https://devzone.nordicsemi.com/f/nordic-q-a/23593/pstorage_update-not-working-when-called-before-start_bootloaderHello iam using softdevice 110 and SDK 10.0.0, i have implimented dfu in my project, i want to update a region in EEPROM by calling pstorage_update() function before calling start_bootloader() in dfu_app_handler.c, i have written code in function dfu_app_on_dfu_evten-USTelligent Community 13Thu, 20 Jul 2017 10:23:19 GMThttps://devzone.nordicsemi.com/thread/92705?ContentTypeID=1Thu, 20 Jul 2017 10:23:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9b45b2ee-6693-48aa-80f7-106111219dc6sunil kumar<p>exactly that was the reason, thank you.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/92704?ContentTypeID=1Wed, 19 Jul 2017 08:40:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0ff1482b-60a7-4dcc-92a2-1eb00276f74cHung Bui<p>Hi Sunil,</p> <p>When you call pstorage_update() the flash won&#39;t be written right away. It will queue the command and then send the update command to softdevice. Then the softdevice will schedule the flash execution. So if you call bootloader_start() right after pstorage_update(), the chip will reset before the flash operation is executed.</p> <p>What you need to do is to wait for the call back of pstorage to make sure the flash is updated properly, before you call bootloader_start().</p><div style="clear:both;"></div>