[SOLVED] Wemos D1 not working with basic example

You have to use Blynk Widget Digital D9 to control the onboard LED. Must be a mapping problem in the Blynk or Wemos drivers. Here’s what I’ve discerned by trial-and-error on my Wemos D1 mini:

Wemos pin    Blynk Widget Button   ESP8266 pin
----------   -------------------   ------------
    D0                 D2               16
    D1                 D3                5
    D2                 D4                4
    D3                 D8                0
    D4                 D9                2 (Built-in LED)
    D5                 D5               14
    D6                 D6               12
    D7                 D7               13
    D8                 D10              15