Post by thread:[EE] newbie: i2c multiple devices

Hello all, I have 8 SRF08 ultrasonic rangefinders that I want to connect on a single i2c bus. The SRF08 seems to have a default address of 0xE0, which can be changed by sending a series of instructions and the new address. However, since they all start with the same address, how do I address them individually to give them all different addresses? The only way I can figure out how to do this is to plug them in one at a time and give them unique addresses. Is there a simpler way of doing this that I'm missing? If this is the way to do it, I would hope the SRF08 holds that address in flash so I don't need to re-setup the bus every time I lose power, is this correct? Thanks much, Ian Smith-Heisters http://www.0x09.com

> The only way I can figure out how to do this is to plug them in one at a > time and give them unique addresses. Is there a simpler way of doing > this that I'm missing? If this is the way to do it, I would hope the You got it. > SRF08 holds that address in flash so I don't need to re-setup the bus > every time I lose power, is this correct? Yes. The addresses are held until changed again. -- D. Jay Newman ! Polititions and civilations come and spam_OUTjayTakeThisOuTsprucegrove.com ! go but the engineers and machinists http://enerd.ws/robots/ ! make progress