Parallax OFN

Tappi

Hello everyone,

do you know what is the optical finger navigation module which is used in the Parallax OFN (27903). I wonder if there is the possibility to change I2C address so that I can hook more than one module in the same BUS. Do you have information for this?

BR Tappi

rosco_pc

According to this article: https://www.digikey.com/en/articles/techzone/2011/sep/a-tale-of-two-trackers
the OFN module is based on a Avago ADBS-A320: http://datasheet.octopart.com/ADBS-A320-Avago-datasheet-10313778.pdf

And according to the data sheet it should be possible to change the address (see page 23 in the datasheet). However it looks like you may need to hack the module in order to get this done

jdolecki

Look up i2c multiplxer I don't know if that's the route you want to go but it will solve your problem.

https://learn.adafruit.com/adafruit-tca9548a-1-to-8-i2c-multiplexer-breakout/overview?gclid=EAIaIQobChMIspWRw4LJ1QIVgjRpCh0h2wR9EAAYASAAEgKWNfD_BwE