Am 20.09.2015 um 19:21 schrieb Markus Gaugusch:
>
> I have samples of ds2480b and ds2482-800. I don't have a max3232 around to
> convert serial between 3,3V and 5V. Pin7 (GPIO4) is used by DHT22 humidity
> sensor, but possibly I can use another pin for that one.
> I usually solder using breadboard-pcbs and use old floppy cables to
> connect the chips like ds2408.
>
> So, to sum up: If I can build my 1wire bus with any of the above
> components I'd be happy if I get a schematic :)
>
The I²C on the board pins is 3.3V, too, so you need a voltage adaptor
chip for that one, too.
But the I²C on the HDMI port is 5V, you can connect the DS2482-800
there. You need a HDMI cable and a kernel patch for unlocking that I²C bus.
http://blog.koalo.de/2013/11/i2c-over-hdmi.html
If you don't wanna lose the HDMI port, you may want to solder it to the
back side of the connector.
Kind regards
Jan
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