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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@rel
Yes the L0s should be fine with supply voltages from 3.6 V even down to 1.65 V. But the LoRa modem requires at least 2.1 V (according to the specs), and who knows what kind of add-on hardware people will plug in, so it's good to have a stable 3.3 V rail I think...
To estimate memory usage, I could do a project with a normal Espruino board, and see how much flash and RAM a simple sensor LoRa node needs, and then decide whether the STM32L072xZ or similar would fit. I looked into the code a bit, and it's a really impressive system! Way beyond my current understanding, of JavaScript, interpreters and all that. So I guess, it's best to estimate by making examples first...