SunFounder ESP32 User Manual

SunFounder ESP32 Starter Kit
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IRrecv irrecv(IR_RECEIVE_PIN);
// Create a decode_results object
decode_results results;
2. In the setup() function, serial communication is started at a baud rate of 115200, and the IR receiver is enabled
using irrecv.enableIRIn().
void setup() {
// Start serial communication
Serial.begin(115200);
// Start the IR receiver
irrecv.enableIRIn();
}
3. When you press a key on the remote control, the serial monitor will print the key name if it is received by the IR
receiver.
void loop() {
// If an IR signal is received
if (irrecv.decode(&results)) {
String key = decodeKeyValue(results.value);
if (key != "ERROR") {
// Print the value of the signal to the serial monitor
Serial.println(key);
}
irrecv.resume(); // Continue to receive the next signal
}
}
• Firstly, check if an IR signal is received using the irrecv.decode() function.
• If a signal is received, then call the decodeKeyValue() function to decode the value of the
signal.
• If the signal is successfully decoded, the decoded value is printed to the serial monitor using
Serial.println().
• Finally, irrecv.resume() is called to continue to receive the next signal.
4. The decodeKeyValue() function takes the decoded value of the IR signal as an argument and returns a string
representing the key pressed on the remote control.
String decodeKeyValue(long result)
{
switch(result){
case 0xFF6897:
return "0";
case 0xFF30CF:
return "1";
case 0xFF18E7:
return "2";
case 0xFF7A85:
...
106 Chapter 1. For Arduino User

SunFounder ESP32 Specifications

General

Brand	SunFounder
Model	ESP32
Category	Controller
Language	English