Send ble advertising and transmit the message on BLE at certain interval and then sleep and wake at regular interval

RE: Send ble advertising and transmit the message on BLE at certain interval and then sleep and wake at regular interval

sara — Wed, 03 Jul 2019 12:10:12 GMT

Ok will look into it, if I can manage with interrupts or not.

RE: Send ble advertising and transmit the message on BLE at certain interval and then sleep and wake at regular interval

Hung Bui — Wed, 03 Jul 2019 11:58:34 GMT

I see. But be aware that you can have different interrupt priorities. Most of the case the application can be solve by using normal ISR system.

RE: Send ble advertising and transmit the message on BLE at certain interval and then sleep and wake at regular interval

sara — Wed, 03 Jul 2019 08:54:33 GMT

I need freertos to prioritize the different tasks

RE: Send ble advertising and transmit the message on BLE at certain interval and then sleep and wake at regular interval

Hung Bui — Wed, 03 Jul 2019 07:42:36 GMT

Do you have a particular reason why you need to use FreeRTOS for such application ? For power optimization it's not suggested to use FreeRTOS if not needed.

RE: Send ble advertising and transmit the message on BLE at certain interval and then sleep and wake at regular interval

sara — Wed, 03 Jul 2019 04:03:57 GMT

I had used ble_app_hrs_freertos example from SDK 15.3.0.

RE: Send ble advertising and transmit the message on BLE at certain interval and then sleep and wake at regular interval

Hung Bui — Tue, 02 Jul 2019 14:27:19 GMT

Please state which firmware you are using ? Looks like the CPU woken up to do something.

RE: Send ble advertising and transmit the message on BLE at certain interval and then sleep and wake at regular interval

sara — Tue, 02 Jul 2019 05:34:11 GMT

I tried with disabling NRF_LOG_ENABLED but I am getting some other peaks which I have encircled yellow in the image attached. so why is this ? rest currrent measuremnts are ok but getting these peaks. system on current is 1.733 uA and system off current is 0.412 uA.

RE: Send ble advertising and transmit the message on BLE at certain interval and then sleep and wake at regular interval

sara — Tue, 02 Jul 2019 03:50:51 GMT

Ok, thank you. And if I want to use freertos so how should I port it with ble example? I have referred the following link: https://devzone.nordicsemi.com/f/nordic-q-a/35386/application-with-freertos---lowest-possible-current-in-idle so I am a bit worried because I too need a power-optimized freertos working example with BLE, where a system on current should be around 2 uA and not more than that.

RE: Send ble advertising and transmit the message on BLE at certain interval and then sleep and wake at regular interval

Hung Bui — Mon, 01 Jul 2019 14:49:51 GMT

Hi,

There wouldn't be an example does exactly the same as you described. But I don't see any problem making such an application. I would suggest to get started with an BLE example in our SDK. You can start with ble_app_pwr_profiling or ble_app_hrs.

If you find the advertising module is too complex to use, you can think of using the Softdevice APIs directly to do advertising.

You can have a look at this tutorial: https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-advertising-a-beginners-tutorial