[GitHub] [mynewt-mcumgr] PhilippFinke opened a new issue #28: NMP timeout when uploading image with mcumgr over BLE under Linux

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PhilippFinke opened a new issue #28: NMP timeout when uploading image with mcumgr over BLE under Linux
URL: https://github.com/apache/mynewt-mcumgr/issues/28
 
 
   **Describe the bug**
   Every second time I try to upload an image with mcumgr over BLE under Linux (both Fedora 30 and Yocto based on our custom board) I receive a NMP timeout and the upload aborts. After starting another upload after this timeout the upload succeeds.
   
   The problem occurs with the smp_svr sample on a nrf52840_pca10056 board as well on our custom HW that is also based on a nrf52840. As BLE dongles I used a hama Bluetooth 4.0 USB dongle and the hci_usb sample running on a nrf52840_pca10056.
   
   Additional information: We have a LED display and a status LED on our custom HW that strangely flickers when the NMP timeout occurs. This will last a few seconds and then everything goes back to normal operation.
   
   **To Reproduce**
   Steps to reproduce the behavior:
   
   1. Build and flash the smp_svr sample as described here.
   2. Upload the new image as described in the link above. This shouldn't give a NMP timeout.
   3. Right after 2. upload the same image again. This should give a NMP timeout.
   
   **Expected behavior**
   Uploading an image should work every time without a NMP timeout.
   
   **Screenshots or console output**
   Example output. Here I'm uploading an image for my custom HW but the problem occurs with any other too.
   
   `root@gw-ppf:~# mcumgr --conntype ble --connstring ctlr_name=hci0,peer_id="de:e6:ba:92:2f:60" image upload pa_fw-V0.6.3.bin
   166.34 KiB / 166.34 KiB [=======================================================================================================================================================================================================================] 100.00% 7.91 KiB/s 21s
   Done
   
   root@gw-ppf:~# mcumgr --conntype ble --connstring ctlr_name=hci0,peer_id="de:e6:ba:92:2f:60" image upload pa_fw-V0.6.3.bin
   0 B / 166.34 KiB [---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------] 0.00%
   Error: NMP timeout
   
   root@gw-ppf:~# mcumgr --conntype ble --connstring ctlr_name=hci0,peer_id="de:e6:ba:92:2f:60" image upload pa_fw-V0.6.3.bin
   166.34 KiB / 166.34 KiB [=======================================================================================================================================================================================================================] 100.00% 7.94 KiB/s 20s
   Done
   `
   
   **Environment**
   - OS: Linux Fedora 30 and Yocto based on custom board.
   - Toolchain: gnuarmemb
   - Zephyr v1.14.0

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