MEAM.Design - ESP8266 - Obtaining an NodeMCU
Individuals
These are sold from many places on the web including hiletgo through Amazon for about $9. Note: the quality assurance from many places is not great. We have had a failure rate (out of the box) of about 4%.
MEAM students
If you are a MEAM student with a potential project we may have extras. Please send an email to medesign@seas.upenn.edu.