# SL6087 blocked in bootloader mode

**URL:** <https://forum.sierrawireless.com/t/sl6087-blocked-in-bootloader-mode/29652>\
**Category:** Open AT\
**Tags:** fw-upgrade\
**Created:** [April 30, 2023, 2:08pm UTC](https://forum.sierrawireless.com/t/sl6087-blocked-in-bootloader-mode/29652 "2023-04-30T14:08:00Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![bobtnt1](https://avatars.discourse-cdn.com/v4/letter/b/b487fb/32.png) [@bobtnt1](https://forum.sierrawireless.com/u/bobtnt1)\
**Post date:** [April 30, 2023, 2:08pm UTC](https://forum.sierrawireless.com/t/sl6087-blocked-in-bootloader-mode/29652/1 "2023-04-30T14:08:00Z")

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Hi to all!  
We have some SL6087 modems with s/n: BE130… On all of them there are following problem:

1. Modem recognized as Sierra Wireless CDC EEM Product 1A:  
 ![1](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/7/7aaa5e7dc0a2f915cd7bcaed4e0a695960d25c43.png)  
and no serial ports
2. In Developer Studio 3.6 there are COM3 device, after open it we have such responce:  
 ![2](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/2/2e17d368cc1f41585c5c129cdb591253b8de4d65.png)
3. In Target Management it is impossible to upload bootloader or firmware:  
 ![3](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/9/968a8988b750e49b2bc86093776bca57f0025b09.png)
4. After port is opened, low cmd is supported:

----------------- Port opened -----------------  
AT  
OK  
AT+WMSN  
ERROR  
AT+CFUN=1  
ERROR  
at  
OK  
atw  
OK  
atw  
OK  
wat+wdwl?  
ERROR  
at+wdwl?  
ERROR  
ati9  
United States

OK  
ati3  
LSI Softmodem Version 2.2.89.2

OK  
ati6  
OK  
ati5  
2.2.89.2, HDA MB, HDA, A35 S-Rev:2 L-Rev:3, 19

OK

1. DwlWin also cant work because at+wdwl gives error.

Is it possible to recover modem and use it as open at device?

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<div class="post-metadata">

**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\
**Post date:** [April 30, 2023, 2:54pm UTC](https://forum.sierrawireless.com/t/sl6087-blocked-in-bootloader-mode/29652/2 "2023-04-30T14:54:24Z")

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Dwlwin is not using +wdwl, it is using boot pin to trigger the download mode

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<div class="post-metadata">

**Author:** ![bobtnt1](https://avatars.discourse-cdn.com/v4/letter/b/b487fb/32.png) [@bobtnt1](https://forum.sierrawireless.com/u/bobtnt1)\
**Post date:** [April 30, 2023, 3:26pm UTC](https://forum.sierrawireless.com/t/sl6087-blocked-in-bootloader-mode/29652/3 "2023-04-30T15:26:31Z")

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boot pin must be connected to 1.8v and after that with dwlwin it is possible to overwrite bootloader?

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<div class="post-metadata">

**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\
**Post date:** [May 1, 2023, 2:28am UTC](https://forum.sierrawireless.com/t/sl6087-blocked-in-bootloader-mode/29652/4 "2023-05-01T02:28:58Z")

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Have you tried with dwlwin?

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**Author:** ![donaldparr8080](https://avatars.discourse-cdn.com/v4/letter/d/a8b319/32.png) [@donaldparr8080](https://forum.sierrawireless.com/u/donaldparr8080)\
**Post date:** [May 1, 2023, 10:31am UTC](https://forum.sierrawireless.com/t/sl6087-blocked-in-bootloader-mode/29652/5 "2023-05-01T10:31:20Z")

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Have you resolved it?

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<div class="post-metadata">

**Author:** ![bobtnt1](https://avatars.discourse-cdn.com/v4/letter/b/b487fb/32.png) [@bobtnt1](https://forum.sierrawireless.com/u/bobtnt1)\
**Post date:** [May 1, 2023, 7:34pm UTC](https://forum.sierrawireless.com/t/sl6087-blocked-in-bootloader-mode/29652/6 "2023-05-01T19:34:02Z")

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not yet. there are some problems to change boot pin state. i will try at this week and write result here. thanks!