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PZEM

Michael Ingraham 2019-08-23 08:19:21 -04:00
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commit 16fb6406ef
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PZEM004T-Energy-Monitor.md

@ -12,10 +12,15 @@ 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.
## 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 (modification works for version v.1.0 and v.3.0).
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).
PZEM-004T v.1.0
<img src="https://github.com/arendst/arendst.github.io/blob/master/media/pzem/pzem-fix.jpg" height="400" />
PZEM-004T v.3.0
<img src="https://user-images.githubusercontent.com/34340210/63592015-8508ac00-c57e-11e9-9e20-2b41b2662161.jpeg" height="400" />
<img src="https://user-images.githubusercontent.com/34340210/63591794-cf3d5d80-c57d-11e9-9945-eb062bebf71b.jpeg" height="400" />
Connect the serial interface of the Sonoff Basic with the serial interface of the PZEM-004T. See pictures regarding used colors and connections.
- 3V3/5V Red