Arduino Serial Read Text File Fixed

Arduino Serial Read Text File Fixed





             

Arduino Serial Read Text File


If you are trying to transfer a text file as a byte array from an arduino to a python script or vice versa without writing into a file then you can use Serial.readBytesUntil(). serial.readBytes() reads a fixed number of bytes.

The serial monitor should be turned on in the preferences so we know if there is any output. The code should be slowed down because if it is too fast the read bytes will be completed before all the bytes can be read. The serial monitor will appear to “freeze” during this process. In order to read all bytes in one shot, we will need to pause the serial port and then wait for the bytes to be complete and print them all, which can be done using readBytesUntil. This is what the code would look like:

//this opens the serial port with the baud rate of 19200 Serial.begin(19200); //this pauses the serial port until bytes are received Serial.pause(); //with this, we can read all bytes that are sent, the last one will end at 19200 while (Serial.available()) { buffer[0] = Serial.read(); //buffer here contains all bytes sent in the serial monitor //Serial.println(buffer); //this prints the buffer to the serial monitor } //you can print it to a file if you want Serial.println(buffer); //this closes the serial port Serial.end(); * With python, you will need to open the serial port, then setup the baud rate

//then open the serial port: import serial from time import sleep

#the baud rate is the speed the data goes through the wire ser = serial.Serial(‘/dev/ttyS2’,19200)

#wait for the process to finish before we print to file sleep(.5) #print to file print(ser.read(3000)) print(ser.read(3000)) #then close serial port ser.close()




If you are trying to transfer a text file as a byte array from an arduino to a python script or vice versa without writing into a file then you can use Serial.readBytesUntil(). serial.readBytes() reads a fixed number of bytes. The serial monitor should be turned on in the preferences so we know if there is any output. The code should be slowed down because if it is too fast the read bytes will be completed before all the bytes can be read. The serial monitor will appear to “freeze” during this process. In order to read all bytes in one shot, we will need to pause the serial port and then wait for the bytes to be complete and print them all, which can be done using readBytesUntil. This is what the code would look like: //this opens the serial port with the baud rate of 19200 Serial.begin(19200); //this pauses the serial port until bytes are received Serial.pause(); //with this, we can read all bytes that are sent, the last one will end at 19200 while (Serial.available()) { buffer[0] = Serial.read(); //buffer here contains all bytes sent in the serial monitor //Serial.println(buffer); //this prints the buffer to the serial monitor } //you can print it to a file if you want Serial.println(buffer); //this closes the serial port Serial.end(); * With python, you will need to open the serial port, then setup the baud rate //then open the serial port: import serial from time import sleep #the baud rate is the speed the data goes through the wire ser = serial.Serial(‘/dev/ttyS2’,19200) #wait for the process to finish before we print to file sleep(.5) #print to file print(ser.read(3000)) print(ser.read(3000)) #then close serial port ser.close() 5ec8ef588b


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