Great - if you find out why the example isn't working I'd love to be able to get the docs changed.
As a starting point you could attempt to do it by using a rising edge on a second pin to stop the RTC (since we know that rising edge on BTN1 works to start it).
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.
Great - if you find out why the example isn't working I'd love to be able to get the docs changed.
As a starting point you could attempt to do it by using a rising edge on a second pin to stop the RTC (since we know that rising edge on BTN1 works to start it).