Serial OTG. Arduino CH340. FTDI. rkl099's Extension

Juan_Antonio · October 27, 2022, 10:41am

7.- Testing version 2022-10-19.

https://github.com/rkl099/Appinventor_Debug

Arduino UNO (CH340). Cable OTG. Cable USB.

otg17b

Settings / Additional settings / OTG / Enable OTG.
Android 9. MIT Companion and installed.

Arduino UNO (CH340)

String a;
String b;
int c;
int d;

void setup() { 
  Serial.begin(9600);
}

void loop() { 
  if(Serial.available()) {
    a = Serial.readStringUntil(',');
    b = Serial.readStringUntil('\n');
    c = a.toInt() + b.toInt();
    d = a.toInt() * b.toInt();
    Serial.print(c);
    Serial.print(",");
    Serial.println(d);
}
}

App sends two numbers separated by commas.
Arduino receives them via Serial.
Separate the two numbers.
Add them and multiply them.
Returns the addition and multiplication separated by commas.
App receives the data, converts it into a list and displays it.

otg_5

otg_6