There are lots of Arduino tutorials that make it much harder than it has to be. There are many difficult and complicated ways you can read data over the serial port, but luckily there is an easy way. While we touched on this briefly in earlier videos, it is such an important topic I want to focus on it in this lesson. Almost all possible needs can be covered by three simple data types.
Connect the sensor Connect your analog sensor to analog pin 0 like you did in the analog lab. IR distance rangers are fun for this exercise, for example. Force-sensing resistors are good as well. Schematic view of a potentiometer connected to analog in 0 of the Arduino Breadboard view of a potentiometer connected to analog in 0 of an Arduino Read the Sensor Value and Send the Data Serially Program the Arduino module to read the analog sensor and print the results to the Serial monitor.
Instead of using the Serial. This will send the sensor value as a raw binary value rather than as a string: Why divide the sensor value by 4? Dividing the sensor value by 4 reduces the range to 0 tothe range that can fit in a single byte.
When you open the Serial Monitor, you will see garbage characters. It sends out the binary value of the sensor reading.
For more background on this, see the notes on variables. The Arduino IDE with the serial monitor open. The screen is showing garbage. If the reading isthen Serial.
Sending data using Serial. However, there are other ways to see the serial data. Download it and install it, and open the Options tab. From there, pick your serial port in the menu, then close the Options tab. Then click the Connect button to open the serial port. Once you have data coming into CoolTerm, click the Hex button.
Remember, the microcontroller is just sending a series of electrical pulses. How those pulses are interpreted is up to the program that reads them. Any bytes you type in the window will be sent out the serial port you opened.
Any bytes received in the serial port will be displayed in the window. Click the Disconnect button to close the serial port. Read the Data in Processing Related video: Processing is an excellent tool for reading serial data because you can program it to interpret the data any way you want.For a project I'm working on, I had the need to send some float variables computed on the Arduino board to a Processing program running on a computer over a Serial communication Link.
Want to learn how to use the Arduino + Arduino Ethernet shield as a HTTP web server? There are many technologies that must come together to be able to make the Arduino able to host web pages.
The most basic Continue reading →. Serial. write() Description. Writes binary data to the serial port. This data is sent as a byte or series of bytes; to send the characters representing the digits of a number use the print() function instead..
Syntax. Serial. println() Description. Prints data to the serial port as human-readable ASCII text followed by a carriage return character (ASCII 13, . Download Teensyduino, Version Teensyduino is a software add-on for the Arduino software.
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