Hello, Did all the step by step until the command: node main.js I can see the public key open a new terminal Now connect the USB Core in raspberry and put the core in DFU mode flashing yellow color cd core_keys spark keys save INPUT_CORE_ID_HERE but I receive this error message: Apparently …

Sounds like you might be on Ubuntu? Your DFU-util version is too long. Can you try on some other machine instead to save the keys? :wink:

I don’t have other machine, have another way to solve this problem?

You can try to upgrade DFU-util then? Or might be related to this: [image] Dfu-util doesn't connect to core on Ubuntu [Solved] Troubleshooting I am having a lot of problems creating my dfu-util toolchain on a linux machine. I…

I change the dfu-util version to 0.8 and don’t work yet.

1.) What OS are you on? 2.) How did you install the DFU-util driver? 3.) Is the core in DFU-mode (blinking yellow)?

raspberry raspian STEPS TO INSTALL DFU wget http://dfu-util.sourceforge.net/releases/dfu-util-0.8.tar.gz tar -zxvf dfu-util-0.8.tar.gz dfu-util-0.8 cd dfu-util-0.8/ ./autogen.sh ./configure make sudo make install My core is blinking yellow Libusb 1.0 installed

What does dfu-util -V say? Try sudo dfu-util -l

I found part of solution , now dfu-util -l show [image] but if I insert: spark keys save MYcodeid receive message dfu-util cant find core

try sudo spark keys save core_id You need to replace core_id with id if you know what it is… or you can use some temporary name but not recommended since the file needs to be named with the core_id to work with the local :cloud:

Local cloud don't find cores

Cloud

kennethlimcp March 26, 2015, 3:17pm 4

You can try to upgrade DFU-util then?

Or might be related to this:

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Filesystem Permission denied when saving keys	23	14761	March 17, 2015
Undocumented flash sequence after connecting to network: rapid red, rapid cyan, rapid yellow, repeat Hardware	30	3640	January 28, 2015
Flashing red (key error). Spark doctor and dfu-util failing Troubleshooting	5	1430	July 17, 2015
Local Cloud - getting setup / troubleshooting Troubleshooting	17	3543	July 10, 2014
Tutorial: Installing DFU-Driver on Windows [24 Feb 2015] Tutorials	57	122836	March 27, 2017

Local cloud don't find cores

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