I AM TRYING TO BUILD PROGRAM USING MCUMGR

[Tharak]

Dear Mate,

I am trying to build and flash a program by using (+) Add DFU support to your application - Software - nRF Connect SDK guides - Nordic DevZone (nordicsemi.com) this link . i build the program 2 times succesfully after mcumgr --conntype serial --connstring "/dev/ttyACM0,baud=115200" echo hello this cmnd in my command promt i got NMP Timeout below i attached image also and i avoid that error and i tring to update application by using mcumgr --conntype serial --connstring "/dev/ttyACM0,baud=115200" image upload -e app_update.bin this cmnd i got nothing and it stuck at 0.0 only its not going and am struck here i need your suggestions and i am attaching both error images

[Hung Bui]

Hi Tharak, 

Please be noted that MCUMGR doesn't build a program. You use MCUMGR to do DFU update (Device firmware update) on a board that support SMP_SVR protocol to receive the image from PC. 

Please state clearly step by step on what you have tested, what work, what doesn't work. If it doesn't work , what is the result that you expecting. 
Please use stop . to split the sentence, it's very hard to read without that. Better please use step by step

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3. etc