You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

dfrobot-ec-ph-adc
0.1.1

This version was deleted from PyPI around 2024-03-29. Installing fails with:
$ pip3 install dfrobot-ec-ph-adc==0.1.1 ERROR: Could not find a version that satisfies the requirement dfrobot-ec-ph-adc==0.1.1
View other deleted versions of dfrobot-ec-ph-adc

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2024-03-28/ \ dfrobot-ec-ph-adc==0.1.1
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Or, download files manually

And install manually via pip:
DFRobot_EC_PH_ADC-0.1.1-py3-none-any.whl (14.7KB)
DFRobot_EC_PH_ADC-0.1.1.tar.gz (14.6KB)