beginner with emonTx

Submitted by yoch on Fri, 21/03/2014 - 09:03

Hi all,

I started to familiarize myself with emonTx these last days. We want to use it to monitor the electricity consumption independently of emoncms, so I try to understand how it works.

After successfully receiving the data on my Raspbian (thanks Glyn ^^) I need to understand some points :

I try to retrieve the data directly to /dev/ttyAMA0 with python-serial (like it's done in oem_gateway), but I often get SerialException ('device reports readiness to read object returned no data ...' ).
with minicom, I get inputs like this : '10 0 0 42 0 0 0 0 0 0 0 0 0', but I don't know how to interpret them ? (there are only four sensors, and I don't understand why I get 6 values...)
sometimes, after I'm powered up emonTx, my raspberry lose the network connection, what could be the problem ?

Any help or suggestions would be greatly appreciated.

Thank you

yoch

Re: beginner with emonTx

Submitted by jonrescca on Fri, 21/03/2014 - 10:16.

Hi Yoch,

The 6 inputs are:

Power 1 - from CT1
Power 2 - from CT2
Power 3 - from CT3
Power 4 - from CT4
Vrms (x10x) - mains AC voltage - only if AC adapter is connected (x 0.01 in emoncms)
Temperature (x10) - zero if no DS18B20 sensor is detected at power up (x 0.1 in emoncms)

Re: beginner with emonTx

Submitted by yoch on Fri, 21/03/2014 - 12:19.

OK, thanks you.

Any ideas for my other questions ?

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