wifi_service.cpp

#include "wifi_service.h"

#include <ESP8266WiFi.h>

#include "config.h"

namespace {

void enable_dhcp_mode() {
  IPAddress empty_ip(0U, 0U, 0U, 0U);
  WiFi.config(empty_ip, empty_ip, empty_ip);
}

}

void connect_wifi(ESP8266WiFiMulti *wifi_multi, uint32_t timeout_ms,
                  String *wifi_connected) {
  WiFi.mode(WIFI_STA);

#if USE_STATIC_IP
  IPAddress local_ip;
  IPAddress gateway;
  IPAddress subnet;
  IPAddress dns1;
  IPAddress dns2;

  bool has_dns2 = STATIC_IP_DNS2[0] != '\0';

  bool static_ip_valid =
      local_ip.fromString(STATIC_IP_ADDRESS) &&
      gateway.fromString(STATIC_IP_GATEWAY) &&
      subnet.fromString(STATIC_IP_SUBNET) &&
      dns1.fromString(STATIC_IP_DNS1) &&
      (!has_dns2 || dns2.fromString(STATIC_IP_DNS2));

  if (!static_ip_valid) {
    Serial.println("Invalid static IP config; fallback to DHCP.");
    enable_dhcp_mode();
  } else if (!(has_dns2
                   ? WiFi.config(local_ip, gateway, subnet, dns1, dns2)
                   : WiFi.config(local_ip, gateway, subnet, dns1))) {
    Serial.println("Failed to apply static IP; fallback to DHCP.");
    enable_dhcp_mode();
  } else {
    Serial.print("Using static IP: ");
    Serial.println(local_ip);
  }
#else
  enable_dhcp_mode();
#endif

  wifi_multi->addAP(WIFI1_SSID, WIFI1_PASSWD);
  wifi_multi->addAP(WIFI2_SSID, WIFI2_PASSWD);
  wifi_multi->addAP(WIFI3_SSID, WIFI3_PASSWD);

  if (wifi_multi->run(timeout_ms) == WL_CONNECTED) {
    Serial.print("WiFi connected: ");
    Serial.print(WiFi.SSID());
    Serial.print(" ");
    Serial.println(WiFi.localIP());
    *wifi_connected = WiFi.SSID();
  } else {
    Serial.println("WiFi not connected!");
  }
}