: 45523

Re: Python driving 44780 LCD

Hi! My Raspberry run Openwrt with python, I follows this http://www.raspberrypi-spy.co.uk/2012/07/16x2-lcd-module-control-using-python/ and modify but can not display text on LCD :-) Try increasing the timing constant values. Some screens are more sensitive to the values used : For example : # Timi...
by MattHawkinsUK
Thu Apr 23, 2015 11:57 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C not working
Replies: 17
Views: 2476

Re: I2C not working

Have you tried :

Code: Select all

sudo i2cdetect -y 0
I can't see the photo of the 2nd Pi but I suspect it is a Rev 1.
by MattHawkinsUK
Tue Apr 07, 2015 10:01 pm
Forum: General programming discussion
Topic: Need help with my Project DS 18B20
Replies: 4
Views: 875

Re: Need help with my Project DS 18B20

Breadboard just shows how the device is connected to the GPIO header. You aren't going to find a tutorial that perfectly matches your wires. Here is my tutorial : Raspberry Pi 1- Wire Digital Thermometer Sensor (DS18B20) It includes breadboard but you can make the connections using anything you like...
by MattHawkinsUK
Mon Apr 06, 2015 7:59 pm
Forum: Troubleshooting
Topic: USB and Ethernet do not function at all (solved)
Replies: 13
Views: 1446

Re: USB and Ethernet do not function at all

Have you downloaded the latest image from the download page and tried making a fresh image, preferably on a different SD card. Hardware problems are extremely rare and the most likely cause is an out-of-date image.
by MattHawkinsUK
Fri Apr 03, 2015 9:58 am
Forum: Raspbian
Topic: What update ruined my RPi's?
Replies: 50
Views: 5453

Re: What update ruined my RPi's?

Forgot updating. Download the latest Raspbian image and re-image the card.
by MattHawkinsUK
Mon Mar 23, 2015 11:34 pm
Forum: General discussion
Topic: Red Pi 2
Replies: 13
Views: 2207

Re: Red Pi 2

When they are available they usually appear on Aliexpress or DX. Allegedly ;)
by MattHawkinsUK
Mon Mar 23, 2015 11:27 pm
Forum: General discussion
Topic: External Battery Pack Recommendations?
Replies: 2
Views: 547

Re: External Battery Pack Recommendations?

I've used a selection of Ravpower and Lumsing batteries and they all work fine.
by MattHawkinsUK
Sat Mar 21, 2015 6:05 pm
Forum: Beginners
Topic: Python not working with the GPIO?
Replies: 16
Views: 2356

Re: Python not working with the GPIO?

Can you post your full Python script?

You will also need to call it using "sudo python led.py".
by MattHawkinsUK
Sat Mar 14, 2015 11:12 pm
Forum: Python
Topic: GPIO Python not working with crontab
Replies: 4
Views: 1316

Re: GPIO Python not working with crontab

Gordon is right. You need to use sudo crontab -e. I've used it in a few projects.

Here's my blog post on it :
http://www.raspberrypi-spy.co.uk/2013/0 ... sing-cron/
by MattHawkinsUK
Sat Mar 14, 2015 3:37 pm
Forum: Troubleshooting
Topic: Transfert SD card Pi_B+ > Pi_2 No Boot !
Replies: 6
Views: 867

Re: Transfert SD card Pi_B+ > Pi_2 No Boot !

The quickest solution is write a fresh card with the latest Raspbian.
by MattHawkinsUK
Thu Mar 12, 2015 1:06 pm
Forum: General discussion
Topic: Raspberry Pi as the successor of BBC Micro
Replies: 105
Views: 18586

Re: Raspberry Pi as the successor of BBC Micro

Never believed the BBC's attitude at the time. Today it all becomes a little bit clearer ...
by MattHawkinsUK
Wed Mar 11, 2015 11:14 pm
Forum: Troubleshooting
Topic: SOLVED - SD card space error
Replies: 5
Views: 883

Re: SOLVED - SD card space error

For anyone else that has problems with SD cards reporting the wrong size under Windows, you can use "SD Formatter" to format it. The standard Windows format utility can't remove Linux partitions. The process is really simple and SD Formatter is free! I wrote up the process here : How To Format Pi SD...
by MattHawkinsUK
Sun Mar 08, 2015 10:17 pm
Forum: General discussion
Topic: Self Adhesive PCB supports
Replies: 3
Views: 821

Re: Self Adhesive PCB supports

The PCB holes are 2.5mm.
by MattHawkinsUK
Sat Mar 07, 2015 8:28 am
Forum: Other projects
Topic: Any premade Solar options?
Replies: 5
Views: 1293

Re: Any premade Solar options?

Take a look at "PiJuice". It's a new add-on board designed to power a Pi via a solar panel and has an onboard battery. It has a clock and can turn the Pi on and off to save power ... especially at night.

I think it is intended for the A+,B+ and Pi2.
by MattHawkinsUK
Sat Mar 07, 2015 8:22 am
Forum: General discussion
Topic: Thermal Printer for Pi using Raspbian
Replies: 5
Views: 2315

Re: Thermal Printer for Pi using Raspbian

Depends on what size printer you need but the "Pipsta" printer works well and has lots of software support :

http://www.raspberrypi-spy.co.uk/2015/0 ... big-ideas/
by MattHawkinsUK
Thu Mar 05, 2015 10:56 pm
Forum: Troubleshooting
Topic: My Pi doesn't like some images
Replies: 4
Views: 688

Re: My Pi doesn't like some images

I think the answer is simply that Raspbian is well supported and the others are probably not.

It's all well and good other people offering features in other images but they need to build and support them properly. Do the authors claim they work on the Pi2?
by MattHawkinsUK
Thu Mar 05, 2015 10:45 pm
Forum: Beginners
Topic: Prevent Screen From Blanking \ Power Saving
Replies: 1
Views: 326

Re: Prevent Screen From Blanking \ Power Saving

Thanks that will be useful at some point.
by MattHawkinsUK
Thu Mar 05, 2015 10:24 pm
Forum: Troubleshooting
Topic: Raspberry pi 2 doesn't boot from any microSD card.
Replies: 10
Views: 997

Re: Raspberry pi 2 doesn't boot from any microSD card.

Have you prepared the cards with the latest SD card image?
by MattHawkinsUK
Thu Feb 12, 2015 5:11 pm
Forum: Off topic discussion
Topic: Microsoft windows 10 on pi2
Replies: 6
Views: 1328

Re: windows on pi2

Given how the question is worded the only answer is "yes".
by MattHawkinsUK
Wed Feb 11, 2015 10:42 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Having problems with B+ and DS18b20
Replies: 10
Views: 8419

Re: Having problems with B+ and DS18b20

I've updated my DS18B20 tutorial so it now works with the latest version of Rasbian :

Raspberry Pi 1- Wire Digital Thermometer Sensor

It requires a line to be added to the config.txt file as well as the usual two modprobe commands as mentioned by texy.
by MattHawkinsUK
Thu Oct 16, 2014 8:26 pm
Forum: Python
Topic: P5 connector BOARD pins
Replies: 5
Views: 1018

Re: P5 connector BOARD pins

So someone decided to use pin numbers, while someone else decided to use Broadcom numbers. The "someone" was the PCB designer! The 26 GPIO Pins have always been numbered 1-26 and they have always related to specific Broadcom GPIO signals. Everything else is just some other scheme. Just use GPIO.set...
by MattHawkinsUK
Wed Oct 15, 2014 4:04 pm
Forum: Beginners
Topic: (solved) Wifi connection
Replies: 25
Views: 2453

Re: Wifi adapter working with RPI?

Have you tried running startx and using the WiFi Config tool?
by MattHawkinsUK
Thu Oct 09, 2014 10:12 pm
Forum: HATs and other add-ons
Topic: 1080Pi - the First Full HD LCD add-on on Kickstarter NOW
Replies: 12
Views: 5607

Re: 1080Pi - the First Full HD LCD add-on on Kickstarter NOW

The Kickstarter page is wrong.
1080p is one of the standards of HD TV and indicates that the resolution is 1080 by 1920 pixels
1080p means a resolution of 1920x1080 not 1080x1920.

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