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Problem with Electricity Consumption Meter Sketch (TinyTX)

Submitted by pfeilc on Thu, 26/02/2015 - 13:11

Hi,

I am using this sketch to read LED infrared pulses on my electricity meter.
The sketchs is uploaded to a TinyTX (Attiny84A-PU) and sends current Watt consumption to my raspberry pi using RFM12Pi from the OpenEnergyMonitor Shop.

https://github.com/nathanchantrell/TinyTX/blob/master/TinyTX_LDR_Meter/T...

Everything works fine, but...

If I use a higher send interval (please see line 33) above 30 seconds, it stops sending!
Maybe a problem with the sketch? Can anyone help?

Best regards,

Christian

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Robert Wall's picture

Re: Problem with Electricity Consumption Meter Sketch (TinyTX)

Submitted by Robert Wall on Thu, 26/02/2015 - 14:27.

I see your problem. There is an error in the sketch (or an assumption that you will not want a delay greater the 32.767 s).

sendInterval is a signed integer, therefore 1000 * sendInterval overflows at 32767.
If you declare sendInterval as an unsigned long, or change "1000" to "1000L" the problem should go away (until you ask for a delay of a few weeks!).

You should inform Nathan Chantrell of the error.

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pfeilc's picture

Re: Problem with Electricity Consumption Meter Sketch (TinyTX)

Submitted by pfeilc on Thu, 26/02/2015 - 14:37.

Hi Robert,

great - thank you very much!!! :-)

I will change my code and also inform Nathan Chantrell of the error.

Best regards,

Christian

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