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by yoctopuce
Sun Jun 17, 2018 5:02 am
Forum: Automation, sensing and robotics
Topic: Using a Yocto-volt sensor on a Raspberry pi
Replies: 3
Views: 771

Re: Using a Yocto-volt sensor on a Raspberry pi

Chances are that you did not install the Yoctopuce python library properly. You should read that page:

www.yoctopuce.com/EN/article/for-the-be ... ce-modules

Don't hesitate to contact Yoctopuce support directly if you need more help.
by yoctopuce
Fri May 26, 2017 2:34 pm
Forum: Automation, sensing and robotics
Topic: Yoctopuce USB Thermocouple doesn't work on Zero W
Replies: 1
Views: 761

Re: Yoctopuce USB Thermocouple doesn't work on Zero W

We have submitted a bug and are working with the community to solve this issue.

Here is the thread: https://github.com/raspberrypi/linux/is ... -303058507
by yoctopuce
Tue May 16, 2017 1:31 pm
Forum: Raspbian
Topic: USB bug with Raspberry Pi Zero
Replies: 1
Views: 494

USB bug with Raspberry Pi Zero

Hi, We have found a bug in the USB stack of the Raspberry PI image. Using an USB analyser we have found that sometime the Raspberry Pi Zero send USB packets with Invalid CRC. The things that is strange is that this issue only affect Raspberry Pi Zero with Raspbian image after March 2016. the same im...
by yoctopuce
Sun Oct 07, 2012 6:14 am
Forum: General discussion
Topic: Would the PI be able to control something like this? (USB Relay board)
Replies: 19
Views: 8747

Re: Would the PI be able to control something like this? (U

You may want to have a look here:

http://www.yoctopuce.com/EN/products/us ... octo-relay

USB, no driver needed, API available in most common programming languages, you even can use a PI to drive it.

You can have a look at the competition too : http://www.phidgets.com/
by yoctopuce
Tue Oct 02, 2012 7:56 am
Forum: Automation, sensing and robotics
Topic: Temperature sensor
Replies: 12
Views: 13679

Re: Temperature sensor

We just completed a similar project with a temperature sensor connected to the Pi, in Python (see http://www.yoctopuce.com/EN/article/cook-and-hold-with-raspberry-pi-video ). We have used a thermocouple, but the same API can be used with an ambiant temperature sensor, which precision can go down to ...
by yoctopuce
Tue Oct 02, 2012 7:49 am
Forum: Troubleshooting
Topic: USB packet loss.
Replies: 253
Views: 73571

Re: USB packet loss.

We have been able to successfully complete a first real world project using our modules, using "dwc_otg.speed=1". It involves is some networking (a simple web service), polling an USB sensor, a few threads running in Python, and it works now reliably (more details on http://www.yoctopuce.com/EN/arti...
by yoctopuce
Fri Sep 21, 2012 7:21 am
Forum: Troubleshooting
Topic: USB packet loss.
Replies: 253
Views: 73571

Re: USB packet loss.

We have run some tests today to validate the tentative fixes. First we have run rpi-update to get the latest fix. Here is my cmdline.txt and the kernel version [email protected]:/home/pi# more /boot/cmdline.txt dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/m...
by yoctopuce
Wed Sep 12, 2012 4:57 am
Forum: Troubleshooting
Topic: USB packet loss.
Replies: 253
Views: 73571

Re: USB packet loss.

People talk about USB working properly but nobody is prepared to say what this means. How many things can you hang off one usb hub on a low speed computer like the pi. Look back at the beginning of this thread: a single USB 1.1 HID device can already cause the Pi to drop packets. We have sent to th...
by yoctopuce
Thu Jul 12, 2012 12:26 pm
Forum: Troubleshooting
Topic: USB packet loss.
Replies: 253
Views: 73571

Re: USB packet loss.

Bad news for Raspberry Pi users today: - Gordon informed us by mail that he was "stuck on other work", so it is unlikely that we will get a fix for the issue in the near future. - Although we have proved that the problem is on Raspberry side, and Gordon has hinted it may affect any USB 1.x device (e...
by yoctopuce
Wed Jun 06, 2012 5:23 am
Forum: Troubleshooting
Topic: USB packet loss.
Replies: 253
Views: 73571

Re: USB packet loss.

youngsyt, thexman & al: I am all with you that this issue needs a resolution, but at this point we need some patience. We have shipped to the Raspi team USB devices with a special firmware that will help to reproduce and track the issue. One of them has already arrived in UK, the other will need som...
by yoctopuce
Sat May 19, 2012 9:21 pm
Forum: Troubleshooting
Topic: USB packet loss.
Replies: 253
Views: 73571

Re: USB packet loss.

We are in contact with Eben and are working on the issue. Following there instructions we have run the same test again with some debug/trace function of the Linux kernel activated. The result confirm that sometime on or two USB packets are not reported by the Linux USB "driver"
by yoctopuce
Wed May 16, 2012 4:41 pm
Forum: Troubleshooting
Topic: USB packet loss.
Replies: 253
Views: 73571

Re: USB packet loss.

Just out of curiosity, are you use the default kernel that comes with your distro of choice, or are you using an updated kernel off github? We have try the two official image that are available on the download page and the latest kernel (using the Easy firmware updating tool from Hexxeh). In all ca...
by yoctopuce
Wed May 16, 2012 8:38 am
Forum: Troubleshooting
Topic: USB packet loss.
Replies: 253
Views: 73571

Re: USB packet loss.

Hi, We have found a serious issue on the raspberry PI USB stack (or at last the HID USB stack). We produce USB device and have found that we often get missing packet. We have create an specific firmware illustrate the problem. This debug protocol is very simple the Raspberry will send one packet of ...
by yoctopuce
Thu May 03, 2012 4:09 pm
Forum: Other projects
Topic: A basic acrylic enclosure for developers
Replies: 29
Views: 9648

Re: A basic acrylic enclosure for developers

<r>Dave_G_2 said: <br/> <br/> <br/> <br/> Having a look at the photographs of the housings again, I had an idea which could help alleviate the possible "capacitor" effect and put paranoiacs like me more at ease.<br/> <br/> <URL url="http://www.freeimagehosting.net/sy24r">http://www.freeimagehosting....
by yoctopuce
Mon Apr 30, 2012 4:51 pm
Forum: Troubleshooting
Topic: USB packet loss.
Replies: 253
Views: 73571

Re: USB packet loss.

<t>We too are experiencing some random packet drop.<br/> <br/> Our USB stack use the libusb-1.0 and has been tested on multiples architecture (i386, AMD64 and ARM) with success. We are able to compile and run our stack on Raspberry Pi but we have some packet that "disappear". We get no error form th...
by yoctopuce
Mon Apr 30, 2012 7:52 am
Forum: Other projects
Topic: A basic acrylic enclosure for developers
Replies: 29
Views: 9648

Re: A basic acrylic enclosure for developers

<r>The enclosure is made of generic acrylic glass, which is indeed prone to accumulate electrostatic charges that you might bring to it. It is therefore recommended not to rub the enclosure on wool sweaters or cats.<br/> <br/> No, more seriously: acrylic glass is commonly used to build custom enclos...
by yoctopuce
Fri Apr 27, 2012 3:07 am
Forum: Other projects
Topic: A basic acrylic enclosure for developers
Replies: 29
Views: 9648

Re: A basic acrylic enclosure for developers

calidor said:


Hi Yoctopuce,

I got my case yesterday - looks really good. Now all i need is a Pi to put in it!



Great! we love happy customers ...   
by yoctopuce
Sat Apr 21, 2012 3:28 pm
Forum: Other projects
Topic: A basic acrylic enclosure for developers
Replies: 29
Views: 9648

Re: A basic acrylic enclosure for developers

<t>HansH said: <br/> <br/> <br/> Can't you just sent it by simple mail, that would save a lot of costs...<br/> <br/> Currently you charge (for europe)  CHF 15,- shipping cost for a item of CHF 8.50 ....<br/> <br/> Disassembled it would just fit in a envelope...<br/> <br/> I was ordering one until I ...
by yoctopuce
Fri Apr 20, 2012 5:42 pm
Forum: Other projects
Topic: A basic acrylic enclosure for developers
Replies: 29
Views: 9648

Re: A basic acrylic enclosure for developers

The enclosure is available:

http://www.yoctopuce.com/EN/pr.....ts/raspbox

shipping will start Monday.
by yoctopuce
Fri Apr 20, 2012 5:37 pm
Forum: Other projects
Topic: A basic acrylic enclosure for developers
Replies: 29
Views: 9648

Re: A basic acrylic enclosure for developers

<t>redman684 said: <br/> <br/> <br/> You could make a slit into the busses and stick the corners of the Pi into them. Or use a smal bus, a large bus and a thick washer with a square files out in between. (I hope I've made myself clear, or should I make a drawing?)<br/> <br/> <br/> <br/> This is quit...
by yoctopuce
Fri Apr 20, 2012 8:27 am
Forum: Other projects
Topic: A basic acrylic enclosure for developers
Replies: 29
Views: 9648

Re: A basic acrylic enclosure for developers

<r>Montala said:<br/> <br/> <br/> I am not keen on the logo shown on the top personally… shame it couldn"t be a Raspberry… or could it?<br/> <br/> <br/> According to there trademark rules we need a trademark license to do sell a product with the logo. We have send an email to Liz to clarify this poi...
by yoctopuce
Thu Apr 19, 2012 4:37 pm
Forum: Other projects
Topic: A basic acrylic enclosure for developers
Replies: 29
Views: 9648

Re: A basic acrylic enclosure for developers

We have built a basic enclosure to protect our precious Raspberry PI during our tests. Are other people interested by such thing ? We could easily ship them as early as Monday, probably for less than 10$ if there is enough demand. The logo on the top could even be customized.

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