Void value not ignored as it ought to be error

Projects Programming
1

Hello, I have a problem in the coding part.
I will do wireless servo control with muscle sensor
but it keeps giving this error in transmitter.
"void value not ignored as it ought to be"
can you help. footnote: code is attached
sketch_jun20a.ino (1.6 KB)

2

Your topic was MOVED to its current forum category as it is more suitable than the original

Please post your code here, using code tags when you do

3

#include <SPI.h>
#include "RF24.h"
#include "Wire.h"
#include "I2Cdev.h"
#include "nRF24L01.h"

#include <Servo.h>
#define THRESHOLD 250
#define EMG_PIN 7
#define SERVO_PIN 9
Servo SERVO_1;

int emo[1];
int muscle[1];

RF24 radio(9,10);

const uint64_t pipe = 0xE8E8F0F0E1LL;

void setup(){
Serial.begin(9600);
SERVO_1.attach(SERVO_PIN);
radio.begin();
radio.openWritingPipe(pipe);
}

void loop(){

int value = analogRead(EMG_PIN);

if(value > THRESHOLD){
emo[0] = SERVO_1.write(170);
radio.write(&emo, sizeof(emo));
}

else{
muscle[0] = SERVO_1.write(10);
radio.write(&muscle, sizeof(muscle));
}

Serial.println(value);
}

4

As to your problem, what value does SERVO_1.write() return ?

2 Likes
5

int value = analogRead(EMG_PIN); // read the muscle sensor
threshold=250
if(value > THRESHOLD)
emo[0] write 170 degrees

else
muscle[0] write 10 degrees

6

@emohizli did you deliberately ignore the request to use code tags when posting code ?

Please follow the advice given in the link below when posting code, in particular the section entitled 'Posting code and common code problems'

Use code tags (the </> icon above the compose window) to make it easier to read and copy for examination

I have no idea what post #5 is about

muscle[0] = SERVO_1.write(10);

the write() function does not return a value so what were you hoping that it would return ?

7

There is 1 servo in the system . In the code, the servo has 2 values. rotate 170 degrees if the value read is greater than threshold. else rotate 10 degrees

8

I repeat

9

I don't understand what you mean. Can you give some details? My English is not very good.

10 
#include <SPI.h>                      
#include "RF24.h"                    
#include "Wire.h"                     
#include "I2Cdev.h"                   
#include "nRF24L01.h"                 

#include <Servo.h>
#define THRESHOLD 250
#define EMG_PIN 7
#define SERVO_PIN 9
Servo SERVO_1;

int emo[1];
int muscle[1];


RF24 radio(9,10);                     
                                      
const uint64_t pipe = 0xE8E8F0F0E1LL; 


void setup(){
 Serial.begin(9600);                 
  SERVO_1.attach(SERVO_PIN);
  radio.begin();                      
  radio.openWritingPipe(pipe);        
}


void loop(){

  int value = analogRead(EMG_PIN);


  if(value > THRESHOLD){
    emo[0] = SERVO_1.write(170);
    radio.write(&emo, sizeof(emo));
  }

  else{
    muscle[0] = SERVO_1.write(10);
    radio.write(&muscle, sizeof(muscle));
  }

  Serial.println(value);
}
11 
muscle[0] = SERVO_1.write(10);

You are trying to get a value that has been returned by the write() function and save it to muscle[0]

Why ?

12

because I coded the servo in the receiver codes to work with the muscle[0] command

14

look at the void loop. This is an example of the code i want to write

image
image1366×768 40.5 KB

15

Thank you very much for your help i found the error stay safe

16

Please post your working code here (in code tags) to help anyone else with a similar problem

17

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