Ah okay, thanks.

Trying to think through/learn compiling for different hw targets, or if it is possible to compile to wasm for multiple device architectures with wasm for embedded devices. 

Was also reading about the bootloader: 

"Networking capabilities for fetching new firmware can be provided by the user application, using the bootloader as a library for updating the firmware, or by using the bootloader as a library and adding this capability yourself."

This is interesting to me, makes me wonder if there are projects that netboot firmware with extended capability. I want to try this eventually. Does anyone know of projects doing this?