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Read serial data arduino1/17/2024 So, whether or not you use interrupts to access that data then becomes irrelevant. Check your Arduino IDE serial port for the exact location. You may also find yours there, or at an integer increment (ttyACM1, ttyACM2, etc.), or perhaps a different address completely. const byte numChars 32 char receivedChars numChars // an array to store. Make sure newline is enabled in serial monitor line endings. Enter up to six integer numbers separated by commas, like 11,22,33,44,55,66. In the case of Raspberry Pi, the serial port (on my Arduino) is located at /dev/ttyACM0. A demo code using the serial input basics receive with end marker and the strtok () function parse the string array to integers. Is this an RFID security system? A fish-tank feeder? A moon rocket? It might be, for example, that serial data is not the best way of solving this problem. These three simple lines read a single row of data from the serial port. Perhaps, like a lot of other low-level questions we have seen recently, if we moved away from what you think you need (handling serial interrupts) to what real-world problem you are trying to solve. Let me assume that the data are coming over the serial port as ASCII characters with a preamble data byte (say: 0x03) and a postamble data byte (',' comma 0x2C). So the loop function, by checking Serial.available () is effectively checking if a "message" (serial data) is available, at a time when it can be processed in an orderly way. Even in advanced operating systems like Windows or OS/X, low-level hardware interrupts actually only usually put things into a queue (a message queue) which are pulled out in an orderly way by the application - the main application loop. You could regard the loop function as a message-despatcher. But what if this interrupt occurs while you are in the middle of doing something else (like opening the door)? Im having a really hard time taking the information from the serial.read function and turning it into something that I can use to dim an LED. In what way is it better? Let's say when an interrupt occurs you take some sort of action (like, closing a door). But having a function called automatically no matter where your code is in it's execution is a better way to go.
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