/*

  Forum: https://forum.arduino.cc/t/esp32-esp-now-with-auto-pairing-loop-through-peer-list-help/1199296
  Wokwi:https://wokwi.com/projects/383917653106828289

  The following declarations and functions handle a mac address list

*/

#include "dummyESPFunctions.h"

constexpr int maxPeers {20};
uint8_t totalPeerList[maxPeers][6];
int noOfPeersInList = 0;
esp_now_peer_info_t slave;

void setup() {
  Serial.begin(115200);
  populateList();
  printList();
}

void loop() {
}

void populateList() {
  boolean from_head = true;
  int count = 0;
  while (esp_now_fetch_peer(from_head, &slave) == ESP_OK) {
    from_head = false;
    memcpy(totalPeerList[count],slave.peer_addr,6);
    count++;
  }
  noOfPeersInList = count;
}

void printList() {
  for (int i = 0; i<noOfPeersInList;i++){
   Serial.printf("MAC ADRESS %2d: ",i+1);    
   printMAC(totalPeerList[i]);
   Serial.println();
  }
}


// ---------------------------- esp_ now -------------------------
void printMAC(const uint8_t * mac_addr){
  char macStr[18];
  snprintf(macStr, sizeof(macStr), "%02x:%02x:%02x:%02x:%02x:%02x",
           mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], mac_addr[4], mac_addr[5]);
  for (int i=0;i<18;i++){
    macStr[i] = toupper(macStr[i]);
  }
  Serial.print(macStr);
}