[Saatwik]

some time when connections are not correct it show  "No JTAG devices detected" . please check your connection twice .,may be problem in connection.

[Saatwik]

This may help you https://www.engineersgarage.com/contribution/mobile-app-controlled-robot

[Saatwik]

Make sure your GSM module is powered properly. just press reset button in MCU after the GSM module got network and nework led start blinking becouse GSM start work after getting network but MCU giving AT command at first before GSM got network may be that's a reason 

[Saatwik]

you can get help from this project https://www.engineersgarage.com/microcontroller/8051projects/liquid-level-alarm-AT89C51-circuit

[Saatwik]

you can get idea from this to get input from sensor just connect the sensor at place of potentiometer. https://www.engineersgarage.com/embedded/avr-microcontroller-projects/adc-circuit

[Saatwik]

if you are getting error that PWM_H_ file in not found then you should check first your library name if it is PWM.h make sure in the program it is same at the time of include.

 

[Saatwik]

if you don't know how to programe controllers just go with arduino uno that will easy for you.

 

[Saatwik]

it`s depend upon need if you want small display you can use led displays but if you want a large one you can use led matrix

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