Address of second SEN-11931 temp sensor connected to RasPi?

[emeyeraway]

I have successfully connected a SEN-11931 Temperature Sensor (from SparkFun) to my RasPi and can log temperatures over time. I would like to connect two of these sensors at the same time. My problem is, how do I use a different address for the second sensor? Connecting the address pin (ADD0) to ground provides the address for the first sensor. I found something on the internet that says connecting the ADD0 pin to 3.3V should change the sensor's address, but when I try this, my RasPi crashes; i.e., the little red light goes dark. I was relieved to find that it doesn't seem damaged by the experience.

 

Can someone tell me how to connect a second sensor to a different address in RasPi?

 

Ed Meyer

[SimpleSi]

Sounds like you haven't unsoldered the blob of solder connecting AD0 to gnd - it would certainly explain the brownout if you hadn't!

 

http://www.hobbytronics.co.uk/image/cache/data/sparkfun/sensors/tmp102-r2-500x500.jpg

 

Simon

[emeyeraway]

NOW I get it! I wasn't aware that that solder bridge connected ADD0 to GND. Obviously I shouldn't connect ADD0 to GND and 3.3V simultaneously. I'm going to take a closer look at the sensor, and I may want to get back to you with another question afterwards. Thanks for your help so far.

 

Ed Meyer