Accelerometer data advertising

[Ridhi]

i have to advertise Lis3dh data. I have accelerometer and nrf52840 dk. Pls assist how can i advertise the data of lis3dh xyz values 

[Amanda Hsieh]

Hi, 

I would suggest you take a look at Beacon Transmitter Sample Application or Direction finding connectionless beacon on how to advertise with data, and search for similar use cases on Davzone. 

-Amanda H.

[Ridhi]

hi,

i know about the Beacon example and know about the advertising. But now i want to advertise the data of lis3dh accelerometer. pls assist me with some code that i can implement

[Ridhi]

I am able to set the manufacturer data with values of lis3dh in advertising mode. I am abel to get values 

0x00010A this is the lis3dh data but i want that these acceleration values should be displayed in floating format

[Ridhi]

hello, am able to receive the data values in manufacturing packet. But i am only able to get x axis data kindly assist how to parse the values:

i have float LIS3DH_Acc[3];

these are the values i receive: 

uint8_t tmp[6] = {0};
int16_t tmp_int16[3] = {0};
uint8_t status = 0;

//check data ready?
i2c_read(LIS3DH_I2C_ADDRESS ,(LIS3DH_REGISTER_STATUS_REG2), &status, 0x01);
if(status & LIS3DH_STATUS_REG_ZYXDA)
{
i2c_read(LIS3DH_I2C_ADDRESS ,(LIS3DH_REGISTER_OUT_X_L | LIS3DH_READ_MULTI_BYTES), tmp, 0x06);
tmp_int16[0] = (int16_t)((tmp[1]<< 8) | tmp[0]);
tmp_int16[1] = (int16_t)((tmp[3]<< 8) | tmp[2]);
tmp_int16[2] = (int16_t)((tmp[5]<< 8) | tmp[4]);

LIS3DH_Acc[0] = (float)(tmp_int16[0]) * LIS3DH_ACC_CONVERT_8G;
LIS3DH_Acc[1] = (float)(tmp_int16[1]) * LIS3DH_ACC_CONVERT_8G;
LIS3DH_Acc[2] = (float)(tmp_int16[2]) * LIS3DH_ACC_CONVERT_8G;

now, i have to put these values in data field of advertising packet manufacturer data

manuf_data.company_identifier = 0xFFFF;
manuf_data.data.p_data = data;
manuf_data.data.size = sizeof(data);

 in this i want to put the data of LIS3DH_ACC how to put LIS3DH_Acc[0],LIS3DH_Acc[1],LIS3DH_Acc[2] values in data field?? 

[Amanda Hsieh]

Have a look at this case.

-Amanda H. 

[Ridhi]

Hello,

thanku for assistance

i am able to receive the data of lis3dh in manufacturer data field. My issue is that i am receiving data in HEX format values. I want to view it in form of float. how to view?

[Ridhi]

Gentle Reminder

Also, i want that my advertisement of lis3dh data to be indfinite duration. I am trying to change 

APP_ADV_DURATION    to 0

and BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;

but still my adverting gets stopped and no change is viewd kindly help 

[Amanda Hsieh]

You may do so by starting advertising following the BLE_ADV_EVT_IDLE event that is generated when the advertising module moves to idle.
Please see this ticket answer by my colleague.

The tool cannot be adjusted to present the float format in the manufacturer data field.

-Amanda 

[Ridhi]

I have followed this but when i increase my 

 I am trying to change 

APP_ADV_DURATION to be more than 180 seconds but i am not able to do so.

I am getting advertisement data only for 3 mins not beyond that 

[Amanda Hsieh]

Hi,

Max. advertisement time with the BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE flag is 180 seconds, see BLE_GAP_ADV_TIMEOUT_LIMITED_MAX . 

Do you get BLE_ADV_EVT_IDLE event after APP_ADV_DURATION is been expired? If so, start advertising following the BLE_ADV_EVT_IDLE event.

-Amanda

[Ridhi]

when i have i have:

 BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE; 

APP_ADV_DURATION to 18000 and 

static void on_adv_evt(ble_adv_evt_t ble_adv_evt)

{ uint32_t err_code;

switch (ble_adv_evt)

{ case BLE_ADV_EVT_FAST:

err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);

APP_ERROR_CHECK(err_code);

break;

case BLE_ADV_EVT_IDLE:

sleep_mode_enter();

break;

default:

break; } }

my device advertises for 3 mins.

BUT when 

changed flags to BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;

and APP_ADV_DURATION to 0 ; 

case BLE_ADV_EVT_IDLE:

 err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST); APP_ERROR_CHECK(err_code);

break;

default:

break;

but this way the device stops advertising.

What i need is that my device should advertise unlimitedly

pls help

[Amanda Hsieh]

Hi, 

Changing to BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE and setting APP_ADV_DURATION to 0 should advertise unlimitedly. You need to debug or check the debug log to see why BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE causes to stop advertising. 

If you use BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE, you can start advertising in the BLE_ADV_EVT_IDLE event.

I will be out of the office for the next few days and back next Monday. If you still have the issue, please create a new support case. Sorry for the inconvenience. 

Regards,
Amand