Arduino Uno - pyserial communication

[blackleakz2]

Hey, i want to read the ArduinoSerial output with pyserial, so i used:

arduino = serial.Serial(port='/dev/ttyACM0', baudrate=115200, timeout=.1)
while True:
data = arduino.readline()[:-2] #the last bit gets rid of the new-line chars
if data:
print(data)

it works fine, but i want to write after reading serial to arduino with:

arduino = serial.Serial(port='/dev/ttyACM0', baudrate=115200, timeout=.1)
def write_read(x):
arduino.write(bytes(x, 'utf-8'))
time.sleep(0.05)
data = arduino.readline()
return data
while True:
numx = input("Enter a number: ")
valuex = write_read(numx)
print(valuex)

but why ever it dosent work...
is there a simple solution?

[blackleakz2]

my Arduino code is

// Author: BlackLeakz
// Date: 18.05.2022
// Time: 0014
// Website: https://blackzspace.org
// Version: 1
// 3x 16x2 LCD , 1xExternal LED, //-+ potentiometer

// Libarys
#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#include <TimerOne.h>

// LCD DISPLAYS
LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 16, 2);
LiquidCrystal_I2C lcd2 = LiquidCrystal_I2C(0x26, 16, 2);
LiquidCrystal_I2C lcd3 = LiquidCrystal_I2C(0x25, 16, 2);



// SETUP
void setup() {
  //LED + Serialmenu
 pinMode(LED_BUILTIN, OUTPUT);


 Serial.begin(115200);

 while (!Serial) {
     ; // wait for serial port to connect. Needed for native USB
   }

 delay(300);
 Serial.println("___________________________________________________________________________________________________");
 Serial.println("== nemesis_montor | full_control - v0.3 || (c)by BlackLeakz                                      ==");
 Serial.println("---------------------------------------------------------------------------------------------------");
 Serial.println("== !: Write to display  || v: version                                                            ==");
 Serial.println("== (1): Time ||  (2): ping  || (3): tracert  || (4): PIPE || (pot): Potentiometer1               ==");
 Serial.println("===================================================================================================");

 delay(1000);
//init display1
 lcd.init();
 lcd.backlight();
 lcd.setCursor(0,0);
 lcd.blink();
 lcd.print("Version: v.0.1");


// init display2
 lcd2.init();
 lcd2.backlight();
 lcd2.setCursor(0,0);
 lcd2.blink();
 lcd2.print("Lcd2 ready...");


//init display3
 lcd3.init();
 lcd3.backlight();
 lcd.setCursor(0,0);
 lcd3.blink();lcd3.blink();
 lcd3.print("Welcome...");


 delay(4000);

 lcd.clear();
 lcd.home();
 lcd.blink();
 lcd2.clear();
 lcd2.home();
 lcd2.blink();
 lcd3.clear();
 lcd3.home();
 lcd3.blink();


}


// LOOP

void loop() {
    //LED BLINK
 digitalWrite(LED_BUILTIN, HIGH);
 delay(30);
 digitalWrite(LED_BUILTIN, LOW);
 delay(30);
 digitalWrite(LED_BUILTIN, HIGH);
 delay(30);
 digitalWrite(LED_BUILTIN, LOW);
 delay(300);
 digitalWrite(LED_BUILTIN, HIGH);





 if(Serial.available() > 0)  {
 int incomingData= Serial.read(); // can be -1 if read error
    switch(incomingData) {
        case '-1':
            Serial.println("Error");
            break;

        case '!':
            Serial.println("!-: Write to LCD");
            if (Serial.available()) {
            delay(200);
            lcd.clear();
            while (Serial.available() > 0) {
            lcd.write(Serial.read());

           }
             }

        break;

       case 'v':
           Serial.println("Version: v0.1");
           lcd.clear();
           lcd.home();
           lcd.print("Version: v0.1");
           delay(1000);
           break;

       case '1':
          Serial.print("Get current time");
          lcd.clear();
          lcd.setCursor(0, 0);


       default:
          // handle unwanted input here
          break;
  }

}
}

[sterretje]

Please post your python code using code tags. I'm quite sure that you're aware that indentations have a meaning in Python and they are now gone.

"but why ever it dosent work..." is a very vague description; what do you expect it to do and how does it differ from what is hapening.