RE: Nothing happening without USB

Roy — Tue, 14 Jan 2014 14:26:33 GMT

Dear Kristin,

Your assumption was right: i've got an Evaluation kit. The voltage of the battery is 3.2V, so that's enough. I've cut SB8 and inserted a 10 OHM resistor, I measure a Voltage of: 0.0056V so I=U/R = 0.0005 A.

When I remove the Segger jumpers I measure a Voltage of 0.025V => 2.5mA and a LED turns on :D. I think that fixed it. I'll run The master control panel and see if it is advertising. On my Bluetooth 4.0 android device I still see nothing popping up.

------answer----- With the Segger jumpers removed the board springs to life

RE: Nothing happening without USB

FormerMember — Tue, 14 Jan 2014 13:42:16 GMT

Hello,

The issue is hardware related, but it should work fine to run the evaluation kit on battery. I assume you have an evaluation kit? Please try the following:

Measure that the voltage of the battery is actually 3 V.
Connect the battery or another external source to pin 3 and 4 on P1 and check if that works.
Measure the current when running on battery: This can be done by cutting SB 8, and then measure the current by connecting the amperemeter to pin 1 and 2 on P1.

I also recommend you to take a look at the schematic for the evaluation kit so that you can see why the suggestions above should work.

Regards, Kristin