battery vcc measure problem

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skittlez
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Joined: 30 Apr 2019, 03:42

battery vcc measure problem

#1 Post by skittlez » 12 Sep 2019, 15:11

Hi,
I have a lipo battery connected to a ldo 3.3v regulator that is powering my esp8266.
This works fine however I want to monitor the 3.3v and then detect when it just starts to drop out which will indicate that the battery is getting too low.

I am using the vcc bin, I added "analog internal" as a device but it reports a measurement of "-1"

I have nothing connected to a0

What am I doing wrong?

Thanks for any help

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grovkillen
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Re: battery vcc measure problem

#2 Post by grovkillen » 12 Sep 2019, 16:41

Shouldn't you use VIN?
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Sponsor ESP Easy, we need you :idea: :idea: :idea:

TD-er
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Re: battery vcc measure problem

#3 Post by TD-er » 12 Sep 2019, 21:46

The VCC build allows the "system info" plugin to report the VCC.
The analog input (ADC) plugin cannot be used with the VCC build.

This one has bitten me too last week :)
And yes this should be changed :)

skittlez
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Posts: 13
Joined: 30 Apr 2019, 03:42

Re: battery vcc measure problem

#4 Post by skittlez » 13 Sep 2019, 00:57

TD-er wrote:
12 Sep 2019, 21:46
The VCC build allows the "system info" plugin to report the VCC.
The analog input (ADC) plugin cannot be used with the VCC build.

This one has bitten me too last week :)
And yes this should be changed :)
Ah ok, worked it out: generic system info device
Thanks!

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