Farm-Data-Relay-System/FDRS_Sensor2000/fdrs_sensor.h

//  FARM DATA RELAY SYSTEM
//
//  "fdrs_sensor.h"
//
//  Developed by Timm Bogner (bogner1@gmail.com) for Sola Gratia Farm in Urbana, Illinois, USA.
//

#include "fdrs_config.h"
#include "DataReading.h"

#if defined(ESP8266)
#include <ESP8266WiFi.h>
#include <espnow.h>
#elif defined(ESP32)
#include <esp_now.h>
#include <WiFi.h>
#include <esp_wifi.h>
#endif
#include <LoRa.h>

const uint16_t espnow_size = 250 / sizeof(DataReading);
uint8_t gatewayAddress[] = {MAC_PREFIX, GTWY_MAC};
uint8_t gtwyAddress[] = {gatewayAddress[3], gatewayAddress[4], GTWY_MAC};
uint8_t LoRaAddress[] = {0x42, 0x00};


uint32_t wait_time = 0;

  DataReading fdrsData[espnow_size];
  uint8_t data_count = 0;

void beginFDRS() {


#ifdef USE_ESPNOW
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  // Init ESP-NOW for either ESP8266 or ESP32 and set MAC address
#if defined(ESP8266)
  if (esp_now_init() != 0) {
    return;
  }
  esp_now_set_self_role(ESP_NOW_ROLE_COMBO);
  // Register peers
  esp_now_add_peer(gatewayAddress, ESP_NOW_ROLE_COMBO, 0, NULL, 0);
#elif defined(ESP32)
  if (esp_now_init() != ESP_OK) {
    Serial.println("Error initializing ESP-NOW");
    return;
  }
  esp_now_peer_info_t peerInfo;
  peerInfo.ifidx = WIFI_IF_STA;
  peerInfo.channel = 0;
  peerInfo.encrypt = false;
  // Register first peer
  memcpy(peerInfo.peer_addr, gatewayAddress, 6);
  if (esp_now_add_peer(&peerInfo) != ESP_OK) {
    Serial.println("Failed to add peer");
    return;
  }
#endif
#endif
#ifdef USE_LORA
  SPI.begin(SCK, MISO, MOSI, SS);
  LoRa.setPins(SS, RST, DIO0);
  if (!LoRa.begin(BAND)) {
    while (1);
  }
#endif
}
#ifdef USE_LORA
void transmitLoRa(uint8_t* mac, DataReading * packet, uint8_t len) {
  uint8_t pkt[5 + (len * sizeof(DataReading))];
  memcpy(&pkt, mac, 3);
  memcpy(&pkt[3], &LoRaAddress, 2);
  memcpy(&pkt[5], packet, len * sizeof(DataReading));
  LoRa.beginPacket();
  LoRa.write((uint8_t*)&pkt, sizeof(pkt));
  LoRa.endPacket();
}
#endif
void sendFDRS() {
#ifdef USE_ESPNOW
  esp_now_send(gatewayAddress, (uint8_t *) &fdrsData, data_count * sizeof(DataReading));
#endif
#ifdef USE_LORA
  transmitLoRa(gtwyAddress, fdrsData, data_count);
#endif
  data_count = 0;
}
void loadFDRS(float d, uint8_t t) {
  if (data_count > espnow_size) sendFDRS();
  DataReading dr;
  dr.id = READING_ID;
  dr.t = t;
  dr.d = d;
  fdrsData[data_count] = dr;
  data_count++;

}