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Hello, I see the MPL3115A2 in the list of supported devices, but it doesn't seem to be present in the code. Even the github link on http://www.i2cdevlib.com/devices/mpl3115a2#source points to code that doesn't exist. I just got one of these so if it's really supported, that would be great. Thanks, Marc

Hey! I've got a GY-86 with MPU6050, a Barometer and the HMC5883L. On the Arduino (UNO) I get the MPU to work. But I can't figure out how to get the magnetometer data! I2C scanner tells me: Scanning... I2C device found at address 0x68 ! I2C device found at address 0x77 ! done and 0x68 is definately the mpu6050. And since I know, that it can be a master again, I suspect, that the other would be barometer and the HMC is on the slave of the MPU. Am I right with that? Can anybody tell me how I can proceed? Check my assumption or just get the mag data? Any help much appreciated!!

Hi I'm new to Arduino and I'm trying to use a 6DOF IMU (the MPU-6050) along with the i2cdevlib. I've been able to set the libraries and to execute a sketch in order to calculate the offset of the IMU starting from the raw data. Now I'm trying to execute the example code that i found on the github of the i2cdevlibhttps://github.com/jrowberg/i2cdevlib/blob/master/Arduino/MPU6050/Examples/MPU6050_DMP6/MPU6050_DMP6.ino setting the output in the YPR modeCode: #define OUTPUT_READABLE_YAWPITCHROLL with and without my offset parameters. In both sketches I found the same issue. The data on the serial shift from the initial position for 5-8 second showing an increment of several degrees (depends on the cases but usually there are 12-25 degrees) of the YPR angles without moving the IMU. The same thing happen with the Euler anglesCode: #define OUTPUT_READABLE_EULER I've tried also to execute the quaternion output modeCode: #define OUTPUT_READABLE_QUATERNION which i don't know how to read (I'm just started learning about this) but the value I read on the serial seems to stay "stable". I might solve this with a delay from the turn on which allow me to see of how much degrees the IMU "virtually moved" and then subtract that value to future reading (such as another offset) but i find this not usefull since I need the IMU to have the right angles on the turn on. Thanks for reading, hope someone could help me

I was under the impression that the default range for the MPU-6050 accelerometer was +/-2g, but after doing some datalogging I'm beginning to think that is only the case for the raw values (i.e. using MPU6050_raw.ino) and not true when using the DMP (i.e. using DMP6050_DMP6.ino). The values I obtained are half of what I believe they should be, leading me to believe that with DMP the default range is +/-4g. I found a line in MPU6050_6Axis_MotionApps20.h that only confuses me more: // get rid of the gravity component (+1g = +8192 in standard DMP FIFO packet, sensitivity is 2g) If the sensitivity is 2g, doesn't 1g = 16,384? Or am I reading the datasheet incorrectly? At this point I'm pretty confused and hopefully somebody can clear it all up for me...

Hello, Thanks to Jeff for his work ! I couldn't even try using DMP without his code... The MPU6050_raw works well with my sparkfun mpu6050 connected to an arduino uno. The MPU6050_DMP6 has an irregular behavior. When launching, the serial monitor says "DMP ready! Waiting for first interrupt...", and indeed it waits a pretty long time... The interrupt pin is connected to arduino pin 2 I've also tried to connect the vio to arduino 3.3v The point is that I've no interrupt signal when connecting an oscilloscope on INT pin of the mpu... is there a hardware issue ? or should I initialize something in the mpu ? Thanks for your response damien

Hi, I am new to this so please bear with me. My current project requires that i use multiple MPU6050's in order to track the motion of a person. I am aware that the MPU6050 has two addresses and that in the code supplied by jeff you can state which address on the I2C bus to read from. The problem is with the use of the DMP code and interrupts, am I able to attach the second IMU to the alternate interrupt pin on the Arduino Pro Mini that I am using? If i was to do this what would i have to do in the example code and/or the libraries in order to determine which interrupt is read etc. I have tried to interpret the libraries to see if there was a line of code that states which interrupt pin is being used but i quite frankly dont know what i am looking at or looking for. I hope that someone will be able to help me. Thanks

Hi im trying to access the magnetometers data. I am using Energia. THe following code is being used. The x,y,z values are all nearly the same. If anyone can please post a fix with code this would be helpful.

I got the teapot demo to work after MANY hours. My 6050 IMU GY-521 is connected with 5 wires GND,V+,SDA,SCL and INT. BTW you do need a reset button on the arduino (so the MiniPro will not work). Then make sure to edit the INO from https://github.com/jrowberg/i2cdevlib/tree/master/Arduino/MPU6050/Examples/MPU6050_DMP6 to enable teapot format output by commenting out 'yawpitch' and uncommenting the 'teapot' lines like so: //#define OUTPUT_READABLE_YAWPITCHROLL #define OUTPUT_TEAPOT Make sure the baud rates are the same in the INO and the PDE: Then run the processing PDE from the below link (with the toxiclib PDE library installed): https://github.com/jrowberg/i2cdevlib/tree/master/Arduino/MPU6050/Examples/MPU6050_DMP6/Processing ... After a few seconds you should see a small window pop up with an airplane in it. If it does not move, just press the reset button on the arduino and the plane will start moving. I am running win7 32bit and Java V7, PROCESSING V2 and IDE v 1 05 . I also found that If I get Java error messages, the only way to correct this , is to reboot the PC.

Hello, Basically what I am doing is I have the ADS1115 in single channel mode, measuring the voltage across a resistor, which indicates the current flowing through the resistor. The current comes from an AC Current Clamp which sits on my mains power board. Basically what I am trying to do is measure the current flowing, using information I have found on the openenergymonitor.org site. They have a library which basically offsets the AC wave into the positive space, then filters out the wave in code and samples the wave to get an average, which then gives you the current flowing in the AC line. They have used the standard 10 bit ADC on the Arduino, but I wanted to use the 16bit ADS1115 instead. I have set the Gain to be 4.096, and have tried 860samples/second in continuous mode, but I am seeing very weird results sometimes. Its like Channel 0 is merging into Channel, and 2 into 3, or some other random combination, and I cannot fully understand what is going on. I found a similar problem described on the Adafruit website http://forums.adafruit.com/viewtopic.php?f=19&t=54496 This is however using their own library, but one guy mentions yours and said it has a similar problem. He describes a fix, but I cannot find where to apply that. I am also using a Chipkit board, so its running at 80Mhz compared to the 16Mhz of the Arduino. I was wanting to know if you could tell me if there is any reason why doing sampleI = adc.getConversionP1GND(); quite fast, would cause problems. I was under the impression that you could call this as often as you liked, and it would just report the current figure that the ADS1115 had measured at the time, since its in continuous mode. Is that right? Here are the 2 main functions I have in my code, which is mainly copied out of the example from the openenergymonitor.org website double calcIrms(int NUMBER_OF_SAMPLES, int Channel) { double ADC_COUNTS = 24512; //portion of 15bit count used for range double SUPPLYVOLTAGE = 3064; //3.064V is the full scale I can output into sensor from clamp double ICAL = 100; //current constant = (100 / 0.050) / 20 = 100 for (int n = 0; n < NUMBER_OF_SAMPLES; n++) { lastSampleI = sampleI; if(Channel == 1) { sampleI = adc.getConversionP1GND(); } else if(Channel == 3) { sampleI = adc.getConversionP3GND();; } else { return 0; } lastFilteredI = filteredI; filteredI = 0.996 * (lastFilteredI + sampleI - lastSampleI); // Root-mean-square method current // 1) square current values sqI = filteredI * filteredI; // 2) sum sumI += sqI; } double I_RATIO = ICAL * ((SUPPLYVOLTAGE / 1000.0) / (ADC_COUNTS)); double Irms = I_RATIO * sqrt(sumI / NUMBER_OF_SAMPLES); //Reset accumulators sumI = 0; return Irms; } void loop() { Irms1 = calcIrms(100, 1); // Calculate Irms only Irms3 = calcIrms(100, 3); // Calculate Irms only apparentPower1 = supplyVoltage * Irms1; //extract Apparent Power into variable apparentPower3 = supplyVoltage * Irms3; //extract Apparent Power into variable } I am displaying this to a TFT LCD and sometimes the figures just drop to 0 and stay there, and now and then the numbers blink to show something, and then go away again. Any help you could provide would be appreciative, esp if you see that I am doing something stupid. Regards WanaGo

Hi, I'm having a bit of trouble understanding the output of the L3G4200D Gyroscope. When I run the sample program I get an output on all axis between 0 and 255. It doesn't seem to distinguish between clockwise rotation and anti-clockwise rotation. Here's an example of the output from running https://github.com/jrowberg/i2cdevlib/blob/master/Arduino/L3G4200D/Examples/L3G4200D_raw/L3G4200D_raw.ino (excluding Serial.print("angular velocity:\t"); ) Does anyone know if this is correct? Initializing I2C devices... Testing device connections... L3G4200D connection successful 183 213 32 8 253 19 9 255 23 11 0 26 8 252 17 11 255 24 11 253 16 7 252 20 8 253 17 12 254 17 8 1 18 10 255 17 12 250 19 5 251 19 13 0 22 10 254 19 13 254 18 10 254 18 13 254 15 13 1 25 10 254 20 14 255 17 13 250 20 18 255 21 11 0 19 14 1 14 14 255 16 12 0 17 7 255 19 10 252 19 13 254 18 10 248 14 7 254 15 10 252 20 8 253 19 10 251 14 11 254 18 11 3 19 10 255 12 9 252 18 13 3 20 9 255 18 9 4 24 13 1 18 8 4 17 16 0 16 10 0 22 7 1 12 15 255 16 10 1 21 11 255 23 6 0 19 9 252 23 11 4 15 7 252 20 8 1 20 5 1 20 11 254 15 7 252 16 15 255 15 11 254 18 14 250 20 14 254 20 6 255 25 8 250 21 7 255 22 12 253 23 11 0 14 11 252 20 8 253 24 10 251 16 5 251 18 12 254 20 18 254 18 15 254 24 3 255 22 5 251 15 9 0 18 7 249 20 12 255 22 7 252 21 12 3 19 11 253 22 13 253 17 13 1 15 13 1 21 8 251 16 7 255 16 13 250 23 8 255 16 10 252 18 9 1 20 10 255 17 14 252 18 9 251 13 11 254 19 12 253 22 9 1 15 13 251 19 9 255 20 6 249 16 8 253 17 10 1 24 8 253 18 9 253 16 10 248 22 7 251 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