Display data of BLE on Android/PC

RE: Display data of BLE on Android/PC

awneil — Thu, 24 Jan 2019 15:18:08 GMT

So why does your post title, and your question, just ask about displaying data?

[quote userid="74022" url="~/f/nordic-q-a/42945/display-data-of-ble-on-android-pc"]The data is sent over BLE. Is there any way I can display the int16 data as it is in android or windows PC.[/quote]

RE: Display data of BLE on Android/PC

Muhammad Nabeel — Thu, 24 Jan 2019 15:12:01 GMT

awneil, I know that but I have to send data over the air not through some wired connection.

RE: Display data of BLE on Android/PC

awneil — Thu, 24 Jan 2019 11:18:12 GMT

[quote userid="74022" url="~/f/nordic-q-a/42945/display-data-of-ble-on-android-pc"]Is there any way I can display the int16 data as it is in android or windows PC[/quote]

Of course, there are plenty of ways!

98% of what any Android or Windows PC does is "displaying data".

As far as displaying the data goes, it is entirely irrelevant where the data came from, or how it was transferred - it's all just data!

eg,

printf( "The data value is: %d\n", my_int_data );

neither knows nor cares where my_int_data came from, or what it means - it simply sends it to stdout in the standard manner:

http://www.cplusplus.com/reference/cstdio/printf/

Many libraries / frameworks are available if you want a graphical display of your data ...

RE: Display data of BLE on Android/PC

Ashish — Thu, 24 Jan 2019 11:04:21 GMT

I think, the nrf52 cpu should be able to handle one sprintf statement.

Although there maybe a better way of doing it. Maybe someone else can help with that.

RE: Display data of BLE on Android/PC

Muhammad Nabeel — Thu, 24 Jan 2019 10:54:13 GMT

would sprintf have any effect on cpu performance?

RE: Display data of BLE on Android/PC

Ashish — Thu, 24 Jan 2019 10:50:58 GMT

Maybe, try something like this.

sensor_string = "%d, %d, %d, %d"

unsigned char string_to_send[25];
sprintf(string_to_send, sensor_string, x, y, z, sensor_time);
ble_uart_nus_string_send(string_to_send, strlen(string_to_send);

RE: Display data of BLE on Android/PC

Muhammad Nabeel — Thu, 24 Jan 2019 10:45:47 GMT

And is there any other way i could convert the integer value into a string.

RE: Display data of BLE on Android/PC

Muhammad Nabeel — Thu, 24 Jan 2019 10:43:30 GMT

Here struct bmi160_sensor_data accel; is of the form

struct bmi160_sensor_data {
	/*! X-axis sensor data */
	int16_t x;
	/*! Y-axis sensor data */
	int16_t y;
	/*! Z-axis sensor data */
	int16_t z;
	/*! sensor time */
	uint32_t sensortime;
};

RE: Display data of BLE on Android/PC

Muhammad Nabeel — Thu, 24 Jan 2019 10:41:36 GMT

I am doing the same actually. Here is the snippet of the code that converts the data raead from IMU sensor(which is int16 ). to char string.

union {
    struct bmi160_sensor_data accel;
    uint8_t ch[8];
}  accelValue;

RE: Display data of BLE on Android/PC

Ashish — Thu, 24 Jan 2019 10:38:34 GMT

Hey,

Maybe you can put your integer value inside a string and send the string to android device. That way there will be no conversion required.

And I think, the data sent should be MSB first, but I am not sure.

RE: Display data of BLE on Android/PC

Muhammad Nabeel — Thu, 24 Jan 2019 10:24:23 GMT

My data is 12 characters long and I have used nRF connect and I am getting the data but in hex format. But I want them to be displayed in real numbers. Also, can you tell me that how ble_uart_nus_string_send service sends a character I mean (LSB first or MSB).

RE: Display data of BLE on Android/PC

Ashish — Thu, 24 Jan 2019 09:36:18 GMT

Hey, you can use nrf Connect for Android or for Desktop.