Remotely Monitoring Overheating DC

@nbkhwjm wrote:

Since ive built a new enclosure for the DC that sits outside, i've needed to monitor the temp of the board while its in the hot Alabama sun. Since there is no "native" way to do this remotely from skylark, I hacked together this solution...

NOTE: using this method is not "secure" its a hack, using NC to open ports can be "hazardous"... so don't be surprised if the neighbor kid uses the DC as a porn server....

1) Login to the DC via ssh with the "outernet" user

2) create a simple bash script that grabs the values your interested in and place it somewhere writable like /mnt/feed_temp.sh: (make sure its executable)

#!/bin/sh

more /sys/devices/virtual/thermal/thermal_zone0/temp

3) start a simple NC listener on the DC

sudo nc -ll -p 4444 -e /mnt/feed_temp.sh &

NC Usage:

Usage: nc [-iN] [-wN] [-l] [-p PORT] [-f FILE|IPADDR PORT] [-e PROG]

Open a pipe to IP:PORT or FILE

	-l	Listen mode, for inbound connects
		(use -ll with -e for persistent server)
	-p PORT	Local port
	-w SEC	Connect timeout
	-i SEC	Delay interval for lines sent
	-f FILE	Use file (ala /dev/ttyS0) instead of network
	-e PROG	Run PROG after connect

4) On another system on the same network, create a simple script to poll the DC

#!/bin/bash
while true
do
        temp=`nc 10.0.1.184 4444`
        echo $((($temp/1000)*9/5+32))F 
        sleep 10
done

In the case above my DC ip is 10.0.1.184, and im using port 4444. Its also converting the C value to F for yankee usage... sleeps 10 seconds and hits it again. you can even log to a file with timestamps, or add other values to send out..

running on OSX...

MacBook-Pro:~ me$ ./get_temp.sh
98F
96F
96F
98F
98F

Chris

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