Sending and receiving data

You can configure a microcontroller to communicate with an HC-12 module using software serial, as we have seen previously. However, make sure that the SET pin is not pulled to the ground when in normal operation.

Let’s consider a simple sketch that will output whatever the HC-12 module receives to the serial console of the computer to which the microcontroller is connected.

Exercise 10.1 – displaying whatever the HC-12 module receives

Follow these steps to read whatever the HC-12 module receives and print it out on the serial monitor on your computer:

1. Begin by importing SoftwareSerial:

   #include <SoftwareSerial.h>

2. Create an instance of SoftwareSerial called HC12. This takes two parameters, the first being the pin that TX is connected to, and the second being the pin that RX is connected to:

   SoftwareSerial HC12(10, 11);

3. Initialize the serial port on the microcontroller to a baud rate of 9600. Do the same for the software...