3.3V RS485 interfacing

ironsider said:
Hi all. I’m looking into those little (and in my experience, fairly decent) RS485 boards, and notice most of them use a MAX485 chip, which won’t work with teensy as it’s 5V.

I’ve stumbled upon these boards. Although these take a 3.3V power supply, does anyone know if their logic will be at 5V or 3.3V (ie VCC)?

Here is a link:
https://www.ebay.co.uk/itm/27427363...Dv-uu8BTcm&var=&widget_ver=artemis&media=COPY
Click to expand...

You can look in the data sheet.
2022-05-31 12_07_43-Window.png
2022-05-31 11_59_11-Window.png

However, what is that 2nd chip? There is no inofrmation about it.
But the title says: " For Arduino RPi ARM ESP8266"

RPI, ESP8266 are 3v3.

Perhaps ask the seller....
 
Hi, thanks for your reply. My issue is that there's an ambiguity in the information provided by the seller. It says:
"Fully equipped with SP3485 RS-485 transceiver and supporting components
Operates from a single +3.3V supply
Interoperable with +5.0V logic"

This suggests to me that it doesn't operate at whatever Vcc is, and it has a level shifter in it. But I can't say for sure, which is why I asked.
 
The chance is very high that it just works.
(And it wouldn't work with ESP, if it was 5V only)
 
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