For floating point numbers, this parameter specifies the number of decimal places to use. Serial.print(78) gives "78" Serial.print(1.23456) gives "1.23" Serial.print('N') gives "N" Serial.print("Hello world.") gives "Hello world." An optional second parameter specifies the base (format) to use permitted values are BIN (binary, or base 2), OCT (octal, or base 8), DEC (decimal, or base 10), HEX (hexadecimal, or base 16). Floats are similarly printed as ASCII digits, defaulting to two decimal places.
Numbers are printed using an ASCII character for each digit. Prints data to the serial port as human-readable ASCII text. Serial.begin(9600) // opens serial port, sets data rate to 9600 bps Speed: in bits per second (baud) - long config: sets data, parity, and stop bits. Serial.begin(speed) Serial.begin(speed, config)Īrduino Mega only: Serial1.begin(speed) Serial2.begin(speed) Serial3.begin(speed) Serial1.begin(speed, config) Serial2.begin(speed, config) Serial3.begin(speed, config) The default is 8 data bits, no parity, one stop bit. You can, however, specify other rates - for example, to communicate over pins 0 and 1 with a component that requires a particular baud rate.Īn optional second argument configures the data, parity, and stop bits. Sets the data rate in bits per second (baud) for serial data transmission. 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. To use these pins 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. The Arduino Mega has three additional serial ports: Serial1 on pins 19 (RX) and 18 (TX), Serial2 on pins 17 (RX) and 16 (TX), Serial3 on pins 15 (RX) and 14 (TX). Click the serial monitor button in the toolbar and select the same baud rate used in the call to begin(). You can use the Arduino environment's built-in serial monitor to communicate with an Arduino board. Thus, if you use these functions, you cannot also use pins 0 and 1 for digital input or output. It communicates on digital pins 0 (RX) and 1 (TX) as well as with the computer via USB. All Arduino boards have at least one serial port (also known as a UART or USART): Serial. Serial is used for communication between the Arduino board and a computer or other devices. Don't connect these pins directly to an RS232 serial port they operate at +/- 12V and can damage your Arduino board. It seems the SendSerialData(), which is a function with around 15 serial.print's, is effecting the timings as without it the frequency is as expected.ĭoes anyone know of any solutions? Data logging and plotting to a graph in real time is essential and cannot be compromised.Serial communication on pins TX/RX uses TTL logic levels (5V or 3.3V depending on the board). Obviously we could compensate to achieve a single frequency however we need to be able to use a range frequencies reliably. With millis() we are unable to produce the same frequency. However this of course compromised the plotting of the graphs as there was gaps in the data. Which gave us reliable frequencies when measure on an oscilloscope. Initially we were controlling the frequency of the pump using delays. Loop this until the pumpLOW duration has expired While (millis() - PumpCycleTime < PumpHIGH) Loop this until the pumpHIGH duration has expired
#Arduino serial print code
We have a section of code that is time critical PumpCycleTime = millis() The problem we are having lies with the Due.
#Arduino serial print software
We are using an Arduino Due to send serial data via usb to a piece of software produced in visual studio.