fix arduino wemos D1 upload error:

 fix arduino wemos D1 upload error:

remove usb from wemos D1 

solder wire D3 to GND

plug usb

upload your Sketch

disconnect D3 from GND

fix apple mac app store error 100

fix mac app store error 100:

(1)logout app store
(2)quit app store

(3)deleting ~Library/Caches and /Library/Caches and 

(4)logout mac
(5)login mac
(6)then restarting the Mac App Store you can also fix the problem