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Changing I2C address of LCD backpack
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Please be positive and constructive with your questions and comments.

Changing I2C address of LCD backpack

by JoyMonkey on Tue Dec 04, 2012 1:25 pm

Quick question: I need to get my LCD running on I2C bus 2, so have to jump the A0,A1,A2 solder pads accordingly. But I have no idea how to set them to 2.
I know that it's 0 by default, soldering A0 and A1 would set it to 3, but how do I set it to 2 ?
Thanks!
JoyMonkey
 
Posts: 19
Joined: Fri Apr 29, 2011 11:35 am

Re: Changing I2C address of LCD backpack

by indy on Tue Dec 04, 2012 8:03 pm

It's binary so to get 2 you would need to solder A1:
Code: Select all | TOGGLE FULL SIZE
A0  A1  A2  address
-   -   -     0
x   -   -     1
-   x   -     2
x   x   -     3
-   -   x     4
x   -   x     5
-   x   x     6
x   x   x     7

indy
 
Posts: 13
Joined: Tue Dec 04, 2012 1:30 am

Re: Changing I2C address of LCD backpack

by JoyMonkey on Tue Dec 04, 2012 8:20 pm

Indy wrote:It's binary so to get 2 you would need to solder A1:
Code: Select all | TOGGLE FULL SIZE
A0  A1  A2  address
-   -   -     0
x   -   -     1
-   x   -     2
x   x   -     3
-   -   x     4
x   -   x     5
-   x   x     6
x   x   x     7


Perfect! Thank you!
JoyMonkey
 
Posts: 19
Joined: Fri Apr 29, 2011 11:35 am

Please be positive and constructive with your questions and comments.