Low power mode question in cyw920719

[NiLi_2861801]

Hi, 

     The sample WICED-Studio-6.2-SDK\common\apps\demo\low_power_sensor,  10s timer will lead the board into SDS mode.  I connect a Ammeter  between PIN2 & PIN4 at jumper J8 and detect current = 0mA while SDS mode. When I press the button(SW3), or connect A5(WICED_P17) to 3.3V,  the board will go a WARM BOOT.

      Then, base on this sample, I modified the file low_power_mode.c (attachment file).  The Ammeter display 0.04mA. and button or P17 will just output a string displaying the event happend, not a boot flow. It seems that the board did not go into SDS.  What did I miss for the sleep configure or other things?

      (What I modified are: delete all the codes about bluetooth, just left the 10S timer and sleep configuration.)

      here are the output:

[2018-06-11_14:32:28]sleep_mode=0

[2018-06-11_14:32:28]Hello Sensor cold Start

[2018-06-11_14:32:28]hello_sensor_application_init

[2018-06-11_14:32:28]idle timer start successful

[2018-06-11_14:32:28]......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................hello sensor idle.   

[2018-06-11_14:32:38].$.$.@.$.$.@.$.$.@

[2018-06-11_14:35:28].$.$.@hello_sensor_interrupt_handler

[2018-06-11_14:35:34].$.$.@

red line display a button press event.

[Anonymous · Accepted solution]

It is necessary to initialize the stack for the device to enter SDS. If the stack is not initialized, the device enters PDS and not SDS.

So, just add a wiced_bt_stack_init in your application and move the call to hello_sensor_application_init() to BTM_ENABLED_EVT in the management callback. That should solve your problem.