YJ-17095 espruino install

the following is the console output

$ telnet localhost 4444
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Open On-Chip Debugger
> nrf5 mass_erase 
nRF52832-CIAA(build code: E0) 512kB Flash, 64kB RAM
Target not halted

> halt
[nrf52.cpu] halted due to debug-request, current mode: Handler HardFault
xPSR: 0x01000003 pc: 0xfffffffe msp: 0xffffffd8
> cd nrf
> program espruino_bt_nbl.hex verify
[nrf52.cpu] halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0xfffffffe msp: 0xfffffffc
** Programming Started **
Adding extra erase range, 0x00062d60 .. 0x00062fff
** Programming Finished **
** Verify Started **
** Verified OK **
> reset run
>