Cannot burn the firmware into RAK8212

Cellular Boards RAK8212
#1

Hi,
I tried to follow the steps described in this document http://docs.rakwireless.com/en/Cellular/RAK8212/Software-Development/Get_start_with_RAK8212_and_Hologram.io_using_RUI_firmware_V1.0.pdf
and I wired my J-link Edu Mini programmer to the board accordingly and used an external battery as a power source. But nrfgo Studio is not detecting the target as you can see in the attached screenshot.

nrfgo
nrfgo.PNG1026×744 35.6 KB

I’m using the latest versions of all nrf and jlink softwares.
Could you please tell what else can I do?
Thanks.

#2

Hi @Mohamed,

I’m writting a new document about it, but i haven’t finished it.
I can give you some guidence using pictures.

You can use this tool to burn the firmware for RAK8212:
https://downloads.rakwireless.com/en/Cellular/RAK8212/Tool/
After installing, you can open the program “J-Flash V6.41a”, and do according to the following steps:
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Then you can drag the firmware file into this tool as follow:
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and earse the old firmware firstly:
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Now, start to burn the new firmware:
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OK, that’s all, please have a try.

RAK8212 - sending the Quectel_QuecOpen application to the bg96 module
#3

Hi @Fomi,
Thanks for your detailed response but I already tried with JFlash V6.46i (latest version) and I got the same error when connecting with your version too.

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image.png916×703 25.9 KB

#4

There may be 3 reasons:

  1. RAK8212 need to reset, please try;
  2. RAK8212 need a powe supply as follow:
    image
  3. Please check whether you have connected JTAG with RAK8212 correctly.
#5

Okay, I rechecked everything and it was a bad wiring issue. I can flash the firmware the original way with nrfgo studio just fine.
Thanks @Fomi