UART DFU FAIL

RE: UART DFU FAIL

hah2502 — Tue, 09 Apr 2019 02:50:24 GMT

Additionally, I tested UART example(examples\peripheral\uart). It work successfully.

So I think my serial port communication is no problem.

RE: UART DFU FAIL

hah2502 — Tue, 09 Apr 2019 02:02:13 GMT

Hi Amanda:

After I hold button 4 and reset，LED 3 is on. so I think it enter DFU mode.

There is no error code return after typing this program command.

I connect pin8 RX, pin6 TX and GND to computer serial port line.

Besides, I try to DFU by nRFgo stdio like below picture, it returned some errors.

RE: UART DFU FAIL

Amanda Hsieh — Mon, 08 Apr 2019 12:06:48 GMT

Hi,

Is the LED3 on? DFU mode is indicated by LED 3 being lit. If a valid application is installed on the device, hold Button 4 during startup to prevent the bootloader from starting the application and force it to enter DFU mode instead.

Do you get any error code returned after typing "nrfutil dfu serial -pkg Sena_app_uart_s140.zip -p COM5 -b 115200 "?

[quote user=""]Do I need to program mbr.hex?? if so ,how can I get ths file and program.[/quote]

No, the SoftDevice hex already contains the MBR

-Amanda

RE: UART DFU FAIL

hah2502 — Mon, 08 Apr 2019 01:22:02 GMT

of course,I referred to this document.....still fail

RE: UART DFU FAIL

Amanda Hsieh — Thu, 04 Apr 2019 11:17:44 GMT

Hi,

Could you kindly follow the setting in Secure DFU Bootloader over Serial Link (UART/USB)?

Please let me know it can help or not. Thanks.

Best regards,

Amanda