Help with script

[baobab]

Hello,

I need some help solving a head scratcher. I am trying to run a custom script as an event in Meteobridge - Raspberry Pi edition. When I run it from the OpenWRT command line it works as intended - i.e the value of "$a" is published via mqtt (and when echo is uncommented the wind0 values print as expected). When I run it as an event from inside the Meteobridge application, the value published via mqtt is blank. It would appear that no data was received from "nc 127.0.0.1 5556" to be parsed and then assigned to $a. Here is the script:

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#!/bin/sh

while read -r a b c d e; do
     #echo "a=$a, b=$b, c=$c, d=$d, e=$e"
     mosquitto_pub -h 192.168.1.120 -t "test/test" -m "$a"
done <<EOF     
$(nc 127.0.0.1 5556 2>&1 | awk -F '[[:blank:]]+wind0[[:blank:]]+' 'NF>1{print $2}')
EOF

Here is another, easier to understand version of the same script.

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#!/bin/sh
#
### MQTT Test Script
#
nc 127.0.0.1 5556 2>&1 | awk -F '[[:blank:]]+wind0[[:blank:]]+' 'NF>1{print $2}' |
while read -r a b c d e; do
     #echo "a=$a, b=$b, c=$c, d=$d, e=$e"
     mosquitto_pub -h 192.168.1.120 -t "test/test" -m "$a"
done

As the one shown above it, it works as intended if executed from the command line as

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root@MeteoBridge:/tmp/mnt/data/scripts# ash mqtt_test.sh

but fails to work if run as an event. Some additional troubleshooting indicates that

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nc 127.0.0.1 5556 2>&1 | awk -F '[[:blank:]]+wind0[[:blank:]]+' 'NF>1{print $2}' 

fails to produce the same results when run as an event as when being run from the command line.

Thanks for any pointers.

Baobab

[admin]

May be environment settings (PATH, etc) might be different when called from within the Meteobridge logger process?
Punching out the environment settings on the scripts start and comparing this might give you a hint.