Thank you so much .As beginner in electronics I thought it will take a long time for me to make this project working but with your help i made it working in short time and also understood logic's behind the code and the robot in short period of time.I finished testing everything as the next step I am going for final assembly of the robot with proper C.G and as battery powered one with bluetooth compatible. Some suggestion please about places where i can learn more things about robotics and such projects.

Thank you for you reply. 1)I set to "no line ending" calibration for mpu is showing up and successful 2)If u don't mind can you explain what you meant on point 2. 3)I adjusted threshold and it works (no looping) commands seem to work but there is noise in servos and drawing current upto 1 -2 amps 4)what OVERFLOW_THRESHOLD mean? do I need to change it

hi added voltage divider circuit to A0 pin of arduino and i did the following changes but my problems are not solved. then i commented out //#define I2C_EEPROM in Instinch.h and also reduces the number of skills from 43 to 28 removed the remaining skills from except 28 skills from const char* skillNameWithType[] and const char* progmemPointer[] . then uploaded the WriteInstinct to ardiuno but still i cannot calibrate MPU when i enter "Y" nothing is happening I uploaded the code I modified , wiring and test sketches I used for my robot: https://drive.google.com/open?id=1a-4bEgzGVTby1MsBjqiluPbcqb37E4SL I also decided to test everything individually and with the help ModuleTests in the master zip ,below are the results of each test with the wiring serial monitor shows this during I2cDevicetest I2cEEPROM test image 1 I2cEEPROM test image 2 MPUtest the value changes if i move the modlue Serialcomm test Servo test no physical movement from servos only value changes in serial monitor I didn't do tests for buzzer,IRremote,led,ultrasound since i not included them in wiring. Results of moduleTest.ino moduleTest.ino image 1 moduleTest.ino image2 moduleTest.ino image3 I also tried nybble.ino(main sketch) i got following results Nybble.ino image1 Nybble.ino image2 i tried with and without voltage detector results are same (i.e values keep on looping) only thing is when i use voltage detector(A0 pin) looping values are near to 500.00. other thing is i am not using capacitor for PCA9685 module and i am using lab bench power supply for powering PCA9685 (i.e V+ and GND) will that matter?

Thank you so much.Yes I missed out the voltage divider circuit part during wiring i will fix it and update you :).