need help in reading ds1990 ibutton with pic

[rohitlucky]

Sir,

need help in reading ds1990 ibutton with pic16f628 .i know 1 wire routins for ds1820.is it same for both.actually i want to make door lock with i button .please help me.

 

[tpetar]

I made iButton door lock with 89c2051 in DIP works fine, just now making in SMD version.

 

[thunderboympm]

what the problem you facing? It is very simple.

 

[electronicsbasecom]

Hello,

You can find a lot of usefull information about i-Buttons, but unfortunately (or not) only for AVR MCUs at next links:
http://www.electronics-base.com/ind...-readout-example-project-used-with-ds1990r-f5

http://www.electronics-base.com/ind.../128-crc-calculation-for-maxim-ibutton-device

**broken link removed**

Greetings...