Multiple TSL2591

[JHD]

Hello, I'm currently working on a project using TSL2591's to detect two different lights turning on and off. I want to connect them both to the same Arduino Uno R3 and track their readings both simultaneously and independently. Is this possible with the Uno and how would I go about wiring this setup if it is? Thanks for any help.

[adafruit_support_rick]

The TSL2591 uses a fixed I2C address. You can't have two of them on the same I2C bus.
The Due has two I2C buses. That might work for you. Or, there are software I2C libraries out there. You might be able to use one of those to set up a separate bus. Here's a link to one of them: http://playground.arduino.cc/Main/SoftwareI2CLibrary

[jamithaawawn]

Hello,

My problem is not exactly the same as of this original topic page but I must have been very stupid -- trying for nearly an hour and still couldn't find a way to create a new topic on Adafruit forum. Given up and posted my question here and hope that someone is still reading this topic.

I'm trying to integrate a TSL2591 breakout https://www.adafruit.com/products/1980 into a multiple I2C slaves application. I am not sure where a pair of onboard pull-up resistors is located and how to disable them.

Any suggestion is appreciated.

jami

[adafruit_support_rick]

The pullups are here. You can unsolder them

TSL2591_pullups.png (686.94 KiB) Viewed 471 times

[jamithaawawn]

Thank you so much Rick.

j