Serial read does not work (if(value == 1))

Projects Programming
1

I have problem with serial.read().

I need that when I enter a value of "1", so that divorced IF which lists the current temperature. I do not want to keep me Arduino via delay() list each temperature, but I want to list only the temperature of 1x based on a value of "1".

IF value of work. Why?

void setup() {
  Serial.begin(9600);
}
 
void loop() {
  if(Serial.available())
  {
    byte value = Serial.read();
     if(value == 1)
     {
      Serial.write(value); 
     }
  }
}
2

I need that when I enter a value of "1", so that divorced IF which lists the current temperature.

That collection of words does not form a useful thought.

    byte value = Serial.read();
     if(value == 1)

What is sending the data? If the data is sent as text, you should be testing for having received the character 1, not the value 1.

    if(value == '1')
3

Because you are NOT entering a value of 1 you typed the char '1' ! you have never entered a number on a keyboard you have entered the chars 1 2 3 etc.

Mark

4

I will send data from Raspberry. When you send the number "1," I need to get the current temperature of the Arduino.

Here is a python code

import serial
s = serial.Serial(port='/dev/tty.AMA0', baudrate=9600)
s.write("1")
data = s.read()
print(data);

s.close()
5

When you send the number "1," I need to get the current temperature of the Arduino.

When you send "1", you are sending the character '1', NOT the value 1.