Smart Bluetooth Forum Discussions

Hello,

Can someone clarify the figures on Page 15 of the BCM20736S TRM. 

In Table 5, Current Consumption, what is the supply voltage?  The peak power values below don't seem to correspond.   

The paragraph above mentions a 3V DC-DC converter, which seems a bit random.  What is the recommended supply voltage?  What would the peak power values be if the supply voltage is 3.3V? 

P.S I'm looking at the September 11, 2014 version of the manual. 

Hi j.t,

I have an app that connects to two WICED Sense kits, and enables notification on both. For my purposes, it is crucial that the sensors send data to the android phone at roughly same time, or take turns in sending data (alternating is okay). However, I notice that with the current configurations, the data transmission pattern is very unorganized (sometimes they take turns, sometimes one sends 5-10 msgs in a row before the other one send its data). Is there any way to make this pattern more organized (synced)?

I appreciate your response in advance.

I'm using BCM20737S SIP module, I want to know that does this module support RTS/CTS flow control?

I had read all over the datasheet of BCM20736S, I just find GPIO:P3 as puart CTS, but RTS is missing.

How do I configure transmitWindowOffset and transmitWindowSize for connection event?

Thanks!

Hi,

To ask a quick question, was this problem fixed in SDK2.2.0?

I have not seen this yet but I saw one wakeup from deep sleep for unknown reasons. Which could be our problem so I would rather like to ask to separate issues.

Regards,

Kilian

Hi All,

Our product has a switch and it spends most of its life in the CLOSED position.  When the switch is OPENED, we use an interrupt to WAKE UP from DEEP SLEEP/HIDOFF, use some debounce logic, and do some processing/advertising.  Once the CAP is CLOSED and any CONNECTIONS are also CLOSED, we put the CAP back into DEEP SLEEP.

If in the CLOSED position, we use a high pull-up with a 10k resistor, we would be consuming 300uAh while the switch is CLOSED.   Does anyone have any schematics and associated firmware code for a low power consumption normally CLOSED switch that will interrupt on WAKEUP and then consume low power once it is again CLOSED?  I've seen examples on other chips using GPIO to GPIO switches, but cannot find a Broadcom example.

Thanks!

HI,

Wicked Sense red light stay's on all the time.

                                               Help ; Please

Hi,

I have a problem with programming NVRAM on BCM920737TAG. I have tried every solution taht is available on this forum, but none solved my problem.

Here is the problem:

After i program board board (SW4 set to 1,2,3,4 are ON, 5,6,7,8 are OFF) with SDK NVRAM works ok. It remembers state correctly. Without pluging out USB i can set SW4 to all 8 switches to OFF and reset board and NVRAM sill work correctly – it remembers state when i reset board.

The problem starts when i plug out USB and plug in it again – NVRAM remember last state that was written before pluging out USB .

Could you help me to make NVRAM remember written data despite plugging out usb after programming device?

My Configuration:

My BCM920737TAG board is configured to use SFLASH (resistors are configured configured  and BCM920737TAG_Q32.mk  has set  PLATFORM_NV ?= SFLASH). Board has Vout set to 3.3V. SW2 set to VUSB, SW3 set to VREG.

GPIO is configured as:

#define GPIO_PIN_WP               1

#define GPIO_SETTINGS_WP          (GPIO_OUTPUT | GPIO_INIT_LOW  | GPIO_WP)

const BLE_PROFILE_GPIO_CFG wiced_sense_gpio_cfg =

{

/*.gpio_pin =*/

{

GPIO_PIN_WP,     

-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1     },

/*.gpio_flag =*/

{

GPIO_SETTINGS_WP,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

}

};

And bleprofile_WriteNVRAM(); bleprofile_Read NVRAM(); are used after bleprofile_GPIOInit(bleprofile_gpio_p_cfg); I even use bleprofile_WPEnable(0);.

Wiadomość była edytowana przez: Łukasz Tymczyna

What are the real power consumption advantages when using external oscillator?

We noticed in our tests that when using an external oscillator the power consumption in deep sleep gets reduced by about 3.5µA at 1.7V. Is this to be expected?

What other effects would an external oscillator have beside the higher accuracy of the RTC?

Are there any 'hard numbers' available?

Does the external oscillator has any effect on the infamous Crystal Warm-Up issue?

Hi,

There are two UART ports available on BCM20737. Is it possible to configure either of the ports for host interface?

Basavaraj