ESP8266 Community Forum

As I understand it, Lua 5.1 doesn't support native bitwise operators like & and |. However it can be worked around by including the bit module, but then the syntax becomes something like bit.band(a, b) and bit.bor(a,b). I have confirmed that this works by trying these functions on the command line of my ESP8266.

Lua 5.3 supports native bitwise operators, but I don't see a way to instruct nodemcu-build.com to build 5.3 based firmware. Is it possible?

I would prefer to use the 5.3 native bitwise operator syntax for compatibility with my host machine's Lua. If necessary I can do builds on my own PC, I have the toolchain and a clone of the NodeMCU git repo. But I'm hoping to be lazy and use nodemcu-build.com.

Thanks, and sorry if this is already answered somewhere that I didn't find with a search.

Just to let people know that this resolved. I built an image based on Lua 5.3 using my clone of the Git repo. All working well. Used Lua coroutine feature in this experiment: https://hackaday.io/page/10109-bitbangi ... re-support

I'm really new to Git and ESP. How did you build the firmware for lua53 ?

The online documentation explains how. Alternatively use the Cloudbuilder referenced in the docs.