README.md

Hardware Serial Console

This example is similiar to Hello World example except this time we are connecting trough RS232 serial port using TTL RS232 conventer:

You can connect it to your PC with USB to RS232 conventer or with ordinary serial cable if you have serial port on your PC.

Usage if pretty much the same as with Serial1. Here is echo example:

esp32-examples/examples/Hardware Serial Console/sketch/sketch.ino

Lines 1 to 16 in c9c8a3b

	#define RXD2 16
	#define TXD2 17
	void setup() {
	// Setup Serial2 on GPIO pins
	Serial2.begin(9600, SERIAL_8N1, RXD2, TXD2);
	}
	void loop() {
	// Check if there is data comming
	if (Serial2.available()) {
	// Read string until newline character
	String str = Serial2.readStringUntil('\n');
	Serial2.println("String: " + str);
	}
	}

Fritzing parts

• RS232-to-TTL-Converter

Sources

• ESP32 RS232
• Second Serial Port on ESP32 WROOM module - robrs