# Cannot find device Can0 **URL:** \ **Category:** mangOH Green\ **Created:** [March 5, 2021, 4:44pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280 "2021-03-05T16:44:17Z")\ **Posts on this page:** 20\ **Page:** 4
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 16, 2021, 9:01am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/61 "2021-03-16T09:01:49Z")
what is swice command used for? ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 16, 2021, 9:03am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/62 "2021-03-16T09:03:06Z")
to download modem fw.spk and the following files on the board: ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/2/2fa1c56d82e0c1e2ec8c2f00a358686fb315d799.png) have I to do these actions? ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 16, 2021, 9:06am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/63 "2021-03-16T09:06:01Z")
are you upgrading .update file? If so, you just need to use update command ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 16, 2021, 9:17am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/64 "2021-03-16T09:17:05Z")
yes, but it doesn’t work, so I thinked to do with swiflash, flashing the fw on the board ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 16, 2021, 9:37am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/65 "2021-03-16T09:37:06Z")
.update file is not FW, but application file. ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 16, 2021, 9:45am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/66 "2021-03-16T09:45:57Z")
I managed to swiflash the three files .cwe, .spk and .cwe in a myFirmware.spk, but I can’t flash them on the card with either of the following two methods: ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/8/81ff39000e4dbd16c6b8016565f048ea97806ef4.png) ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/8/81943d9a5bdd4f134eb5af83ee527a7b057f9477.png) ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 16, 2021, 10:00am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/67 "2021-03-16T10:00:58Z")
seems you did not transfer the file to module by scp command. So fwupdate command cannot find it. ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 16, 2021, 10:02am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/68 "2021-03-16T10:02:44Z")
I read that to do this you have to lower switch 7, reset, flash and then raise switch 7 while swiflash works. Let’s hope… ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/6/671beb4fdb17c261729800e4152a28125a7e6492.png) ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 16, 2021, 10:13am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/69 "2021-03-16T10:13:47Z")
Do you think that it could be a right way? It’s still downloading… ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/a/a7856ea67a8b58b6614695507a5c4b96fe15d558.png) Have you ever done this and used swiflash? please 😥 [image] ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 16, 2021, 11:33am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/70 "2021-03-16T11:33:23Z")
No one can help me? After one hour the situation is still this: ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/3/332f3708df3553c7cef160cbd65569a2cbe3fe3a.png) Could be there some problems? ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 16, 2021, 11:34am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/71 "2021-03-16T11:34:53Z")
As said before, use fwupdate ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 16, 2021, 11:36am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/72 "2021-03-16T11:36:43Z")
doesn’t work, I’m trying it since two weeks ago 😥 ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 16, 2021, 11:44am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/73 "2021-03-16T11:44:19Z")
Why does it not work? ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 16, 2021, 12:02pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/74 "2021-03-16T12:02:04Z")
![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/8/81943d9a5bdd4f134eb5af83ee527a7b057f9477.png) in myFirmware there are modem.spk, legato.cwe and yocto.cwe, and I followed this procedure: ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/b/b236a8d72344508f86428d00af48f6f06c90e391.png) So, could be normal the fact that swice still works after two hours or is the device in loop? ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/3/3ac9350c84fb378016a24388529233016b37e6b5.png) ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 16, 2021, 12:08pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/75 "2021-03-16T12:08:54Z")
seems you did not transfer the file to module by scp command. So fwupdate command cannot find it ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 16, 2021, 12:10pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/76 "2021-03-16T12:10:38Z")
no, I transfered the file by scp as I always done ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 16, 2021, 12:14pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/77 "2021-03-16T12:14:25Z")
You can try fwupdate an official spk and see if it works ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 16, 2021, 12:25pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/78 "2021-03-16T12:25:03Z")
i stopped this procedure…the board is in loop, i can’t enter with ssh. I noticed that yocto.cwe makes the device go in loop, every time. the only yocto that worked was for wp76, so it was wrong. i think i have problem with yocto, it is the only source of problems… ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 16, 2021, 12:40pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/79 "2021-03-16T12:40:17Z")
I’m trying also this way… ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/b/b8665a9dd629a73aceadec6c41e87d080acb8298.png) UPDATE: It’s still working after one hour. Could be a problem of the spk file or is it normal? ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/1/13427b83d1cfc2682df3acca5233bf05aab47eb5.png) ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 16, 2021, 4:02pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/80 "2021-03-16T16:02:13Z")
probably module problem, can you switch to another module and test? [Previous page](https://mangoh.discourse.group/t/cannot-find-device-can0/6280.md?page=3) [Next page](https://mangoh.discourse.group/t/cannot-find-device-can0/6280.md?page=5)