External battery supply issue to DK

RE: External battery supply issue to DK

Yogeshwaran — Thu, 02 May 2019 13:50:51 GMT

i was working previously but i don,t know what i did and now it is not workingdevzone.nordicsemi.com/.../0882.sdk_5F00_config.h

can you look at my sdk_config file and disable uart

RE: External battery supply issue to DK

Yogeshwaran — Thu, 02 May 2019 13:45:30 GMT

hi jan i am working in ble_app_uart example and if comment out uart_init to avoid hanging in external supply it is consuming 2.5mA in advertisement and still hangs in coin cell. here battery is full and no issue with hardware i tried disabling RTT and UARTE, UART0, UART everything still issue remains same.

i couldn't able to understand why current consumption is increasing if i comment out uart init() function and how to make my device run in external power supply

RE: External battery supply issue to DK

Yogeshwaran — Tue, 23 Apr 2019 15:23:38 GMT

Thank you jan Tore it was an issue with uart function only. i had disable uart now everything is working fine

RE: External battery supply issue to DK

Jan Tore Guggedal — Fri, 08 Sep 2017 21:58:48 GMT

Which version of the PCA10056 board are you using? I encountered a similar issue with the same setup and UART example. My issue was that it got stuck in some UART function, possibly because it waited for some response from the onboard Segger chip that never came. Have you tried to connect a debugger (not through USB, but debug in interface) and see what happens? The solution for me was to use RTT instead of UART for debugging. To confirm that the issue was with UART, i disabled logging over UART and didn't run any UART functions in the application. It then started to advertise and function as it should. Another test for this might be to connect the UART pins on the DK to another DK or (some other UART enabled device) and see what data is output, if any.

RE: External battery supply issue to DK

Roger — Fri, 08 Sep 2017 13:07:24 GMT

Hi Martin,

Yes, of course, I checked all those things. The battery is a NiMH battery rated at 3.6V and fully charged at 4.2V. I measured 3V over VDD and 5V over the 5v pin. As I mentioned earlier, the board works fine with an external battery source when I run the Thread client example. Irrespective whether I set the switch to VDD or Li-Po, the board still works with an external battery source. I'm thinking that the problem I'm encountering is perhaps something to do with software when I use the SoftDevice? Is it possible to emulate this test on one of your DK?

RE: External battery supply issue to DK

MartinBL — Fri, 08 Sep 2017 12:48:58 GMT

Hi, That is pretty strange.

Is your battery fully charged?
Have you made sure that the Power Source Switch is set to Li-Po?
What kind of battery is it?