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[on:]

Hi !

How can I connect four srf08 sensors to and arduino mega,
the following link only shows how to connect 1 ,
http://www.robot-electronics.co.uk/files/srf08.pde  (example)
http://www.robot-electronics.co.uk/htm/srf08tech.html (technical data)
and i don't know how to change the addresses of the ultrasonics.
If possible please post code, to help me solve my problem.

Thanks
Regards

Jak24

[Reply #1 on:]

First of all, you must connect the srf's one by one and chance the adress(at least for 3 of them , so that they all have different adresses).
Connecting shouldn't be to difficult, just connect the 5V and GND to arduino power pins. And the SDA and SCL go to pin 20 and 21. Pull up resistors are included in the board.
Then just send these commands to the old adress: 0xA0, 0xAA, 0xA5, <new adress> . So if we want to chance the adress to E2:

Code:

Wire.beginTransmission(0x70);
Wire.send(0xA0);                         
Wire.send(0xAA);   
Wire.send(0xA5);
Wire.send(0xE2);
Wire.endTransmission();