Cannot read voltage/current on HLW8012

Ulf Holt

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Aug 14, 2021, 12:50:34 PM8/14/21

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Have tried to configure tasmota on Wemos ESP 8266, but Voltage and Current shows zero. I have the following setup:

When I connect a heater, I will see the Energy increasing, so there is some reading, but not what I want.

Can someone give me a hint?

Regards

Ulf

Philip Knowles

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Aug 14, 2021, 3:52:14 PM8/14/21

to Ulf Holt, TasmotaUsers

I’d try

GPIO05 HLWBL SEL

GPIO12 Relay1

GPIO13 HLWBL CF1

GPIO14 HLW8012 CF

And then, rather than using a Template, select the Module as a Sonoff POW (it won’t allow you to set other GPIOs but it will be mimicking a POW).

Worth a try.

Phil K

Sent from Mail for Windows

From: Ulf Holt
Sent: 14 August 2021 17:50
To: TasmotaUsers
Subject: Cannot read voltage/current on HLW8012

Have tried to configure tasmota on Wemos ESP 8266, but Voltage and Current shows zero. I have the following setup:

When I connect a heater, I will see the Energy increasing, so there is some reading, but not what I want.

Can someone give me a hint?

Regards

Ulf

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Ulf Holt

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Aug 16, 2021, 12:42:04 AM8/16/21

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Hello Phil.

I’ll give it a try later, but had to strip down the test circuit due to a short circuit, while I was testing using EspeEasy, which gave me all readings. This means that HW is ok, just have to do some more experimenting in a stable and safe environment.

Ulf Holt

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Aug 16, 2021, 5:10:56 AM8/16/21

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Getting better, but still not OK.
If relay is on, then I get the values, though current is way off, which, of course, is just a question about calibration. When realy is off, then everytying shows up 0 - zero.

I think I have seen this mentioned before, but cannot remember where

Ulf

Philip Knowles

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Aug 16, 2021, 6:27:59 AM8/16/21

to Ulf Holt, TasmotaUsers

It’s in the SetOptions. SetOption21 see Commands - Tasmota - Power Monitoring

Regards

When I connect a heater, I will see the Energy increasing, so there is some reading, but not what I want.

Can someone give me a hint?

Regards

Ulf

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Ulf Holt

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Aug 16, 2021, 6:42:09 AM8/16/21

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Thank you! That solved the problem

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