Open moeburn opened 2 months ago
What ADS1115 hardware is being used for testing?
Is the only difference between the setups the Arduino library being used?
I've tried this on all the various ADS1115 modules I have, on an ESP32C3. Correct, the only difference is changing libraries, and suddenly the current properly drops to 0 after a single ended reading.
I am testing this with a multimeter. Comparing this sketch:
https://github.com/adafruit/Adafruit_ADS1X15/blob/master/examples/singleended/singleended.ino
...with this nearly identical sketch from a different ADS1115 library:
https://github.com/wollewald/ADS1115_WE/blob/master/examples/Single_Shot/Single_Shot.ino
The Adafruit library results in the multimeter showing ~320uA constantly. The other _WE library shows the multimeter reading 0.2uA most of the time, and then briefly jumping up a bit during each read before going back down to near-zero. This is how the ADS1115 is supposed to behave in single-ended mode.
I cannot confirm if this behaviour is the same on genuine Adafruit brand modules. I can only say that this library is no good if you are using 3rd-party ADS1115 modules, if you are expecting full power savings in single-ended mode.