Programming nRF51822 smart beacon kit

[Sarah]

Hi,

Where can I find the instructions on what tools need to be installed to reprogram the nRF51822 beacons? I haven't been able to find it in the documentation provided with the kit. I only own the smart beacons and do not have the development kit.

Thanks

[RK]

Should be more than 3.0v unless the battery is getting old when it could be marginal. As far as I can see the beacon kit doesn't have a protection diode so you should get the full battery voltage (on some of the other kits you lose 0.7v through the diode making battery power useless for debugging).

For the sake of ruling it out I'd measure it anyway or power the board from 3.3v off the DK. If that doesn't work, start back on the wiring and check it again, I don't have more ideas.

I just took my DK and used it to program an old nrf51822 eval kit, and that was fine and then I plugged it into a TI board I have and it found that with no problem too, and programmed it, so I know that debug out does work on that board.

I doubt by the way that nrfgo studio knows what's connected to the debugger, so it'll probably show 'DK', that may be unrelated to what the segger is actually programming.

[Sarah]

I checked the voltage coming from the batteries I have. One is giving me 2.8V and the other is 2.89V. Is that not enough for the DK to recognize that there is an external device on the debug out port?

[RK]

I don't know really - all I know is the spec sheet says 3.0v so if you have less than 3.0v that may be your issue. If you measured the batteries with no load it's also possible that when in-use they are less even than that; lithium cells in-use tend to drop another .1v or more.

The DK has 3.3v on a connector somewhere, I've used it, all you should have to do is disconnect the battery and temporarily hook up power from the DK's 3.3v and see if gets the beacon recognised. I'm pretty sure the DK has enough capacity to power the beacon at least for a test especially if the DK itself isn't doing very much.