Unexpected Outputvoltage at the WeMos D1

When I setup Blynk for the WeMos D1 and I use the slide controle for one output pin I get at the full slide (255) only a Voltage of 0,82V at the output. At 124 I get 0,47V. I expect values in between 0 and 3.3V. Where is my mistake?

Thank you in advanced.

Fix the slider from 0 to 1023 and check the results.

thank you for the advice!

This is normal value for wemos d1 I had same issue and I had posted that also