Can I broadcast to SRF 02?

[freyr]

Can I broadcast to SRF 02 using i2c?

What I'm thinking of is an array of them with one ranging normally and the others 'fake' ranging (syncronized via broadcast).

[chris]

Yes that's possible, check out the documentation page section commands http://www.robot-electronics.co.uk/htm/srf02techI2C.htm

You need to set the primary SRF02 to a real ranging mode and then command the others to do a fake range.

[freyr]

wonderful, it just that the docs never actually mention broadcasting so I was not sure.

Thanks

[Gerry]

When you say "broadcast" are you referring to the I2C general call?
If so, I have to disappoint you. The SRF02 uses the PIC16F687 chip which does not support the general call. All SRF02's on the I2C bus have to be individually controlled.

[freyr]

Thats a bit disappointing.

I guess you can loop through a set of these quite and work out the timing differences with reasonable accuracy so may this is a none issue.

IIRC you should be able to write to 10 of these with in 1 msec on a fast i2c bus of 400KHz+

but does the sensor support such fast communications? Can it use a 1MHz bus?