RTOS/CC2650STK: Sending 2 Samples From Accelerometer data

Tool/software: TI-RTOS

Hi !

I'm using the Sensortag to send accelerometer data to my Pc and graph them on matlab, the comunication is established and everything works fine, I'm using the Sensor Tag code and I just send 6 bytes that are the x y z data from accelerometer, The sensor is sampling every 100 ms and send data every second. It is suppoused that if I'm sampling at 100 ms I have 10 samples from the accelerometer, By now I just send 1 sample (6 bytes) every second, but what I would like to do is to send 2 samples (12 bytes ) every second to my pc ¿Does anyone have an idea of how to do it ?.

Another Q is that Do you know the part of the code that is the buffer where is stored the data when sampling ?

Thank you for your response.

over 8 years ago

0 Christin Lee over 8 years ago

TI__Guru 56635 points

Can you post the modified code you use to send data to your PC? Are you using UART or BLE?

The sensor data length has been set as
In movementservice .h
// Length of sensor data in bytes
#define MOVEMENT_DATA_LEN 18

All the characterisitics regarding movement sensor is implemented in movementservice.c
// Send data
Movement_setParameter(SENSOR_DATA, SENSOR_DATA_LEN, sensorData);

I would recommend you to take a look at simplelink academy training- custom profile to get the full picture of our SW solution.
software-dl.ti.com/.../ble_01_custom_profile.html

0 RH over 8 years ago in reply to Christin Lee

Intellectual 460 points

Thanks !
I was using BLE, I could send 18 bytes of data, Do you know if I could send more than 18 bytes, for example 39 that is the lenght of data you could send through BLE ? I tried but I couln't modify to more than 18 bytes, I don't know if that value is established from the Sensor Tag.

0 Christin Lee over 8 years ago in reply to RH

TI__Guru 56635 points

Please take a look at the simplelink academy training, then you will know how that data is set. If you are using notification, then the maximum data to be sent over the air is 20bytes unless you enable BT 4.2 data length extension feature, which can be found in our software developer's guide when you download BLE -STACK 2.2.1 or higher.

0 RH over 8 years ago in reply to Christin Lee

Intellectual 460 points

Hi ! thanks for your response

Could you please share the link of the simplelink academy to me or where I can find that info.

Thanks in advance !

RH

0 Christin Lee over 8 years ago in reply to RH

TI__Guru 56635 points

You can find the simplelink academy here : software-dl.ti.com/.../overview.html

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RTOS/CC2650STK: Sending 2 Samples From Accelerometer data