![]() The SoftwareSerial library is included in Arduino IDE Versions 1.0 and above, and you don’t need to install it separately. This is a very barebones version of my code to address this one issue. I plan to rotate between all 4 (starting with 2): Open port, write, read response, close port, move on. Make sure that your Arduino board is attached to your computer via USB to enable serial communication through the serial monitor window of the Arduino Software (IDE). If you are using multiple SoftwareSerial ports, only one can receive data at a time Speeds can be up to a maximum of 115200 bps Other limitations of this library, specific to some Arduino boards, can be found here. In this project I will be using multiple ESP8266 WiFi modules (4) connected by software serial to an Arduino Leonardo Micro (1 UART). After that, it does the same on the second virtual port (portTwo). The board listens on one virtual port (portOne) until it has read all available data. In the example below, digital pins 8 and 10 on your Arduino board are used as virtual RX serial lines. ![]() ![]() This can be extremely helpful when the need arises to communicate with two serial enabled devices, or to talk with just one device while leaving the main serial port open for debugging purpose. The SoftwareSerial library allows serial communication on other digital pins of an Arduino board, using software to replicate the functionality (hence the name 'SoftwareSerial'). Arduino boards have built in support for serial communication on pins 0 and 1, but what if you need more serial ports? The SoftwareSerial Library has been developed to allow serial communication to take place on the other digital pins of your boards, using software to replicate the functionality of the hardwired RX and TX lines. ![]()
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