POW energy_delta blank

[xoseperez]

Originally reported by: Chad Faurie (Bitbucket: ChadFaurie, GitHub: Unknown)

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Hi

After a while the POW reports nothing in the energy_delta topic on MQTT

[xoseperez]

The energy_delta topic reports energy consumption over the last minute in Joules. So, previous energy_total value plus current energy_delta should be current energy_total.

[xoseperez]

Original comment by Chad Faurie (Bitbucket: ChadFaurie, GitHub: Unknown):

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I did see that, and it works really well
What I observed however is that the actual topic message returns blank, it does not reflect any value at all where as energy_total works as it should

This occurs after about an hour of up time
I end up with a blank measurement in Home Assistant as below

[xoseperez]

Original comment by jcoertel (Bitbucket: jcoertel, GitHub: jcoertel):

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Hello,
Facing the same problem and here is how it happened : :e

• report of xxx_energy_delta fine until I turn on the equipment connected to Sonofff POW

• first xxx_energy_delta report after turning on is OK

• after that xxx_energy_delta report is (null)

Here is MQTT report (subscribe on .../energy_delta) :

You can see that turning on rad01 sets the right level for the first report but after topic value is (null).

Did the same with another equipment (rad02) with same result. After a while the values are still null.

Not sure if the this is the same issue.

Cheers

[xoseperez]

Original comment by jcoertel (Bitbucket: jcoertel, GitHub: jcoertel):

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Hello again,

Had a look to the code (file power.ino) and I did a test after increasing the buffer size of conversion buffers.

Previous code was:

char buf_energy_delta[10];
char buf_energy_total[10];

Changed code :

char buf_energy_delta[20];
char buf_energy_total[20];

After that I did not experience the problem anymore.

Maybe it can help to fix the issue.

Cheers

[xoseperez]

Original comment by Chad Faurie (Bitbucket: ChadFaurie, GitHub: Unknown):

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Awesome, I'll be honest I have not had the chance to look at it, I have been traveling the last 2 weeks.

I'll test the fixes when I get back unless they get pulled into the latest release

[xoseperez]

Changed in dev branch, will be released with 1.9.8

[xoseperez]

Released with 1.9.8

[xoseperez]

Removing milestone: 1.9.8 (automated comment)