Upload Code to Serial Monitor Withour Board Arduino

Arduino - Serial Monitor

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Serial Monitor is one of the tools in Arduino IDE. It is used for two purposes:

• Arduino → PC: Receives data from Arduino and display information on screen. This is usually used for debugging and monitoring

• PC → Arduino: Sends data (control) from PC to Arduino.

Information is exchanged betwixt Serial Monitor and Arduino via USB cable, which is too used to upload the code to Arduino. Therefore, To use Serial Monitor, nosotros MUST connect Arduino and PC via this cable.

Click the Serial Monitor icon

1. Output console: display data received from Arduino.

2. Autoscroll checkbox: choice to select between automatically curlicue and not curlicue.

3. Show timestamp checkbox: selection to show timestamp prior to data displayed on Series Monitor.

4. Articulate output push: clear all text on the output panel.

5. Baud rate selection: select communication speed (baud rate) between Arduino and PC. This value MUST be the same as the value used in Arduino code (in Serial.begin() office).

※ NOTE THAT:

When we select baud rate (even the value is not changed), Arduino is reset. Therefore, this is one style to reset Arduino.

1. Textbox: user can type characters to send to Arduino

2. Catastrophe selection: select the ending characters appended to data sent to Arduino. Selection includes:

• No line ending: suspend nothing

• Newline: suspend newline (LF, or '\due north') graphic symbol

• Carriage return: append carriage return (CR, or '\r') grapheme

• Both NL and CR: append both newline and carriage return (CRLF, or '\r\n') characters

3. Ship push: when the button is pressed, Series Monitor sends information in textbox plus the ending characters to Arduino

To send data from Arduino to PC, we need to use the following Arduino lawmaking:

• Fix baud rate and begin Serial port past using Serial.begin() function



Serial.println("Hello World!");

In this example, we will send the "ArduinoGetStarted.com" from Arduino to Serial Monitor every second



void setup() { Serial.begin(9600); } void loop() { Series.println("ArduinoGetStarted.com"); delay(1000); }

• Re-create the above code and open with Arduino IDE

• Click Upload button on Arduino IDE to upload code to Arduino

• Open Serial Monitor

• Select baurate 9600

• See the output on Series Monitor

ArduinoGetStarted.com ArduinoGetStarted.com ArduinoGetStarted.com ArduinoGetStarted.com

• Try irresolute Serial.println() office to Series.print() function

You volition type text on Serial Monitor and then click Ship push button.

Arduino reads data and process it. To read data, we demand to use the post-obit Arduino lawmaking:

• Prepare baud rate and begin Serial port

• Check whether data is available or not



if(Serial.bachelor()) { }



String information = Serial.readStringUntil("\r\n");

In this example, nosotros volition ship the commands from Serial Monitor to Arduino to turn on/off a built-in LED. The commands include:

• "ON": turn on LED

• "OFF": turn off LED

How Arduino tin receive a complete command? For example, when we ship "OFF" command, how Arduino tin can know the command is "O", "OF" or "OFF"?

⇒ When sending a control, we will suspend a newline character ('\n') by selecting "newline" pick on Series Monitor. Arduino will read data until it meets the newline grapheme. In this case, the newline character is called delimiter.



void setup() { Series.begin(9600); pinMode(LED_BUILTIN, OUTPUT); } void loop() { if(Series.available()) { Cord command = Serial.readStringUntil('\n'); if(command == "ON") { digitalWrite(LED_BUILTIN, HIGH); Serial.println("LED is turned ON"); } else if(command == "OFF") { digitalWrite(LED_BUILTIN, Depression); Serial.println("LED is turned OFF"); } } }

• Copy the above code and open up with Arduino IDE

• Click Upload button on Arduino IDE to upload code to Arduino

• Open Serial Monitor

• Select baurate 9600 and newline option

• Blazon "ON" or "OFF" and click Send button

• Run across the built-in LED'due south state on Arduino board. We will see LED's state is ON or OFF, respectively.

• We likewise come across LED's state on Serial Monitor

• Try typing "ON" or "OFF" command some times.

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Source: https://arduinogetstarted.com/tutorials/arduino-serial-monitor

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