Comunicacion Nodemcu ESP32 por WIFI (esp-now) hacia otra Nodemcu, y por RS485 al ordenador.

#include <Arduino.h>
#include <WiFi.h>
#include <esp_now.h>

uint8_t broadcastAddress[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
String estado;
String orden;
const int led=14;

// Structure example to send data
// Must match the receiver structure
typedef struct struct_message {
  String mensaje;
} struct_message;

// Create a struct_message called myData
struct_message myDataSen;

// Create a struct_message called myData
struct_message myDataRec;

esp_now_peer_info_t peerInfo;

// callback when data is sent
void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) {
  Serial.print("\r\nLast Packet Send Status:\t");
  Serial.println(status == ESP_NOW_SEND_SUCCESS ? "Delivery Success" : "Delivery Fail");
}
void OnDataRecv(const uint8_t * mac, const uint8_t *incomingData, int len) {
  memcpy(&myDataRec, incomingData, sizeof(myDataRec));
  orden=myDataRec.mensaje;
  if (orden=="encender"){
    digitalWrite(led, HIGH);
  } else if (orden=="apagar")
  {
    digitalWrite(led, LOW);
  }
  
}
 
void setup() {
  // Init Serial Monitor
  Serial.begin(9600);
 
  WiFi.mode(WIFI_STA);

  pinMode(led, OUTPUT);

  // Init ESP-NOW
  if (esp_now_init() != ESP_OK) {
    Serial.println("Error initializing ESP-NOW");
    return;
  }

  // Once ESPNow is successfully Init, we will register for Send CB to
  // get the status of Trasnmitted packet
  esp_now_register_send_cb(OnDataSent);
  
  // Once ESPNow is successfully Init, we will register for recv CB to
  // get recv packer info
  esp_now_register_recv_cb(OnDataRecv);

  // Register peer
  //Este apartado del peer es util para enviar el paquete
  memcpy(peerInfo.peer_addr, broadcastAddress, 6);
  peerInfo.channel = 0;  
  peerInfo.encrypt = false;
  
  // Add peer
  if (esp_now_add_peer(&peerInfo) != ESP_OK){
    Serial.println("Failed to add peer");
    return;
  }
}
void loop() {
  if(orden=="encender"){
    myDataSen.mensaje="led encendido";
    esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &myDataSen, sizeof(myDataSen)); 
    orden=Serial.read();
  }else if (orden=="apagar")
  {
    myDataSen.mensaje="led apagado";
    esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &myDataSen, sizeof(myDataSen));
    orden=Serial.read();
  }
}

#include <Arduino.h>
#include <SoftwareSerial.h>
#include <WiFi.h>
#include <esp_now.h>

SoftwareSerial mySerial(1, 3);
uint8_t broadcastAddress[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
String estado;

// Structure example to send data
// Must match the receiver structure
typedef struct struct_message {
  String mensaje;
} struct_message;

// Create a struct_message called myData
struct_message myDataSen;

// Create a struct_message called myData
struct_message myDataRec;

esp_now_peer_info_t peerInfo;

// callback when data is sent
void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) {
  Serial.print("\r\nLast Packet Send Status:\t");
  Serial.println(status == ESP_NOW_SEND_SUCCESS ? "Delivery Success" : "Delivery Fail");
}
void OnDataRecv(const uint8_t * mac, const uint8_t *incomingData, int len) {
  memcpy(&myDataRec, incomingData, sizeof(myDataRec));
  estado=myDataRec.mensaje;
}

void setup()
{
  mySerial.begin(9600);
  WiFi.mode(WIFI_STA);
  if (esp_now_init() != ESP_OK) {
    Serial.println("Error initializing ESP-NOW");
    return;
  }
// Once ESPNow is successfully Init, we will register for Send CB to
  // get the status of Trasnmitted packet
  esp_now_register_send_cb(OnDataSent);
  
  // Once ESPNow is successfully Init, we will register for recv CB to
  // get recv packer info
  esp_now_register_recv_cb(OnDataRecv);

  // Register peer
  //Este apartado del peer es util para enviar el paquete
  memcpy(peerInfo.peer_addr, broadcastAddress, 6);
  peerInfo.channel = 0;  
  peerInfo.encrypt = false;
  
  // Add peer
  if (esp_now_add_peer(&peerInfo) != ESP_OK){
    Serial.println("Failed to add peer");
    return;
  }
  pinMode(25, OUTPUT);
  pinMode(26, OUTPUT);
  delay(100);
}

void loop() // run over and over
{
  String receivedData = ""; 
  bool wordReceived = false;
  while (!wordReceived)
  {
    mySerial.flush();
    digitalWrite(25, LOW);
    digitalWrite(26, LOW);
    delay(100);
    if (mySerial.available())
    {
      String receivedString = mySerial.readString(); 
      receivedData = receivedString;
      receivedString=Serial.read();        
      receivedData.toLowerCase();
      if (receivedData=="apagar" || receivedData=="encender")
      {
        myDataSen.mensaje=receivedData;
        esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &myDataSen, sizeof(myDataSen));
        wordReceived = true;
      }
    }
    receivedData=Serial.read();
  }
  
  digitalWrite(25, HIGH);
  digitalWrite(26, HIGH);
  delay(100);
  mySerial.println(estado);
  estado=Serial.read();
  delay(100);
  
}

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;   Upload options: custom upload port, speed and extra flags
;   Library options: dependencies, extra library storages
;   Advanced options: extra scripting
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[env:esp32doit-devkit-v1]
platform = espressif32
board = esp32doit-devkit-v1
framework = arduino
lib_deps = https://github.com/plerup/espsoftwareserial.git