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hamishcunningham / pi-tronics

Source code for Raspberry Pi GATE projects.
http://pi.gate.ac.uk/
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Communication error on read word #109

Closed magusian closed 5 years ago

magusian commented 7 years ago

After a Raspbian update/upgrade, I get the following error:

/usr/sbin/mopi: /usr/sbin/mopicli not working: installation problem? (mopicli. Communications protocol err on read word.)

2x MoPi v3.0 /usr/sbin/mopi version 4.1 2x Raspberry Pi 2 Model b v1.1 Raspbian GNU/Linux 8 (jessie), image dated 05/07/2017, Kernal version: 4.9 (virgin image)

I have tested all possible permutations based on 2x Pi 2's, 2x MoPi's, an upgraded and a fresh Rasbian install, but get the same error with all combinations

Can you suggest how to fix?

Regards, Bradley

jjpesante commented 7 years ago

also having this issue with fresh installs on a pi2, a pi3, and a zero W, 05/07/2017 kernel 4.9, however, the mopi does work when run with 2016 build of raspian as long as it is not updated. has anyone found a solution?

CosmaP commented 7 years ago

I have the same problem with a Pi 3

SSDDscot commented 7 years ago

i cant remember the link but i changed my config file to include the bcm2708. it goes back to a recent update i think. sorry i cant be more help.

CosmaP commented 7 years ago

Essentially it is not really supported on Pi3.

https://pi.gate.ac.uk/posts/2016/12/19/good-news-and-bad/

hamishcunningham commented 7 years ago

The problem may not not the Pi 3 itself but the change in the way the kernel does i2c in the more recent raspbian.

See #110 -- if other people could try the workaround cited there (which has been reported once not to work) and see if it fixes this issue that would be cool...

On 11 October 2017 at 09:23, Cosma Papouis notifications@github.com wrote:

Essentially it is not really supported on Pi3.

https://pi.gate.ac.uk/posts/2016/12/19/good-news-and-bad/

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/hamishcunningham/pi-tronics/issues/109#issuecomment-335730731, or mute the thread https://github.com/notifications/unsubscribe-auth/AEMQlGtMzmgPf7sPK5Cvv43XaUtPIaKzks5srHsPgaJpZM4OZUcs .

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CosmaP commented 7 years ago

I will give it a go. But the mopi is actually doing what I need at the moment. That is the ability to headlessly start/stop the pi cleanly without having to ssh and issue a shutdown command.

The rest of the functionality would be nice, but I can live without it.

When they release a Pi3 compatible version I will get one and move my current one to a Pi1 that I am using as "house" Pi.

____

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Mobile: 07956 323938 Skype: Cosma.Papouis

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Save electricity - do you really need to send this email? Save your own energy - do you really need to read this email?

On 11 October 2017 at 11:04, Hamish Cunningham notifications@github.com wrote:

The problem may not not the Pi 3 itself but the change in the way the kernel does i2c in the more recent raspbian.

See #110 -- if other people could try the workaround cited there (which has been reported once not to work) and see if it fixes this issue that would be cool...

On 11 October 2017 at 09:23, Cosma Papouis notifications@github.com wrote:

Essentially it is not really supported on Pi3.

https://pi.gate.ac.uk/posts/2016/12/19/good-news-and-bad/

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/hamishcunningham/pi-tronics/issues/109#issuecomment- 335730731, or mute the thread https://github.com/notifications/unsubscribe-auth/ AEMQlGtMzmgPf7sPK5Cvv43XaUtPIaKzks5srHsPgaJpZM4OZUcs .

--

Hamish Cunningham Professor of Computer Science, University of Sheffield, UK

Phone: 07740 149 842 <07740%20149842> hamish@gate.ac.uk https://twitter.com/@HCunningham https://hamish.gate.ac.uk https://wegrow.social https://wegrow.social/ https://gate.ac.uk https://pi.gate.ac.uk https://www.sheffield.ac.uk/dcs/people/academic/hcunningham https://www.sheffield.ac.uk/dcs/people/academic/hcunningham https://www.sheffield.ac.uk/news/nr/aquaponics-fish-food-farm-1.581536 https://tinyurl.com/savetheworldwithfishpoo

WeGrow.social: https://twitter.com/WeGrowSocial https://www.facebook.com/WeGrowSocial https://blog.wegrow.social https://www.instagram.com/wegrowsocial https://wegrow.social https://www.youtube.com/channel/UCG3ZPbhbJ1yoa0fxMnaOcdg/videos

On BBC Radio Sheffield:

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/hamishcunningham/pi-tronics/issues/109#issuecomment-335761264, or mute the thread https://github.com/notifications/unsubscribe-auth/AAzIx2qXfc2F6LzhoI6vNxzucr5_WV6Lks5srJKpgaJpZM4OZUcs .

CosmaP commented 7 years ago

Do you mean this

https://pi.gate.ac.uk/pages/mopi.html#section-10.1.

Cosma Papouis

Skype: Cosma.Papouis

e: mailto:cosma.papouis@uatechserv.com cosma.papouis@uatechserv.com

From: Hamish Cunningham [mailto:notifications@github.com] Sent: 11 October 2017 11:04 To: hamishcunningham/pi-tronics pi-tronics@noreply.github.com Cc: Cosma Papouis cosma@papouis.net; Comment comment@noreply.github.com Subject: Re: [hamishcunningham/pi-tronics] Communication error on read word (#109)

The problem may not not the Pi 3 itself but the change in the way the kernel does i2c in the more recent raspbian.

See #110 -- if other people could try the workaround cited there (which has been reported once not to work) and see if it fixes this issue that would be cool...

On 11 October 2017 at 09:23, Cosma Papouis <notifications@github.com mailto:notifications@github.com > wrote:

Essentially it is not really supported on Pi3.

https://pi.gate.ac.uk/posts/2016/12/19/good-news-and-bad/

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/hamishcunningham/pi-tronics/issues/109#issuecomment-335730731, or mute the thread https://github.com/notifications/unsubscribe-auth/AEMQlGtMzmgPf7sPK5Cvv43XaUtPIaKzks5srHsPgaJpZM4OZUcs .

--

Hamish Cunningham Professor of Computer Science, University of Sheffield, UK

Phone: 07740 149 842 hamish@gate.ac.uk mailto:hamish@gate.ac.uk https://twitter.com/@HCunningham https://hamish.gate.ac.uk https://wegrow.social https://wegrow.social/ https://gate.ac.uk https://pi.gate.ac.uk https://www.sheffield.ac.uk/dcs/people/academic/hcunningham https://www.sheffield.ac.uk/dcs/people/academic/hcunningham https://www.sheffield.ac.uk/news/nr/aquaponics-fish-food-farm-1.581536 https://tinyurl.com/savetheworldwithfishpoo

WeGrow.social: https://twitter.com/WeGrowSocial https://www.facebook.com/WeGrowSocial https://blog.wegrow.social https://www.instagram.com/wegrowsocial https://wegrow.social https://www.youtube.com/channel/UCG3ZPbhbJ1yoa0fxMnaOcdg/videos

On BBC Radio Sheffield:

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/hamishcunningham/pi-tronics/issues/109#issuecomment-335761264 , or mute the thread https://github.com/notifications/unsubscribe-auth/AAzIx2qXfc2F6LzhoI6vNxzucr5_WV6Lks5srJKpgaJpZM4OZUcs . https://github.com/notifications/beacon/AAzIx2S35_Ngkz72QbDDbY4lHTYL40raks5srJKpgaJpZM4OZUcs.gif

Slewrate13 commented 5 years ago

Hi Everybody, I'm trying to use extended feature of the Mopi1 I have buy some weeks ago. But I always get a "Communication protocol error on read word" as answer when trying to use "mopi" or "mopicli" command. The hardware function seems to be all right. Only "sudo mopi -d" is working. I've read no error message during installation. I've checked the I2C and I found BMC2835 I've tried with 2 different RPi zero and an old RPi B. Sorry for my poor English. I've tried to follow #109 and #110 questions but I did not found the solution. Best Marc

hamishcunningham commented 5 years ago

I think the workaround is described here: https://github.com/raspberrypi/firmware/issues/828 hth h