Ray Wang from RaysHobby has written an article on his ESPToy 1.2, a ESP8266 development board based on the Lua firmware:
A little while back I released the very first version of ESPToy — a ESP8266 Development Board with a few useful on-board components like color LED, button, and temperature sensor. It has a built-in ATmega644 microcontroller, and pin headers for plugging in a ESP-01 through-hole WiFI module. Shortly after that, I discovered the Lua firmware (named nodemcu) for ESP8266. At first I didn’t pay much attention — Lua is a new language that I’ve never used before, and I wasn’t sure if it’s worth my time learning about it. At the same time I was getting tired of the AT firmware (the original firmware that comes with ESP), partly because it’s not very stable, and partly because it’s complicated to use and involves an extra microcontroller to communicate with it.
Over time I saw increasing development and community support on the Lua firmware. So I became more curious. The final push came recently: there was a supply chain problem of the ATmega644 microcontroller. I was about to purchase a new batch of ESPToy 1.1, but the microcontroller is difficult to source from my suppliers in China. I decided that I should give the Lua firmware a try — if it works, I don’t have to use an extra microcontroller any more!
Details can be found in Ray’s blog post.
Check out the video after the break.