void addPeer(uint8_t *mac_addr) {
  esp_now_peer_info_t peerInfo;
  memset(&peerInfo, 0, sizeof(peerInfo));
  memcpy(peerInfo.peer_addr, mac_addr, 6);
  peerInfo.channel = 0;
  peerInfo.encrypt = false;

  if (esp_now_add_peer(&peerInfo) != ESP_OK) {
    Serial.println("ELC1344");
  }
}

void removePeer(uint8_t *mac_addr) {
  if (esp_now_del_peer(mac_addr) != ESP_OK) {
    Serial.println("ELC1343");
  }
}

void SendMessageToPeer(const String payload, uint8_t *castAddr)
{
	esp_err_t result = esp_now_send(castAddr, (uint8_t*)payload.c_str(), payload.length());
  // send_data = payload;
}

void AutoSendMessageToPeer(const String payload, uint8_t *castAddr) {
  addPeer(castAddr);
  SendMessageToPeer(payload, castAddr);
  removePeer(castAddr);
}