P1 signal inverter not working

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el_pinjo
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Joined: Tue Apr 25, 2017 7:59 am

P1 signal inverter not working

Post by el_pinjo »

Hi All,

Yesterday the installed an ISKRA AM550 in our home. I am now trying to read the data from the meter and as expected the data is garbage as it's inverted:

Code: Select all

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I now want to build an inverter to connect the data directly to the GPIO pins of the Raspberry Pi. I have found this [link url=https://wiki.pieper.eu/slimme-meter-uitlezen-1]site[/link] that show a schema how to build the inverter.
So I tried to build something myself first using a breadboard. I have built this to invert the signal.

Image

However when I connect it all I no longer get data. Did I mis interpret the schema?

I hope someone could help me out as I am not seeing what I am doing wrong.

Many thanks.
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