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Add a warning about different logic levels (3.3V vs. 5V) (Closes: #88) (#91)

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Sebastian Muszynski 2022-07-23 14:52:05 +02:00 committed by GitHub
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README.md
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@ -21,6 +21,10 @@ All Victron devices providing a ve.direct port.
## Schematics
Attention: [The TX voltage of the VE.Direct interface depends on the product: Some are 5V, others 3.3V!](https://www.victronenergy.com/live/vedirect_protocol:faq#q4is_the_vedirect_interface_33_or_5v)
Please measure the voltage between TX and GND. In case of a logic level of 5V you should add a voltage divider or logic level converter between the ESP and the Victron device.
```
UART-TTL
┌────────────────┐ ┌──────────────────┐