Display data of BLE on Android/PC

[Muhammad Nabeel]

Hello,

I have a working code to read data from BMI160 an IMU sensor. The data is sent over BLE. Is there any way I can display the int16 data as it is in android or windows PC. Please reply ASAP

[Ashish]

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

[Muhammad Nabeel]

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).  

[Ashish]

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.

[Muhammad Nabeel]

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;

[Muhammad Nabeel]

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;
};

[Muhammad Nabeel]

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

[Ashish]

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);

[Muhammad Nabeel]

would sprintf have any effect on cpu performance?