reef-pi :: An opensource reef tank controller based on Raspberry Pi.

[Ranjib]

That would be a negative, I did not know I had to do anything like that. Is it obvious once I get there?

Nah :-) , you know you are using a feature that was not released till recently (not reef-pi, the actual pi and Linux kernel)

 

[philshel]

Example here : http://blog.oddbit.com/2017/09/26/some-notes-on-pwm-on-the-raspberry-pi/
Just edit the /boot/config.txt and dtoverlay pwm2chan module, that’s all,

Ummm, that's a lot more than editing /boot/config.txt. Not sure I'm up to that.

 

[Ranjib]

Ummm, that's a lot more than editing /boot/config.txt. Not sure I'm up to that.

I think you mis-understood. you dont have to do anything other than editing /boot/config.txt and reboot pi. I shared that article because it has the example of what needs to be changed in /boot/config.txt. You dont need anything else from that article.

Just to summarize, you need the following line in /boot/config.txt

dtoverlay=pwm-2chan

and reboot pi. Thats all you need to use reef-pi with Pi based pwm (2 channels only)

 

[philshel]

I think you mis-understood. you dont have to do anything other than editing /boot/config.txt and reboot pi. I shared that article because it has the example of what needs to be changed in /boot/config.txt. You dont need anything else from that article.

Just to summarize, you need the following line in /boot/config.txt

dtoverlay=pwm-2chan

and reboot pi. Thats all you need to use reef-pi with Pi based pwm (2 channels only)

Ok, I'll give that a try. Thank you as always.

 

[Harry Rayner]

Hi all, sorry to ask a really simple question but can this be done using the original raspberry pi?

 

[Harry Rayner]

Hi all, sorry to ask a really simple question but can this be done using the original raspberry pi?

Hi all, I’ve had a look at it appears I need a raspberry pi 3 or a zero, does it matter if it’s the 3 b or the 3b+??

 

[Zephrant]

Works great on the zero, no need for anything more.

 

[Ranjib]

Hi all, sorry to ask a really simple question but can this be done using the original raspberry pi?

I have not used pi A (original one) but the package we build for pi zero works flawlessly with pi b+. I think it will work fine on pi a as well , but I have not personally tested it . Pi 3/2/zero/b+ all should be kosher

 

[Harry Rayner]

Works great on the zero, no need for anything more.

Brilliant stuff, I’m going to give it a go and see how it works out, will try and save a bit more cash.

 

[philshel]

I think you mis-understood. you dont have to do anything other than editing /boot/config.txt and reboot pi. I shared that article because it has the example of what needs to be changed in /boot/config.txt. You dont need anything else from that article.

Just to summarize, you need the following line in /boot/config.txt

dtoverlay=pwm-2chan

and reboot pi. Thats all you need to use reef-pi with Pi based pwm (2 channels only)

Ok, I'm about to give up on this and just use the breakout board. I have added the line, purged the DB and all I get now is "ERROR: lighting-subsystem: Failed to set pwm value. Error: write /sys/class/pwm/pwmchip0/pwm0/duty_cycle: invalid argument" It trips for both pwm0 and pwm1.

 

[Ranjib]

Brilliant stuff, I’m going to give it a go and see how it works out, will try and save a bit more cash.

If you are using pi zero , I’ll recommend no t using GUI mode and install only raspbian lite, aka text only mode

 

[Ranjib]

Ok, I'm about to give up on this and just use the breakout board. I have added the line, purged the DB and all I get now is "ERROR: lighting-subsystem: Failed to set pwm value. Error: write /sys/class/pwm/pwmchip0/pwm0/duty_cycle: invalid argument" It trips for both pwm0 and pwm1.

Ok, it means pwm is now loaded but probably a reef-pi bug is causing trouble . Can you share the earlier line in the log? Where it says setting pwm values ..?
I am assuming you are using 2.0.0-beta-5 , can you share your pwm frequency (available on configuration-> settings ) and light setting, so that I can reproduce it

 

[philshel]

Ok, it means pwm is now loaded but probably a reef-pi bug is causing trouble . Can you share the earlier line in the log? Where it says setting pwm values ..?
I am assuming you are using 2.0.0-beta-5 , can you share your pwm frequency (available on configuration-> settings ) and light setting, so that I can reproduce it

Yes using beta-5.
Jul 08 12:33:54 Reef-Pi reef-pi[319]: 2018/07/08 12:33:54 lighting-subsystem: Setting PWM value: 89 at channel: 0
Jul 08 12:33:54 Reef-Pi reef-pi[319]: 2018/07/08 12:33:54 ERROR: lighting-subsystem: Failed to set pwm value. Error: write /sys/class/pwm/pwmchip0/pwm0/duty_cycle: invalid argumen
Jul 08 12:33:54 Reef-Pi reef-pi[319]: 2018/07/08 12:33:54 lighting-subsystem: Setting PWM value: 0 at channel: 1
Jul 08 12:33:54 Reef-Pi reef-pi[319]: 2018/07/08 12:33:54 ERROR: lighting-subsystem: Failed to set pwm value. Error: write /sys/class/pwm/pwmchip0/pwm1/duty_cycle: invalid argumen
Jul 08 12:34:24 Reef-Pi reef-pi[319]: 2018/07/08 12:34:24 lighting-subsystem: Setting PWM value: 89 at channel: 0

The pwm setting installed at "100" and I did not change it.

 

[Ranjib]

Yes using beta-5.
Jul 08 12:33:54 Reef-Pi reef-pi[319]: 2018/07/08 12:33:54 lighting-subsystem: Setting PWM value: 89 at channel: 0
Jul 08 12:33:54 Reef-Pi reef-pi[319]: 2018/07/08 12:33:54 ERROR: lighting-subsystem: Failed to set pwm value. Error: write /sys/class/pwm/pwmchip0/pwm0/duty_cycle: invalid argumen
Jul 08 12:33:54 Reef-Pi reef-pi[319]: 2018/07/08 12:33:54 lighting-subsystem: Setting PWM value: 0 at channel: 1
Jul 08 12:33:54 Reef-Pi reef-pi[319]: 2018/07/08 12:33:54 ERROR: lighting-subsystem: Failed to set pwm value. Error: write /sys/class/pwm/pwmchip0/pwm1/duty_cycle: invalid argumen
Jul 08 12:34:24 Reef-Pi reef-pi[319]: 2018/07/08 12:34:24 lighting-subsystem: Setting PWM value: 89 at channel: 0

The pwm setting installed at "100" and I did not change it.

Got it. I am able to reproduce it, let me check right now and get back to you

 

[philshel]

Got it. I am able to reproduce it, let me check right now and get back to you

No hurry on this end. Remember we talked about that "sleep" thing?

 

[Erica-Renee]

pi 3 is running again...

No hurry on this end. Remember we talked about that "sleep" thing?

Sleep if for those who do not have Aquarium Controller to hack...

 

[Ranjib]

Upgraded my doser build today, since it’s two channel ,decided to put the pi pwm in actual use.
Build: pi zero, perma proto board, l293d, one lm2596 (for 12v to 5v conversion), two 12v peristaltic pump, 12v 2amp power adapter

Housing : uxcell enclosure , nylon standoff’s

Circuit closeup : I can control the speed, duration and direction of both peristaltic pumps using a single l293d chip. Pi prvoided two pwm input and 4 gpio for direction control . Green wires are pi pwm in, blue are gpio , yellow are doser pwm our

Pi zero is hidden below the perma proto board

Dosers

Looks so much better than the old wooden enclosure. I’ll put it to use back again, and let you know how it went. Initial testing are all green. There was a bug in pi pwm, @philshel pointed our earlier, fixed that as well

 

[Des Westcott]

I think you are passing the whole URL to the installation command, (dpkg -i), you have to just pass the filename instead, i.e.
try this

sudo dpkg -i [URL='https://github.com/reef-pi/reef-pi/releases/download/2.0.0-beta-5/reef-pi-2.0.0-beta-5-pi3.deb']reef-pi-2.0.0-beta-5-pi3.deb[/URL]

and not this

dpkg -i https://github.com/reef-pi/reef-pi/releases/download/2.0.0-beta-5/reef-pi-2.0.0-beta-5-pi3.deb

The second screenshot is the important one, the text in the screen are very small so I am having a hard time deciphering it, but this is what I suspect

Hey Ranjib

Tried your suggestion as above - this is what I got.... Hopefully the screenshot is better quality.

Des

 

[janos]

Hi when you do dpkg -i there is no url: only the downloaded file name.reef-pi-2.0.0-beta-5-pi3.deb. try to do ls enter than you could see you have downloaded file or not.

 

[Harry Rayner]

I have not used pi A (original one) but the package we build for pi zero works flawlessly with pi b+. I think it will work fine on pi a as well , but I have not personally tested it . Pi 3/2/zero/b+ all should be kosher

I’ve tried installing onto my a however after following the instructions and attempting to install the latest beta for the 0 I keep getting the message: unit reef-pi.service could not be found.
Any help appreciated.