Code for remotecontrol

esp-now-sender.c

#include <ESP8266WiFi.h>
#include <espnow.h>

int a0 = 5;
int a1 = 4;
int a2 = 0;
int a3 = 2; 
int a4 = 10;
int a5 = 13;
int a6 = 12;
int a7 = 14;

// REPLACE WITH RECEIVER MAC Address
uint8_t broadcastAddress[] = {0x84, 0xF3, 0xEB, 0x80, 0xF2, 0x42};

// Structure example to send data
// Must match the receiver structure
typedef struct struct_message {
  int a0;
  int a1;
  int a2;
  int a3;
  int a4;
  int a5;
  int a6;
  int a7;
} struct_message;

// Create a struct_message called myData
struct_message myData;

unsigned long lastTime = 0;  
unsigned long timerDelay = 200;  // send readings timer

// Callback when data is sent
void OnDataSent(uint8_t *mac_addr, uint8_t sendStatus) {
  Serial.print("Last Packet Send Status: ");
  if (sendStatus == 0){
    Serial.println("Delivery success");
  }
  else{
    Serial.println("Delivery fail");
  }
}
 
void setup() {
  // Init Serial Monitor
  Serial.begin(115200);

  pinMode(a0, INPUT);     
  pinMode(a1, INPUT);     
  pinMode(a2, INPUT);     
  pinMode(a3, INPUT);     
  pinMode(a4, INPUT);     
  pinMode(a5, INPUT);     
  pinMode(a6, INPUT);     
  pinMode(a7, INPUT);     

  // Set device as a Wi-Fi Station
  WiFi.mode(WIFI_STA);

  // Init ESP-NOW
  if (esp_now_init() != 0) {
    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_set_self_role(ESP_NOW_ROLE_CONTROLLER);
  esp_now_register_send_cb(OnDataSent);
  
  // Register peer
  esp_now_add_peer(broadcastAddress, ESP_NOW_ROLE_SLAVE, 1, NULL, 0);
}
 
void loop() {
  if ((millis() - lastTime) > timerDelay) {
    // Set values to send
    myData.a0 = digitalRead(a0);
    myData.a1 = digitalRead(a1);
    myData.a2 = digitalRead(a2);
    myData.a3 = digitalRead(a3);
    myData.a4 = digitalRead(a4);
    myData.a5 = digitalRead(a5);
    myData.a6 = digitalRead(a6);
    myData.a7 = digitalRead(a7);

    // Send message via ESP-NOW
    esp_now_send(broadcastAddress, (uint8_t *) &myData, sizeof(myData));

    lastTime = millis();
  }
}