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add note.txt

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Michal 2024-05-14 11:17:52 +02:00
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- POE
-wiznet w5500
- pzem-017
-pzem-004t
esp | rs485 | pzem-017
----------------------------------------------------------------------------------------------------------------------------
5v | vcc | 5v
gnd | gnd | gnd
gpio17 | txd |
gpio16 | rxd |
| a+ | a
| b- | b