Arduino sketch for Arduino NANO to send data to NodeMCU using SoftwareSerial library

Arduino_NANO_transmit_to_NodeMCU.ino

#include <SoftwareSerial.h>
#include <SimpleDHT.h>

SoftwareSerial softSerial(2, 3); // (RX, TX)
SimpleDHT11 dht11(5);

void setup() {
  softSerial.begin(9600);

}

void loop() {
  byte temperature = 0;
  byte humidity = 0;
  
  int err = SimpleDHTErrSuccess;
  if ((err = dht11.read(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) {
    return;
  }

  String data = String(temperature) + "," + String(humidity);

  softSerial.println(data);

  delay(5000);

}