Will readLine() work with with just 2 QTR sensors?

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1

Hi Everyone,

I’m writing a bunch of code for a friend’s robot, and though I have considerable experience with AVRs, this is my first stab at Arduino.

My friend’s robot has two line following sensors mounted on the front of the bot. If I use the PololuQTRSensors Arduino library, and set it up using just two sensors, am I correct in my understanding that readLine() will return a value from 0 to 1000? The reason I ask is that I only see examples for 3 or more sensors, and I don’t have the hardware to actually test it on.

Thanks in advance!

Brad

2

Hello,

Sure, that function should work with just two sensors. But if it doesn’t, you can implement it yourself pretty easily. The formula is just 1000*B/(A+B), where A and B are the calibrated readings of the two sensors.

-Paul