Cannot add function in main.c

RE: Cannot add function in main.c

10Hsin — Wed, 27 Jan 2016 14:03:03 GMT

Thanks for your help! I'll study these issues

RE: Cannot add function in main.c

Anders Strand — Mon, 25 Jan 2016 15:19:54 GMT

You are trying to transmit data faster than the BLE connection can handle. See this, this, this and this.

RE: Cannot add function in main.c

caram5555 — Sat, 23 Jan 2016 06:00:43 GMT

Ok. Then I suggest you transmit your sensor data periodically using timer or delay.

RE: Cannot add function in main.c

10Hsin — Sat, 23 Jan 2016 04:29:21 GMT

In my case, nRF51 acts as an sensor and keep transmitting data, 0-9 are just fake data. After I retrieve data, I'll send it to a platfrom for futher process. But besides 0-9, I still send strings for some specific purpose, so I use uart example. (I use hrs example before)

RE: Cannot add function in main.c

caram5555 — Sat, 23 Jan 2016 04:12:08 GMT

Hi 10Hsin. In your sample program, it constantly transmitting data between 0 to 9. The most important thing is why? Why you transmitting data 0 to 9 to one-side without any event or case? I mean .. transferring data is communication with your friends. Imagine this situation,

you are designning sensor device(BLE UART) that can communicate with your smartphone(Central).
your smartphone connect to your device and send a command to retrieve sensor value.
your device wait for a command
if your device received a sensing command, then your device write data using ble_nus_stringxxx

Best regards.

RE: Cannot add function in main.c

10Hsin — Sat, 23 Jan 2016 03:58:22 GMT

Hi caram5555, cause I'm just a beginner, so I just follow the example, is there any better way to transmit data using UART?

RE: Cannot add function in main.c

caram5555 — Sat, 23 Jan 2016 03:47:55 GMT

Hi 10Hsin.

You too seriously transmitting data.

RE: Cannot add function in main.c

10Hsin — Sat, 23 Jan 2016 03:21:50 GMT

Sorry for asking a stupid question, but appreciate for your help!!

RE: Cannot add function in main.c

RK — Sat, 23 Jan 2016 02:49:19 GMT

what is the results of

ble_nus_string_send() ..

which you put into err_code?

the next line, as is discussed here 50 times a week, is APP_ERROR_CHECK() which will go to the error handler if err_code is not zero. That's the most likely place you've ended up. Use the debugger to find out where you are and how you got there.