meteohub.de

Thanks pinto! Up and running now...

Final script for posterity:

#! /bin/sh
#
while :
do
WhatWeRead=$(grep -m 1 V /dev/ttyUSB0)

# Format reading
volt=`echo $WhatWeRead | cut -c -7`
amp=`echo $WhatWeRead | cut -c 10-16`
watt=`echo $WhatWeRead | cut -c 19-25`
wattH=`echo $WhatWeRead | cut -c 28-34 ...

Alright so that works!

One last thing:

Actual Sensors are /100 in your syntax, how would I *100 so the values come out right on the sensors?


Type # ID Name Last Signal Sensor Data
unknown 20 1 sec 0.13
unknown 21 1 sec 0.02
unknown 22 1 sec 0.26
unknown 23 1 sec 5.14
Station 2 (Plug-in ...

Ok, I think it will work now as this is what I did:


#! /bin/sh
#
while :
do
WhatWeRead=$(grep -m 1 V /dev/ttyUSB0)

# Format reading
volt=`echo $WhatWeRead | cut -c -7`
amp=`echo $WhatWeRead | cut -c 10-16`
watt=`echo $WhatWeRead | cut -c 19-25`
wattH=`echo $WhatWeRead | cut -c 28-34`
echo data20 ...

used ipkg install grep to get a different version, now it supports -m


New lines aren't working though

root@sioweather:/home/meteohub$ sh load.sh
data20 13.3\ndata21 2.0\ndata22 26.4\ndata23 514.0

this is what I get from the command line

root@sioweather:/home/meteohub$ sh -x load.sh
+ :
+ grep -m 1 V /dev/ttyUSB0
grep: invalid option -- m
BusyBox v1.2.1 (2007.12.25-11:17+0000) multi-call binary

Usage: grep [-ihHnqvsEABC] PATTERN [FILEs...]

Search for PATTERN in each FILE or standard input ...

trying right now..

Ok I think I cracked it, probably there is a simpler way to write it, but this seems to work:

awk 'BEGIN {FS = "" } ; { print "data20 " $5$6$7$8 "\n" "data21 " $14$15$16$17 }' /dev/ttyUSB1

The result is:

data20 15.5
data21 12.5
data20
data21
data20 15.8
data21 12.5
data20
data21


The blank ...

Since it seems to hang when in a variable (not sure why, other than you cannot cat /dev/ttyUSB0 more than once, The second session will just hang)
I have tried a different approach.

Using:

#! /bin/sh

while :
do

(printf "%s" "data20 "; cat /dev/ttyUSB1| cut -c 4-8)

sync
sleep 30
done


I get ...

Here is what I get:
Seems to hang. BUt I know I can call cat /dev/ttyUSB0 from a shell script as I have done it numerous times. Something to do with loading it into a variable first?

Ok, still no luck, but I rechecked everything possible to make sure there were no syntax errors, or other mistakes.

SO I started working on my version of the script:

#! /bin/sh
#
while :
do

# Read data from sensors
Load=`cat /dev/ttyUSB0`
Charge=`cat /dev/ttyUSB1`

# Format readings
lvolt=`echo ...

ARRGGHH.. for a second I thought I had cracked it. I use nano on the meteohub shell, and forgot to do nano -w so the original attempt to implement the script was wrong. I fixed that, but still no new sensors are being implemented. I do see this in the meteohub log though:

logger (11.06.2012 09:13 ...

Also, FWIW, doing this does work:

root@sioweather:~$ cat /dev/ttyUSB1 | cut -c -7
-00015.

-00015.

Ill have to play with cut to get exactly what I want extracted, but I see where you were going with that. WAY easier than awk to pick specific characters.

And I also think I understand what your ...

I apologize for not understanding. Here is how I tried to implement:

copied your script to a file /home/meteohub/load.sh
chmod u+x /home/meteohub/load.sh

execute it
/home/metohub/load.sh
After about 30 seconds it comes back "Terminated"
Not sure what that means.

So I try to add as new plugin ...

Awesome! Thanks.. ill try to implement tomorrow

Thanks again!

I posted this in another thread a while back, but no responses (wrong forum category maybe?). Im really just looking for a way to read my wattsview http://wattsview.com/ serial DC Amp/Volt meters. I have them attached to the linksys nslu2 via added USB ports and USB serial adapters. I have two of ...