Dear maker,
We're very sorry. NodeMCU has stopped further development of a new development board. And discontinued making new hardware.
The community will updated the NodeMCU Firmware and Documentation. https://github.com/nodemcu/nodemcu-firmware
Yours sincerely,
NodeMCU Team.
Link to post: https://www.facebook.com/NodeMCU/posts/1127730653976116
I'm not a fan of Lua, but their devkit boards are great!