[Version 2 Release] RaspberryPints - Digital Taplist Solution

[Gallen1119]

I checked permissions as well as the path previously but I will for sure check that again...

 

[day_trippr]

UPDATE: [...]
Watch this space...

I always do

If you go into their own forums you'll see this ridiculous issue has lingered for freakin' evah...

Cheers!

 

[bscuderi]

okay so i followed day tripprs advice from above cause I wasnt sure if you were talking to me or the other guy but heres the output of that

pi@raspberrypi:~ $ sudo /etc/init.d/flowmon stop
[ ok ] Stopping flowmon (via systemctl): flowmon.service.
pi@raspberrypi:~ $ sudo /var/www/python/flow_monitor.py
Traceback (most recent call last):
File "/var/www/python/flow_monitor.py", line 13, in <module>
arduino = serial.Serial(port,9600,timeout=2)
File "/usr/local/lib/python2.7/dist-packages/serial/serialutil.py", line 236, in __init__
self.open()
File "/usr/local/lib/python2.7/dist-packages/serial/serialposix.py", line 268, in open
raise SerialException(msg.errno, "could not open port {}: {}".format(self._port, msg))
serial.serialutil.SerialException: [Errno 2] could not open port /dev/ttyS0: [Errno 2] No such file or directory: '/dev/ttyS0'

 

[Gallen1119]

So I re-checked the permissions and the path as stated, and they seemed correct. As I looked at the other code for flow_monitor.py (and I am MOST DEFINATELY not a coder) I found this on lines 45-46

#The following 2 lines passes the PIN and PULSE COUNT t$
path = '/var/www/includes/pours.php'

I don't know if it was the correct thing to do, but I changed it to this

#The following 2 lines passes the PIN and PULSE COUNT t$
path = '/var/www/html/includes/pours.php'

and it seems to be working. Did I screw anything obvious up?



Edit: Something still not right that my poor little mind cannot grasp, but I am working on it.

The success did not persist through a reboot. It does work, if after I reboot I stop flowmon and directly run flow_monitor.py in a terminal window.

 

[kaljade]

So I re-checked the permissions and the path as stated, and they seemed correct. As I looked at the other code for flow_monitor.py (and I am MOST DEFINATELY not a coder) I found this on lines 45-46

#The following 2 lines passes the PIN and PULSE COUNT t$
path = '/var/www/includes/pours.php'

I don't know if it was the correct thing to do, but I changed it to this

#The following 2 lines passes the PIN and PULSE COUNT t$
path = '/var/www/html/includes/pours.php'

and it seems to be working. Did I screw anything obvious up?



Edit: Something still not right that my poor little mind cannot grasp, but I am working on it.

The success did not persist through a reboot. It does work, if after I reboot I stop flowmon and directly run flow_monitor.py in a terminal window.

Did you miss this step:

sudo update-rc.d flowmon defaults

(makes flowmon start after reboot)

 

[day_trippr]

okay so i followed day tripprs advice from above cause I wasnt sure if you were talking to me or the other guy but heres the output of that

pi@raspberrypi:~ $ sudo /etc/init.d/flowmon stop
[ ok ] Stopping flowmon (via systemctl): flowmon.service.
pi@raspberrypi:~ $ sudo /var/www/python/flow_monitor.py
Traceback (most recent call last):
File "/var/www/python/flow_monitor.py", line 13, in
arduino = serial.Serial(port,9600,timeout=2)
File "/usr/local/lib/python2.7/dist-packages/serial/serialutil.py", line 236, in __init__
self.open()
File "/usr/local/lib/python2.7/dist-packages/serial/serialposix.py", line 268, in open
raise SerialException(msg.errno, "could not open port {}: {}".format(self._port, msg))
serial.serialutil.SerialException: [Errno 2] could not open port /dev/ttyS0: [Errno 2] No such file or directory: '/dev/ttyS0'

Right - that's the stream of cruft I referred to

This indicates the Arduino is sending pour messages that the RPi can "hear".
Next is to make sure the path that flow_monitor.py is using to pours.php is valid.
It uses /var/www by default, so if your RPints install is rooted at /var/www/html, the python script needs to be changed.
Beyond that is ensuring RPints is configured to use flow monitoring and has correctly assigned kegs to Arduino pins...

Cheers!

 

[bscuderi]

so those error messages that serial isnt working is not a problem? I installed my raspberry pints in /var/www not it /var/www/html so I dont think that is my problem but nothing updates when i blow through the sensor

 

[day_trippr]

so those error messages that serial isnt working is not a problem? I installed my raspberry pints in /var/www not it /var/www/html so I dont think that is my problem but nothing updates when i blow through the sensor

If you got that message while running flow_monitor.py in a terminal window and blowing through the meter, the pour message had to have gotten through the port.

That said, make sure you've done this:

- Disable Serial Port messaging:

Edit /boot/config.txt
Change enable_uart=0

And be sure to review everything that's been posted in the last couple of days.
I've lost track who is who here

Cheers!

[edit] Did you do your original installation "With Flow Meters" or "Without"?
And what are you using for an Arduino - an AlaMode, or an Uno, or ?

 

[bscuderi]

I just started posting today. A couple of months ago I started over and did an original installation with flow meters although i didn't yet have the meters. I put them on order and they took a bit to get here and then I've been busy but I got around to playing around with it again today. I was hoping after all that setup I did a while ago that the sensors would be plug and play but of course that cant be the case for my adriuno im using an arduberry because at the time I ordered they wanted like 60 bucks for an alamode vs 15 for an arduberry. Seems the sketch had no problem loading onto the arduberry. Should I go in and change this setting in boot config with my particular setup?

 

[Gallen1119]

Did you miss this step:

sudo update-rc.d flowmon defaults

(makes flowmon start after reboot)

I did that previously. Will look at it again tomorrow. Life got in the way this evening.

 

[day_trippr]

It can't hurt

I am curious about the "no TTYS0" message though - I don't recall that being in the blast of text I'd see the last time I tried running flow_monitor.py in a window.

Did you load the sketch using the IDE running on your RPi?
That'd give a solid indication that the Pi and Arduino are communicating at some level.

I don't know anything about an Arduberry yet. Gonna Google that right now...

Cheers!

 

[bscuderi]

I just looked i dont see the enable_uart line anywhere in the config file? I may have forgot to mention Im on a pi3 model B running raspbian jessie with pixel

 

[bscuderi]

Yeah adriuno IDE is on the pi and the arduberry sits on top I was able to succesfully directly program the arduberry with the pi

 

[day_trippr]

Ok, the Arduberry is essentially a stripped down Alamode.
Should work just as well.
And it should show up as dev/ttys0 - do you remember when you used the IDE selecting Serial Port 0?

Yes, try adding that line and rebooting...

Cheers!

 

[bscuderi]

i might be wrong but i think it says that it is located at /dev/ttyAMA0? is there anyway to verfiy this?

 

[day_trippr]

Ok then, the easiest thing is to go into flow_monitor.py and change it to use tty/ama0.

Find these lines:

#The following line is for serial over GPIO
port = '/dev/ttyS0'
#The following line is for serial over USB
#port = '/dev/ttyACM0'

Change ttyS0 to ttyAMA0, start the flowmon service, and see what happens...

Cheers!

 

[bscuderi]

now I get this?
sudo /var/www/python/flow_monitor.py
File "/var/www/python/flow_monitor.py", line 9
port = '/dev/ttyAMA0
^
SyntaxError: EOL while scanning string literal

 

[CadiBrewer]

now I get this?
sudo /var/www/python/flow_monitor.py
File "/var/www/python/flow_monitor.py", line 9
port = '/dev/ttyAMA0
^
SyntaxError: EOL while scanning string literal

You need a trailing '

 

[bscuderi]

oh dohhh lol k i fixed that and now this line jsut sits blank but doensnt go back to command line or output anything?
sudo /var/www/python/flow_monitor.py

 

[day_trippr]

Right - it's running without abending.
Blow through a meter.

 

[bscuderi]

blowing through a meter accomplished nothing is it possibly wiring then? the swissflow meters had one flat grey cable with one black. I assumed the black was ground and the other outside cable was 5v and the middle was data

 

[day_trippr]

Run this command in a terminal window:

ls -l /dev | grep serial

You should see something like this:

lrwxrwxrwx 1 root root           7 Aug  2 20:18 serial0 -> ttyAMA0

Then try this:

ls -l /dev | grep ttyS0

and see if you get this:

lrwxrwxrwx 1 root root           7 Aug  2 20:31 ttyS0 -> ttyAMA0

If you do see this, go back into the Arduino IDE and see which Serial Port device shows up.
Hopefully it's actually ttyS0 but as I don't have an RPi3B that's just a SWAG...

Cheers!

 

[bscuderi]

The first command outputs as expected and the second one outputs nothing.

 

[bscuderi]

actually the first looks the same except it says serial1

pi@raspberrypi:~ $ ls -l /dev | grep serial
lrwxrwxrwx 1 root root 7 Sep 4 05:09 serial1 -> ttyAMA0
pi@raspberrypi:~ $ ls -l /dev | grep ttyS0
pi@raspberrypi:~ $

 

[CadiBrewer]

For the second command, substitute your AMA0 instead of the ttyS0.

 

[bscuderi]

$ ls -l /dev | grep ttyAMA0
lrwxrwxrwx 1 root root 7 Sep 4 22:17 serial1 -> ttyAMA0
crw-rw---- 1 root dialout 204, 64 Sep 4 22:17 ttyAMA0

 

[Gallen1119]

So I reinstalled from the beginning and followed the instructions and additions from the rollup post. I decided to keep the install dir as /var/www and changed the Apache2 config file. I get all the way to Step 9.

I copied flowmon to /etc/init.d and modified the permissions as stated. Then when I tried to start the service with

sudo /etc/init.d/flowmon start

I get this

[....] Starting flowmon (via systemctl): flowmon.serviceFailed to start flowmon.service: Unit flowmon.service failed to load: No such file or directory.

Any ideas this time around? I double checked that the file was copied and the permissions were changed.

 

[day_trippr]

$ ls -l /dev | grep ttyAMA0
lrwxrwxrwx 1 root root 7 Sep 4 22:17 serial1 -> ttyAMA0
crw-rw---- 1 root dialout 204, 64 Sep 4 22:17 ttyAMA0

Is there a ttys1?

ls -l /dev | grep ttyS1

Let's go back to the Arduino IDE running on the RPi.
What serial ports actually appear available when you pick a valid board type?
Also, did you ever install the support for the AlaMode board?

 

[bscuderi]

Nothing appears with ttyS1. I did install the arduberry setup and adriuno ide as per their instructions. The only serial port that appears when under adriuno IDE is the ttyAMA0 one and when I select it and flash raspberrypints.ino I get a successful flash message.

 

[day_trippr]

Ok then, it seems all device references should be to ttyama0.
Looking back you've already modified flow_monitor.py to use that device, but haven't gotten any response when blowing through a connected meter while running flow_monitor.py in a terminal.

So...back to your meter question: I believe you have the meter leads correctly identified.


Do you have the required pull-up resistor in place?

Cheers!

 

[Gallen1119]

So I reinstalled from the beginning and followed the instructions and additions from the rollup post. I decided to keep the install dir as /var/www and changed the Apache2 config file. I get all the way to Step 9.

I copied flowmon to /etc/init.d and modified the permissions as stated. Then when I tried to start the service with

sudo /etc/init.d/flowmon start

I get this

[....] Starting flowmon (via systemctl): flowmon.serviceFailed to start flowmon.service: Unit flowmon.service failed to load: No such file or directory.

Any ideas this time around? I double checked that the file was copied and the permissions were changed.

Trying not to get too excited here, but I think it's all working! Seems the problem was I needed to "Relax and drink a home brew," while I was working on it...and maybe a reboot, or,something. More testing, then installation and calibration to come!

 

[bscuderi]

I did not put the resistor as it seemed references on here were saying that it wasn't required? Perhaps I read wrong but I was thinking the adriuno must have been taking care of that.. I dont have any 2200 ohm resistors on hand but I can order some. The only size pull up resistors I have are some 4.7k ones kicking around from dsb820 temp sensors from making some brewpis. Is there any other references to that serial port that need to be changed? I also didn't change that boot.txt yet since it seemed doing one thing at a time and that we were getting somewhere. I'll change that now too.

 

[day_trippr]

You definitely need the pull-up. It's the series resistor that isn't really necessary when VDD = 5VDC or lower. This could easily be your last bug to fix

wrt to that config.txt change, here are a few lines from my notes:

August 02, 2016

FINALLY!

Edit /boot/config.txt

Change enable_uart=0

FER ****S SAKE!

pi@cpints:~ $ ls -l /dev | grep serial
lrwxrwxrwx 1 root root           7 Aug  2 20:18 serial0 -> ttyAMA0
pi@cpints:~ $

Now the serial port option shows up in the Arduino IDE - as ttyS0(?)
Was able to successfully upload the same sketch used on the rest of the fleet.

pi@cpints:~ $ ls -l /dev | grep serial
lrwxrwxrwx 1 root root           7 Aug  2 20:31 serial0 -> ttyAMA0
pi@cpints:~ $ ls -l /dev | grep ttyS0
lrwxrwxrwx 1 root root           7 Aug  2 20:31 ttyS0 -> ttyAMA0
pi@cpints:~ $

Interesting. Looks like ttyAMA0 is synonymous with ttyS0.

Wired up a flow meter and LED to UNO pins D2 and D13, respectively (LED cathode to GND pin)
	- LED lights at end of pour!

Next: turn on flow monitor

Copy /var/www/python/flowmon to /etc/init.d
Set privs: 

$ sudo chmod a+x /etc/init.d/flowmon

Install to run at startup:

$ sudo update-rc.d flowmon defaults

Rebooted

WORKS! YAY!

So, it hella mattered for my first Jessie installation

Cheers!

[edit] fwiw, the reference to hooking up an LED is to my modified arduino code that turns on IO13 for a few seconds if the sketch detects a pour.
Helpful for bring-up. Available upon request...

 

[bscuderi]

ah dude thanks for attempting that on jessie for me! All my stuff is running jessie so that helps. I have faith that it will work after i get the resistors. I just threw a ten pack in my amazon cart. Ill keep you all posted thanks for the help!

 

[day_trippr]

Check the date - that was a year ago

But it appears from my own system schematics that I misspoke wrt using a pull-up on the flow meter signal wire. I'm not seeing them in my schematics, and one of my test mules sitting right next to me has a meter port without any sign of a pull-up.

So my memory glitched and they aren't needed after all. Sorry about that.

 

[bscuderi]

okay not too late to cancel the order, maybe haha, I will change that boot.txt and try that hopefully that is the last bug!

 

[bscuderi]

okay edited the boot config file and still nothing when I blow through a sensor. when I exit with ctrl+c the folowing is outputted not sure if it helps at all..

^CExiting
Traceback (most recent call last):
File "/var/www/python/flow_monitor.py", line 23, in <module>
msg = arduino.readline()
File "/usr/local/lib/python2.7/dist-packages/serial/serialposix.py", line 472, in read
ready, _, _ = select.select([self.fd, self.pipe_abort_read_r], [], [], timeout.time_left())
KeyboardInterrupt

 

[bscuderi]

I've been tinkering today and I'm thinking my problem is serial related but I cant even dream of where to fix it.. To preface this I tried two different approaches.
1) With my current jessie pixel install and raspberry pints with all the arduberry stuff installed I tried seeing the serial traffic with a program called minicom and it sees nothing happening when I blow through a meter. Weird thing is it doesn't bring up AMA0 when i type sudo minicom AMA0 it brings up port Port /dev/tty8. So when I was doubting the serial communication I was doubting a successful flash of the INO. However the adriuno program flashes over gpio with no problem I tried uploading the blink sketch to the arduberry and it succesfully worked I tested with a loadmeter hooked between pin 13 and ground and it was blinking once a second. So my board is programming successfully but not communicating via serial after that?! Web searches were bringing up problems of bluetooth and serial sharing same port names or something on a pi3 but ultimately confused me?
2) second thing I tried is installing raspberry pints onto the arduberry image file they have of everything supposedly working its called jessie for robots. Problem with that is apt-get upgrade breaks it and without it the dependnecies almost all of them fail to installl. So im feeling stuck... as I cant get pints on their image. I know this should work and is probably just a stupid PI setting of some kind so I hate to give up and buy an alamode or uno just yet.. any other ideas?

 

[bscuderi]

Okay I feel like Im getting closer... I followed the advice here...https://www.abelectronics.co.uk/kb/article/1035/raspberry-pi-3-serial-port-usage

Now when I blow in my sensors Im getting something in flow_monitor.py

a couple of times I got something that looked sensible like some letters and numbers but most times i get something like this with unknown messages and then an eventual crash

sudo /var/www/python/flow_monitor.py
Unknown message: 344

Unknown message:

Unknown message:

Exiting
Traceback (most recent call last):
File "/var/www/python/flow_monitor.py", line 23, in <module>
msg = arduino.readline()
File "/usr/local/lib/python2.7/dist-packages/serial/serialposix.py", line 490, in read
'device reports readiness to read but returned no data '
serial.serialutil.SerialException: device reports readiness to read but returned no data (device disconnected or multiple access on port?)

 

[bscuderi]

well I know I've posted may times in a row here but I am hoping my continual digging will be helpful and trigger someone to know what the problem is..

I was able to get minicom to display my serial output after blowing in the sensor a couple of times

sudo minicom -b 9600 -D /dev/ttyAMA0

Welcome to minicom 2.7

OPTIONS: I18n
Compiled on Jan 12 2014, 05:42:53.
Port /dev/ttyAMA0, 01:37:44

Press CTRL-A Z for help on special keys

;0;10;342
K;010
;0;10;677
K;010

more gental blows came without the K perhaps a kicked code?