Can't get into DFU mode after re-programming

SteveD0

I was able to successfully connect the programmer. When I read the memory it looked different than the example in the documentation as it had an extra green area of memory with stuff (I can provide the memory location if needed). Went ahead and loaded firmware but then realized it was the wrong one (1..2.2) so went back and erased the memory and reloaded 1.1.0 which shows:
%XSYSTEMMODE?
%XSYSTEMMODE: 1,0,1,0
Then I went back to test with various examples I previously had tested and they all had the same issue which is I can’t get into DFU mode. Is there something else I should be doing?

One last item. In the last couple times I’ve tried to re-program using the Programmer App after completing gave me complete white screen from where I couldn’t do anything. Have you seen that?

jaredwolff

SteveD0 Went ahead and loaded firmware but then realized it was the wrong one (1..2.2) so went back and erased the memory and reloaded 1.1.0 which shows:

When using the programmer in nRF Connect Desktop and you issue an erase, its the same as nrfjprog -e which erases the full chip and bootloader. You’ll need to re-program the bootloader if you want that functionality to work. Here’s a link to the latest hex. you’ll have to program it using nrfjprog. (The zip comes with a .bin file, you can ignore it.)

nrfjprog --program nrf9160_feather_bootloader_v1.hex --chiperase

You do not have to erase the chip when changing modem firmware. Simply “update” the modem firmware as per the documentation instructions.

SteveD0

Yeah! Thank you. The first device (504) just connected and after stepping outside was able to send GPS locations to the nRF cloud. One quick question: the MODEM and UICC status buttons are now red, however, before I saw them green. Can you explain?

jaredwolff

SteveD0 One quick question: the MODEM and UICC status buttons are now red, however, before I saw them green. Can you explain?

SteveD0 nRF LTE Monitor is listening for responses and status updates from the command line. So if those commands never happen, those status icons never change (even if the device is connected and working a-ok)

SteveD0 Thanks again for all the help! I’m now onto the next challenges.

You got it. 😄 Glad you’re up and running.

SteveD0

Thanks again for all the help! I’m now onto the next challenges.