>The chips were made popular by NodeMCU which uses Lua, but you can easily run Arduino or write plain C on the same hardware. I'm pretty sure that its the work

>The chips were made popular by NodeMCU which uses Lua, but you can easily run Arduino or write plain C on the same hardware. I'm pretty sure that its the work done to make these into $3 wifi arduinos that is what made them popular. That's why wemos literally sells one that is shaped like, and has the same header spacing as, an arduino uno.