PIC18F pwm signal to RC ESC for control brushless motor..need help.

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Hi..
Good day everyone.

I'am working on autonomous quadrotor project, i already buy 4 RC ESC with 4 Brushless motor.

I make connection from PIC18F4431 > (through signal cable)ESC > Motor.

The problem is after I program my PIC to send PWM signal through corresponding PIC pin connected to ESC signal cable, when I power up all setup, the motor not running and ESC just make beeb..beeb.. sound continuously.

first of all does the RC ESC can simply receive PWM signal from PIC for control the motor.
 

Hi,
at first refer to maual of your ESC, because all of today's ESC have inbuilt check for control pulse width and correct position of throttle stick on RC transmitter after power up. If ESC is not satisfied with input signal characteristic, then it makes beep..beep and maybe many other nice sound effects
Also check our generated signal on oscilloscope - RC model ESC need servo control compatible signal - pulse width 1us to 2us nominal generated with 20ms period.
Great source of related informations:
A newbie's guide to UAVs - DIY Drones

Regards
Pavel.
 

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