Marko, I am using the red bear ble-nano board with the MK20 USB daughter card.
The ble nano is working great stand-alone. The MK20 supports the debugging the nano and an easy serial interface via USB. I¹m looking for experience with serial and debug on the MK20 board as I see the behavior below that is affecting mynewt. Paul >Hi Paul, > > > >I'm curious, what nrf51 are you using exactly? > > > > > >\-- > >**Marco Ferreira** > >Founder / CTO > >[email protected] > > > >[www.altitude.co](https://link.nylas.com/link/d8alirm8yqo9t58fef8uienha/lo >cal- >1612f713-e9be/0?redirect=http%3A%2F%2Fwww.altitude.co%2F&r=ZGV2QG15bmV3dC5 >pbmN >1YmF0b3IuYXBhY2hlLm9yZw==) > > > >DISCLAIMER: The information contained in this e-mail is confidential and >may >be legally privileged. If the reader of this message is not the intended >recipient you are hereby notified that any use, dissemination, >distribution, >or reproduction of this message is prohibited. If you have received this >message in error please forward this message to >[[email protected]](mailto:[email protected]) and delete all copies of this >message. > > > > >On Aug 29 2016, at 7:51 pm, [email protected] wrote: > >> All, > >> > >> I have been adding split image to ble-nano. > >> > >> What I found what that there is something happening with MK20 USB >>daughter >board. When I have the BLE module plugged into the daughter module, I am >not >able to use newtmgr commands with slinky. > >> > >> However, when I unplug the module and wire power/gnd/tx/rx to the board >(with a remote serial port), I am able to use newtmgr. > >> > >> I am thinking there are two issues. > >> > >> > 1\. It seems like there are some serial characters coming out the board >that >is messing with newtmgr: "$$$10950203ADB91E7D92DF9FD5" is an example. > 2\. It would seem that when I make/break a serial connection to the >MK20 via >USB, it is resetting the nrf51 via the debug pins ( the device. Since >newtmgr >does this on every command, this may be causing it not to work. > >> > >> Anyone have any knowledge about this? > >> > >> >Paul >
