Problem with MPU6050 and nRF51822 to send Data over BLE..

[Muhammad Nabeel]

I am trying to send the MPU6050 data using BLE nRF51822. I have used ble_app_uart example modified it to read the data over I2C and send the data over BLE. I can successfuly read device ID but when i read accelerometer or gyroscope data I am unable to read any register. Please help me 

[awneil]

So your question is actually just about how to read the sensor - not (yet) about how to send data over BLE.

It is important to take these things one step at a time!

Muhammad Nabeel said:

I can successfuly read device ID

So you must have your basic I2C comms working, then.

Muhammad Nabeel said:

but when i read accelerometer or gyroscope data I am unable to read any register

So there must be something wrong with your higher-level code.

You need to check your code carefully against the MPU6050's datasheet - and confirm that you are doing exactly what it says. 

You should also look at the I2C line with an analyser or oscilloscope to see what is acually happening - and, again, confirm that it meets the datasheet requirements.

This is all standard interface debugging stuff - nothing specifically to do with Nordic.

www.avrfreaks.net/.../2418156

[Muhammad Nabeel]

BLE is working fine actually i am reading the device ID and send it  over BLE which works. 

Here is the snippet. 

	nrf_delay_ms(50);
	mpu6050_register_read(0x75U, &id, 1); // Read the device ID 
    err_code=ble_nus_string_send(&m_nus, gyrValue.temp2, 6); // Send over BLE
				
    APP_ERROR_CHECK(err_code);				
    nrf_delay_ms(2);			
	id=0;