What you may have ended up by using STM / Espruino boot loader based firmware updater on the nrf5x / Raytec based boot loader device is a bricked BLE connectivity.
Btw, for the com port connection to work correctly as by Espruino doc, you still need to have a working Espruino REPL on your device... And even if it (would still) work/s, you still cannot update Espruino BLE Espruino device via Espruino IDE...
To get your device back in working BLE boot loader mode / sw update OTA, you may need to walk the path of Recover from a bricked nrf52 device . Check these links as a 'boot strap links' to all the details you need to consider:
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.
What you may have ended up by using STM / Espruino boot loader based firmware updater on the nrf5x / Raytec based boot loader device is a bricked BLE connectivity.
Btw, for the com port connection to work correctly as by Espruino doc, you still need to have a working Espruino REPL on your device... And even if it (would still) work/s, you still cannot update Espruino BLE Espruino device via Espruino IDE...
To get your device back in working BLE boot loader mode / sw update OTA, you may need to walk the path of Recover from a bricked nrf52 device . Check these links as a 'boot strap links' to all the details you need to consider:
Take also a look at http://www.espruino.com/datasheets/nRF52832_PS_v1.0.pdf - p. 70+. 16 Debug and trace / 16.2 16.2 CTRL-AP - Control Access Port