InteractiveServer_Mesh_Headless.ino

This example demonstrates "headless' use of a server, without a gateway device like Raspberry Pi/Linux.

/*
 * RF24Ethernet InteractiveServer example by TMRh20
 * - Webserver controlling an LED example
 *
 * RF24Ethernet uses the uIP stack by Adam Dunkels <adam@sics.se>
 *
 * This example demonstrates how to configure a Headless Master node running an HTTP server
 * It does NOT require a Gateway node, just two nodes running RF24Ethernet
 *
 */
 
#define OUTPUT_BUFFER_SIZE MAX_PAYLOAD_SIZE - 14
 
 
 
//*********************** USER CONFIG ***********************
// Comment this out to use the nrf_to_nrf driver for nRF52 radios
#define USE_NRF24
//**********************************************************
 
#ifdef USE_NRF24
#include <RF24.h>
#include <RF24Network.h>
#include "RF24Mesh.h"
#include <RF24Ethernet.h>
#include "HTML.h"
 
RF24 radio(7, 8);
RF24Network network(radio);
RF24Mesh mesh(radio, network);
RF24EthernetClass RF24Ethernet(radio, network, mesh);
#else
#include <nrf_to_nrf.h>
#include <RF24Network.h>
#include "RF24Mesh.h"
#include <RF24Ethernet.h>
#include "HTML.h"
nrf_to_nrf radio;
RF52Network network(radio);
RF52Mesh mesh(radio, network);
RF52EthernetClass RF24Ethernet(radio, network, mesh);
#endif
 
#if defined(ARDUINO_ARCH_ESP8266)
#define LED_PIN BUILTIN_LED
#else
#define LED_PIN A3  //Analog pin A3
#endif
 
// Configure the server to listen on port 1000
EthernetServer server = EthernetServer(80);
 
/**********************************************************/
static unsigned short generate_tcp_stats();
 
void setup() {
 
  Serial.begin(115200);
  while (!Serial) {}
  //printf_begin();
  Serial.println("start");
  pinMode(LED_PIN, OUTPUT);
 
  IPAddress myIP(10, 1, 3, 1);
  Ethernet.begin(myIP);
 
  //Set IP of the RPi (gateway)
  IPAddress gwIP(10, 1, 3, 2);
  Ethernet.set_gateway(gwIP);
 
  // Make this a Master node
  mesh.setNodeID(0);
  Serial.println(mesh.getNodeID());
  mesh.begin(65);
 
  server.begin();
  server.setTimeout(30000);
}
 
/********************************************************/
 
uint32_t mesh_timer = 0;
 
void loop() {
 
  mesh.DHCP();
 
  size_t size;
 
  if (EthernetClient client = server.available()) {
    uint8_t pageReq = 0;
    generate_tcp_stats();
    while ((size = client.available()) > 0) {
      // If a request is received with enough characters, search for the / character
      if (size >= 7) {
        char slash[] = { "/" };
        client.setTimeout(10000);
        client.findUntil(slash, slash);
        char buf[3] = { "  " };
        if (client.available() >= 2) {
          buf[0] = client.read();  // Read in the first two characters from the request
          buf[1] = client.read();
 
          if (strcmp(buf, "ON") == 0) {  // If the user requested http://ip-of-node:1000/ON
            led_state = 1;
            pageReq = 1;
            digitalWrite(LED_PIN, led_state);
          } else if (strcmp(buf, "OF") == 0) {  // If the user requested http://ip-of-node:1000/OF
            led_state = 0;
            pageReq = 1;
            digitalWrite(LED_PIN, led_state);
          } else if (strcmp(buf, "ST") == 0) {  // If the user requested http://ip-of-node:1000/ST
            pageReq = 2;
          } else if (strcmp(buf, "CR") == 0) {  // If the user requested http://ip-of-node:1000/CR
            pageReq = 3;
          } else if (buf[0] == ' ') {
            pageReq = 4;
          }
        }
      }
      // Empty the rest of the data from the client
      client.flush();
    }
 
    /**
    * Based on the incoming URL request, send the correct page to the client
    * see HTML.h
    */
    switch (pageReq) {
      case 2:
        stats_page(client);
        break;
      case 3:
        credits_page(client);
        break;
      case 4:
        main_page(client);
        break;
      case 1:
        main_page(client);
        break;
      default:
        break;
    }
 
    client.stop();
    Serial.println(F("********"));
  }
 
  // We can do other things in the loop, but be aware that the loop will
  // briefly pause while IP data is being processed.
}
 
/**
* This section displays some basic connection stats via Serial and demonstrates
* how to interact directly with the uIP TCP/IP stack
* See the uIP documentation for more info
*/
static unsigned short generate_tcp_stats() {
  /*struct uip_conn* conn;
 
  // If multiple connections are enabled, get info for each active connection
  for (uint8_t i = 0; i < UIP_CONF_MAX_CONNECTIONS; i++) {
    conn = &uip_conns[i];
 
    // If the application state is active for an available connection, print the info
    if (conn->appstate) {
      Serial.print(F("Connection no "));
      Serial.println(i);
      Serial.print(F("Local Port "));
      Serial.println(htons(conn->lport));
      Serial.print(F("Remote IP/Port "));
      Serial.print(htons(conn->ripaddr[0]) >> 8);
      Serial.print(F("."));
      Serial.print(htons(conn->ripaddr[0]) & 0xff);
      Serial.print(F("."));
      Serial.print(htons(conn->ripaddr[1]) >> 8);
      Serial.print(F("."));
      Serial.print(htons(conn->ripaddr[1]) & 0xff);
      Serial.print(F(":"));
      Serial.println(htons(conn->rport));
      Serial.print(F("Outstanding "));
      Serial.println((uip_outstanding(conn)) ? '*' : ' ');
    }
  }*/
  return 1;
}