The barometer app doesn't show any value on my Bangle.js 2 (2v12) either.
When I choose pressure for one circle on Circles clock it showes a value and from the description I understand it uses the internal sensor. The value is within the normal range so it should be calibrated.
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.
Do you get the notifications on the watch after the update to 0.66? On my watch it's still not working ....