Mar 19, 2015 A user can enter data in the input field in the serial monitor window to send values and data to the Arduino. Any serial program, or even a custom serial application can be used to send data to the Arduino instead of using the Serial Monitor window. I'm trying figure out how to make the serial monitor printing specific content based on the user input. For instance if the user has typed '1' it should constantly print ('Hello') and when user has. The Arduino Reference text is licensed under a Creative Commons Attribution-Share Alike 3.0 License. Find anything that can be improved? Suggest corrections and new documentation via GitHub. Doubts on how to use Github? Learn everything you need to know in this tutorial. Serial monitor of Arduino is a very useful feature.Serial monitor is used to see receive data, send data,print data and so on.Serial monitor is connected to the Arduino through serial communication. This serial communication occurs using RX (pin 0) and TX (pin 1) terminal of Arduino. Any kind of data can send through this serial monitor. Thus, if you use these functions, you cannot also use pins 0 and 1 for digital input or output. You can use the Arduino environment's built-in serial monitor to communicate with an Arduino board. Click the serial monitor button in the toolbar and select the same baud rate used in the call to begin.
These Arduino projects are designed to display the value of inputs using the serialmonitor. Serial is a method of communication between a peripheral and a computer. In this case, it is serial communication over Universal Serial Bus (USB). When reading sensors with an Arduino, the values are sent over this connection and can be monitored or interpreted on your computer.
The DigitalReadSerial Sketch
In the DigitalReadSerial project you monitor the HIGH and LOW values of a button over the serial monitor.
Arduino basic tutorial 'analogRead' Serial Monitor with Potentiometer. Reads an analog input on pin A0, prints the result to the serial monitor. Connections Attach the center pin of a.
For this project, you need:
- An Arduino Uno
- A breadboard
- A 10k ohm resistor
- A pushbutton
- Jump wires
Complete the circuit and upload the code from File→Examples→01.Basics→DigitalReadSerial.
After you upload the sketch, click the serial monitor button on the top right of the Arduino window. Clicking this button opens the serial monitor window and displays any values being sent to the currently selected serial port.
In the window, you should see a cascade of 0 values. Press the button a few times, and you should see some 1 values appear.
If you don’t see anything, or you see incorrect values, double-check your wiring:
- Make sure that you’re using the correct pin number for your button.
- If the jump wires or components are not connected using the correct rows in the breadboard, they will not work.
- If you are receiving strange characters instead of 0s and 1s, check the baud rate in the serial monitor; if it is not set to 9600, use the drop-down menu to select that rate.
The AnalogInOutSerial Sketch
In this project, you monitor an analog value sent by a variable resistor over the serial monitor. These variable resistors are the same as the volume control knobs on your stereo.
In this example, you monitor the value as detected by your Arduino and display it on your screen in the serial monitor, giving you a greater understanding of the range of values and performance of this analog sensor.
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Serial Input Arduino Download
You need:
- An Arduino Uno
- A breadboard
- A 10k ohm variable resistor
- A resistor (greater than 120 ohm)
- An LED
- Jump wiresDriver license photo size. Your picture in a UK biometric passport has to meet very exact standards in order for it to be valid for use, and current requirements are based around the biometric passport standards now in use around the world.
The circuit uses an LED connected to pin 9 as in the Fade circuit. The code fades the LED on and off according to the turn of the potentiometer.
Because the input and the output have a different range of values, the sketch needs to include a conversion to use the potentiometer to fade the LED. This is a great example of using the serial monitor for debugging and displays both the input and output values for maximum clarity.
Complete the circuit and upload the code from File→Examples→03.Analog→AnalogInOutSerial.
After you upload the sketch, turn the potentiometer with your fingers. The result should be an LED that fades on and off depending on the value of the potentiometer. Now click the serial monitor button on the top right of the Arduino window to monitor the same values that you are receiving and sending to the LED.
If you don’t see anything happening, double-check your wiring:
- Make sure that you’re using the correct pin number for your variable resistor.
- Check that your LED is the correct way round, with the long leg connected to Pin 9 and the short leg in GND, via a resistor.
- If the jump wires or components are not connected using the correct rows in the breadboard, they will not work.
- If you are receiving strange characters instead of words and numbers, check the baud rate in the serial monitor. If it is not set to 9600, use the drop-down menu to select that rate.
Description
Used for communication between the Arduino board and a computer or other devices. All Arduino boards have at least one serial port (also known as a UART or USART), and some have several.
Board | USB CDC name | Serial pins | Serial1 pins | Serial2 pins | Serial3 pins |
---|---|---|---|---|---|
Uno, Nano, Mini | 0(RX), 1(TX) | ||||
Mega | 0(RX), 1(TX) | 19(RX), 18(TX) | 17(RX), 16(TX) | 15(RX), 14(TX) | |
Leonardo, Micro, Yún | Serial | 0(RX), 1(TX) | |||
Uno WiFi Rev.2 | Connected to USB | 0(RX), 1(TX) | Connected to NINA | ||
MKR boards | Serial | 13(RX), 14(TX) | |||
Zero | SerialUSB (Native USB Port only) | Connected to Programming Port | 0(RX), 1(TX) | ||
Due | SerialUSB (Native USB Port only) | 0(RX), 1(TX) | 19(RX), 18(TX) | 17(RX), 16(TX) | 15(RX), 14(TX) |
101 | Serial | 0(RX), 1(TX) |
On Uno, Nano, Mini, and Mega, pins 0 and 1 are used for communication with the computer. Connecting anything to these pins can interfere with that communication, including causing failed uploads to the board.
You can use the Arduino environment’s built-in serial monitor to communicate with an Arduino board. Click the serial monitor button in the toolbar and select the same baud rate used in the call to
begin()
.Serial communication on pins TX/RX uses TTL logic levels (5V or 3.3V depending on the board). Don’t connect these pins directly to an RS232 serial port; they operate at +/- 12V and can damage your Arduino board.
Serial.read Arduino Number
To use these extra serial ports to communicate with your personal computer, you will need an additional USB-to-serial adaptor, as they are not connected to the Mega’s USB-to-serial adaptor. To use them to communicate with an external TTL serial device, connect the TX pin to your device’s RX pin, the RX to your device’s TX pin, and the ground of your Mega to your device’s ground.