Programming Nordic Thingy:91

Question

Hello, 
 I have some trouble programming nRF Thingy:91 and therefore would like to ask some questions about possibilities to flash the devices: 
 1) It is not possible to program nRF9160 on Thingy:91 from nRF52840-DK, because it's from older generation (ARMv7, https://devzone.nordicsemi.com/f/nordic-q-a/51799/programming-thingy-91 ) 
 but is it possible to program nRF52840 on Thingy:91 from nRF52840-DK? 
 2) Considering aforementioned reasons, it should be possible to program nRF9160 on Thingy:91 from nRF5340-PDK . Is that true?

Unfortunately anything I try to do ends with nRF Connect (nrjfprog shows similar) showing such error message: 
 Could not fetch memory size of target devkit: Error: Error occured when get library info. Errorcode: CouldNotOpenDevice (0x4) Lowlevel error: JLINKARM_DLL_ERROR (ffffff9a) 
 
 I can program nRF9160 via USB using MCUboot, but that's not the same. 
 
 Any clue what I might be doing wrong?

jrew · Accepted Answer

Dear Martin, 
 I have discovered the reason for my issues. Unfortunately both IDC 10-pin cables I have bought are faulty . I've managed to find another one that works and I can verify that: 
 
 It is possible to program nRF52840 on Thingy:91 from nRF52840-DK and nRF5340-PDK. 
 It is possible to program nRF9160 on Thingy:91 from nRF5340-PDK. 
 
 Thanks for your help, 
 Best regards!

Programming Nordic Thingy:91

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