Something is totally wrong with my Boron 2g/3g. I suppose something wrong with my bootloader. I tried to upload a bootloader different ways (using JTAG), for instance using openocd and nrfjprog.sh script. The only way the Boron boots up (in DFU mode) is if I use nrfjprog.sh for softdevice uploading…

Have you tried particle flash serial boron-bootloader@1.4.4.bin and also what about softdevice?

I can’t change the mode to listening, so I didn’t try to flash through serial. And I flashed boron-softdevice@1.4.4.bin before bootloader

Sorry to say but this issue sounds somewhat self-inflicted? Have you tried Particle Doctor? I guess that needs listening (flashing dark blue) mode? Lastly, perhaps logging a support ticket is the next step.

@vitaly_pochtar , you may want to take a look at these posts: [image] How to unbrick Xenon (return to factory default firmware) Troubleshooting @janek after some research and trying it myself, you can un-brick a Xenon, Argon and Boron using a NRF52 DK (or similar) A full …

Most likely the bootloader address needs to be reset. Using the nrf52-particle.cfg configuration file use this OpenOCD command: bld_addr 0xf4000 The symptoms you are seeing would match having a bootloader address of 0. That would allow boot to start when you flash the bootloader to 0, but the devi…

Thanks for the advice! Eventually, after hundreds of tries, I have found the right sequence. The main issue (I suppose) was in a softdevice file. Instead of using boron-softdevice@1.4.4.bin I uploaded s140_nrf52_6.1.1_softdevice.hex and then, uploading all other files (bootloader, system, tinker) …

Hi @vitaly_pochtar … i’m having the same issue. In my particular case, i have a bricked argon. Thanks to your advice, with flashing the bootloader with no 0xf400 address, at least i can put it in DFU mode. but, from there, i try to upload s140_nrf_6.0.0_softdevice,hez file with openocd, and it bric…

@fbt - the Argon may be a bit different here. For the record, it’s always worth using the conventional upgrade path of: (particle flash --usb tinker and then) particle update and then particle flash --usb tinker before digging deeper and flashing to specific memory locations. It might be wor…

Boron is completely dead

Firmware Device OS

peekay123 January 6, 2020, 5:49pm 5

@vitaly_pochtar, you may want to take a look at these posts:

Topic		Replies	Views
Bricked boron after using nrf sdk Troubleshooting	4	1008	September 11, 2019
Xenon bricked after Firmware update to v0.8.0-rc.26 Troubleshooting	7	2959	December 22, 2019
Boron - Bricked? Firmware boron	3	836	April 4, 2020
Boron FW restore Troubleshooting	26	9278	March 3, 2020
Boron LTE Firmware Firmware	8	3109	October 25, 2019

Boron is completely dead

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