I have bought few WEMOS D1 through Aliexpress.
Checking them I have found that the names (using D1Pins) are not matching the actual pins. What I have is this:
This explains why I had problems and thought that I have burned some pins...
This is the one I have, looks like the original with the following differs:
1. no legend "powered by wemos.cc"
2. Pin D7 has also legend D1 which is wrong, should be D11