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adafruit / Adafruit_ADS1X15

Driver for TI's ADS1015: 12-bit Differential or Single-Ended ADC with PGA and Comparator
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Version 2.0 crashes at `begin()` #63

Closed David-OConnor closed 3 years ago

David-OConnor commented 3 years ago

Hi. I've been using this library for a while with no issues, but version 2.x crashes at begin(). If I revert to 1.x, (And make the appropriate module name and address location changes), it works again. How would you troubleshoot this?

Related: It's worth updating this Adafruit guide with the new module name ADX1x15, and the address going in begin() instead of the constructor. And adding how to set a custom address to the examples folder here.

Thank you.

caternuson commented 3 years ago

What main board are you using?

David-OConnor commented 3 years ago

Arduino Uno

caternuson commented 3 years ago

Just tested here and it works OK. The 2.x updates did have some breaking changes, so you may need to make some minor changes to any existing code. To sanity check, try using one of the examples from this library.

This was using the single ended example: https://github.com/adafruit/Adafruit_ADS1X15/blob/master/examples/singleended/singleended.ino with A0 and A2 tied to the voltage divider. A1 tied to GND. A3 tied to 5V.

uno_ads_test

Screenshot from 2021-03-31 14-05-36

David-OConnor commented 3 years ago

Thank you very much for the detailed info. The example code works for me. I'm using this library as a dependency in the Arduino driver for a pH circuit, and am still unable to get v2.x working, but can't figure out why. My best guess is that this is related to the busio dependency change. I'm not getting an error - just a hang, and/or gibberish printed to the console. I'll troubleshoot more, and keep you posted.

I'm not sure if there's a way to pin Arduino dependency versions etc, so am trying try figure out how to proceed.

This may be related to the other issue that was just opened. Or an error on my part; not proficient in c/++.

ladyada commented 3 years ago

you're probably running out of RAM. you'll need to update to a board with more RAM memory.

caternuson commented 3 years ago

Closing due to lack of response. Since the library example sketch works, this may either be the RAM issue or needing some slight code updates to deal with minor (breaking) changes in 2.x release.