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Updated PZEM004T Energy Monitor (markdown)

Jason2866 2019-08-23 09:45:11 +02:00
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PZEM004T-Energy-Monitor.md

@ -12,7 +12,7 @@ The PZEM-004T together with a Sonoff Basic provide a good clamp on energy monito
Install Tasmota on the Sonoff Basic and confirm it is functional before connecting the PZEM-004T to its serial interface. Install Tasmota on the Sonoff Basic and confirm it is functional before connecting the PZEM-004T to its serial interface.
## Hardware connections ## Hardware connections
As the PZEM-004T expects 5V serial data and the Sonoff Basic only provides up to 3V3 the expected optocoupler input power of the PZEM-004T has to be reduced. This can be accomplished by soldering a 1k resistor between the joints shown below. As the PZEM-004T expects 5V serial data and the Sonoff Basic only provides up to 3V3 the expected optocoupler input power of the PZEM-004T has to be reduced. This can be accomplished by soldering a 1k resistor between the joints shown below (modification works for version v.1.0 and v.3.0).
<img src="https://github.com/arendst/arendst.github.io/blob/master/media/pzem/pzem-fix.jpg" height="400" /> <img src="https://github.com/arendst/arendst.github.io/blob/master/media/pzem/pzem-fix.jpg" height="400" />