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Re:Espresso Machine Powered by Tcl/Tk by kbr2000 on Tuesday August 13, 2019 @12:42PM (#20687499)
Sounds like you might want to explore Forth a bit. Punyforth on the ESP8266 is a convenient way to try get started hands-on, Jonesforth if you want to learn how you could go about implementing one.

On bigger devices (PC/SBC/...) with an OS, Tcl/Tk is a wonderfully effective programming tool!

Re:Espresso Machine Powered by Tcl/Tk by kbr2000 on Thursday August 15, 2019 @04:01PM (#20709059)
...While checking the nRF52811 product specification to learn more about this chip, I found out that it contains a Cortex M4 CPU. You can research some of the existing Forths for these processors (myself I find a tethered Forth convenient to work on CPUs like this).