arduino problem :

#include

#include

#include

#include

#include

Servo servo; $//$Servo $$ servo$$

RF$24$ radio$(7,8)$; $//$ CE $7,$ CSN $8$

const byte address$[6]="00001"$; $//$

#define LmotorCW $5$

#define LmotorCCW $6$

#define RmotorCW $9$

#define RmotorCCW $10$

#define LmotorSpeed $3$

#define RmotorSpeed $4$

#define waterpump $2$

int waterValue $=0$;

int state $=0$; $//0$: idle, $1$: forward, $2$: stop, $3$: pumping, $4$: backward

int value $=0$;

void setup$()\{$

pinMode$($LmotorCW$,$ OUTPUT$)$;

pinMode$($LmotorCCW$,$ OUTPUT$)$;

pinMode$($RmotorCW$,$ OUTPUT$)$;

pinMode$($RmotorCCW$,$ OUTPUT$)$;

pinMode$($waterpump$,$ OUTPUT$)$;

servo.attach$(0)$;

analogWrite$($LmotorSpeed$,255)$; $//$ Motor L $(0$~$255)$

analogWrite$($RmotorSpeed$,130)$; $//$ Motor R $(0$~$255)$

setupRadio$()$;

Serial.begin$(9600)$;

Timer$1.$initialize$(500000)$; $//500$ms $=500000$us

Timer$1.$attachInterrupt$($watercheck$)$; $//$ Attach the service

$\}$

void watercheck$()\{$

receiveData$()$;

Serial.print$("$Received Water Sensor Value: $")$;

Serial.println$($waterValue$)$;

Serial.print$("$motor : $")$;

Serial.println$($value$)$;

Serial.print$("$State : $")$;

Serial.println$($state$)$;

$\}$

void setupRadio$()\{$

radio.begin$()$;

radio.openReadingPipe$(1,$ address$)$; $//$

radio.setPALevel$($RF$24\_$PA$\_$MIN$)$; $//$

radio.startListening$()$; $//$

$\}$

void go$()\{$

value $=30$;

servo.write$($value$)$;

delay$(500)$;

digitalWrite$($LmotorCW$,$ LOW$)$;

digitalWrite$($LmotorCCW$,$ HIGH$)$;

digitalWrite$($RmotorCW$,$ HIGH$)$;

digitalWrite$($RmotorCCW$,$ LOW$)$;

delay$(2000)$;

$\}$

void stop$()\{$

digitalWrite$($LmotorCW$,$ LOW$)$;

digitalWrite$($LmotorCCW$,$ LOW$)$;

digitalWrite$($RmotorCW$,$ LOW$)$;

digitalWrite$($RmotorCCW$,$ LOW$)$;

$\}$

void backward$()\{$

digitalWrite$($LmotorCW$,$ HIGH$)$;

digitalWrite$($LmotorCCW$,$ LOW$)$;

digitalWrite$($RmotorCW$,$ LOW$)$;

digitalWrite$($RmotorCCW$,$ HIGH$)$;

delay$(2000)$;

$\}$

void receiveData$()\{$

if $($radio$.$available$())\{$

char waterValueStr$[10]$; $//$

radio.read$($&waterValueStr, sizeof$($waterValueStr$))$; $//$

waterValue $=$ atoi$($waterValueStr$)$; $//$

$\}$

$\}$

void loop$()\{$

switch $($state$)\{$

case $0$: $//$ idle

if $($waterValue $>=690)\{$

delay$(3000)$;

go$()$;

stop$()$;

delay$(3000)$;

state $=1$;

$\}$

break;

case $1$: $//$ forward

digitalWrite$($waterpump$,$ HIGH$)$;

delay$(100)$;

$//$

state $=2$;

break;

case $2$:

delay$(3000)$;

digitalWrite$($waterpump$,$ LOW$)$;

delay$(1000)$;

state $=3$;

break;

case $3$: $//$ stop

backward$()$;

stop$()$;

state$=0$;

break;

$\}$

$\}$

problem :

If you write servo.write in the setup here, it works well, but if you write servo.write in the loop function, it doesn't work

It works well when operating with the code below, so I don't think it's a final question

What's wrong with the code above?

#include $//$Adding the Servo library

Create a servo object with a Servo service; $//$Servo class

int value $=0$; $//$ variable value to adjust the angle

void setup$()\{$

servo.attach$(0)$; $//$connect to the servo servo motor pin $7$

$//$ Connect to a digital pin that supports PWM with ~ indications

value $=0$;

servo.write$($value$)$; $//$rotate at an angle of value. ex$)$ rotate $90$ degrees if value is $90$ degrees

delay$(500)$;

$\}$

void loop$()\{$

for $($value $=0$; value $<=180$; value $+=1)\{$

$////$ in steps of $1$ degree

servo.write$($value$)$;

delay$(15)$;

$\}$

for $($value $=$ value; value $>=0$; value $-=1)\{$

servo.write$($value$)$;

delay$(15)$;

$\}$

$\}$