reading incorrect data from fstorage after using J-Link script to upgrade firmware

[snowuyl]

Before using J-Link script to upgrade firmware,  offsetStart (0x0) and offsetEnd (0x32E06) are correct. But after using J-Link script to upgrade firmware, offsetStart (0xADDEFE01) and offsetEnd (0x1EF1FFFF) are not correct.

log messages of before using J-Link script to upgrade firmware.

 0> <debug> app: endAddr=0x7FFFF
 0> <debug> app: startAddr=0x7F000
 0> <debug> app: nrf_fstorage_read() e
 0>
 0> <debug> app: nrf_fstorage_read() x
 0>
 0> <debug> app: record
 0>
 0> <debug> app: offsetStart=0x0
 0>
 0> <debug> app: offsetEnd=0x32E06

log messages of after using J-Link script to upgrade firmware.

0> <debug> app: endAddr=0x7FFFF
 0> <debug> app: startAddr=0x7F000
 0> <debug> app: nrf_fstorage_read() e
 0>
 0> <debug> app: nrf_fstorage_read() x
 0>
 0> <debug> app: record
 0>
 0> <debug> app: offsetStart=0xADDEFE01
 0>
 0> <debug> app: offsetEnd=0x1EF1FFFF

[Susheel Nuguru]

Which memory address are you trying to read? where does the offsetSTart and offsetEND reside in the flash? How should I test this before and after? I only see softdevice and app hex file, so which version do i compare the results with? 

Also which logs are you using? I do not see anything on RTT or serial (CDC) after flashing the softdevice and application hex file you gave.

[snowuyl]

I read memory address from 0x7F000. I am using rtt. I will provide Python3 program fo you to reproduce this issue.

[Susheel Nuguru]

[snowuyl]

pip3 install bleak

[Susheel Nuguru]

I have pip3

[snowuyl]

Can you install bleak Python package with the following command?

pip3 install bleak

[Susheel Nuguru]

bleak is installed