Wire/I2C Broadcast - what's the setup!?

Forum 2005-2010 (read only) Hardware Interfacing
1

Hey! I want to send data bytes via I2C / wire from one Master to multiples Slaves.

Instead of sending same data to each single slave, I want to send a broadcast to all at once. I found some sources which said this can be done by sending to address 0, but somehow this doesn't work out! So question is, is this broadcasting possible/supported by Arduino and what's the setup for this? Any example code would by very helpful, thanks!

Cheers Tobi

2

Hi Tobi,

there no such thing as a broadcast i2c address. Some slave devices have a mode where they respond to multiple adresses or multiple devices respond to the same address (e.g. TLC59116), but its always a property of the slave and not the master.

MikeT

3

Hey Mike!
Ah good to know, looks like I misunderstood other sources then, thanks!!