Problem getting a reading from an ADS1015

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ekeen3
 
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Problem getting a reading from an ADS1015

Post by ekeen3 »

I am trying to get a reading from an Adafruit ADS1015 breakout. I have followed the tutorial, and hooked up the board as illustrated there to an Arduino Micro. I'll show a picture of the hookup below (I am using 3.3V for the power buses on the breadboard). I am trying to get a reading from an FSR, but so far I only get a consistent result of '4095' result back from any of the ADC pins, using the singleended code example. I have tried different variations of gain (2/3x, 1x, 2x), and different pull-down resistors in the voltage divider (currently 1 KOhm). They have all still left me with the same unchanging reading.

If anyone would be able to help me understand how to continue troubleshooting this problem, I would appreciate it! Can I tell for certain, given the readings I'm getting, that the board is still operational?

Thanks for your assistance!

Note: the ADS1015 is powered by a pair of jumpers hidden under the board, and connected to the rails.
Image of ADS1015 breakout and FSR hookup
Image of ADS1015 breakout and FSR hookup
breadboard I.jpg (179.29 KiB) Viewed 339 times
Alternate view of ADS1015 breakout and FSR hookup
Alternate view of ADS1015 breakout and FSR hookup
breadboard II.jpg (102.83 KiB) Viewed 339 times

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adafruit_support_bill
 
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Re: Problem getting a reading from an ADS1015

Post by adafruit_support_bill »

You need to have VDD and GND connections to power the ADS1015.

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ekeen3
 
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Re: Problem getting a reading from an ADS1015

Post by ekeen3 »

Thanks for the reply! I wrote in the note that the breakout is connected to VCC and GND by a pair of jumpers hidden under the board, and connected to the rails. It has power, but the connections are just hidden in the photo.

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adafruit_support_bill
 
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Re: Problem getting a reading from an ADS1015

Post by adafruit_support_bill »

What happens if you connect the input pins to GND?

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ekeen3
 
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Re: Problem getting a reading from an ADS1015

Post by ekeen3 »

With the input pins connected directly to GND, I get the same consistent result of '4095' back from all of the ADC pins, using the singleended code example.

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adafruit_support_bill
 
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Re: Problem getting a reading from an ADS1015

Post by adafruit_support_bill »

Not sure what would cause that. Let's try replacing the board. Please contact [email protected] with a link to this thread and we'll get one out to you.

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mike6440
 
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Re: Problem getting a reading from an ADS1015

Post by mike6440 »

I am having this problem exactly. Vdd=5. Addr is at ground. A0=0--3 v. Output is 4095. I am using the code provided.

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Re: Problem getting a reading from an ADS1015

Post by adafruit_support_bill »

@mike6440 - please post a photo showing your soldering and connections.

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