can I connect to my board by bluetooth and open up espruino(or screen/picocom/minicom) and program it wirelessly?
Yes, that's the idea.
You can move the Espruino console away from Serial1 and use it directly to read and write individual bytes - but keeping the console on there is easier, and if there were some kind of error it'd get reported back to you over Bluetooth as well.
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.
Yes, that's the idea.
You can move the Espruino console away from
Serial1
and use it directly to read and write individual bytes - but keeping the console on there is easier, and if there were some kind of error it'd get reported back to you over Bluetooth as well.