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#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <DNSServer.h>
#include <Ticker.h>
#include <Wire.h>
#include "mqtt.h"
#include "config.h"
#include "logging.h"
#include "http_server.h"
#include "led.h"
#include "config.def.h"
#include "wifi.h"
#include "temphum.h"
#include "stopwatch.h"
using namespace homekit;
enum class WorkingMode {
RECOVERY, // AP mode, http server with configuration
NORMAL, // MQTT client
};
static enum WorkingMode working_mode = WorkingMode::NORMAL;
enum class WiFiConnectionState {
WAITING = 0,
JUST_CONNECTED = 1,
CONNECTED = 2
};
static const uint16_t recovery_boot_detection_ms = 2000;
static const uint8_t recovery_boot_delay_ms = 100;
static volatile enum WiFiConnectionState wifi_state = WiFiConnectionState::WAITING;
static void* service = nullptr;
static WiFiEventHandler wifiConnectHandler, wifiDisconnectHandler;
static Ticker wifiTimer;
#if MQTT_BLINK
static StopWatch blinkStopWatch;
#endif
static DNSServer* dnsServer = nullptr;
static void onWifiConnected(const WiFiEventStationModeGotIP& event);
static void onWifiDisconnected(const WiFiEventStationModeDisconnected& event);
static void wifiConnect() {
const char *ssid, *psk, *hostname;
auto cfg = config::read();
wifi::getConfig(cfg, &ssid, &psk, &hostname);
PRINTF("Wi-Fi STA creds: ssid=%s, psk=%s, hostname=%s\n", ssid, psk, hostname);
wifi_state = WiFiConnectionState::WAITING;
WiFi.mode(WIFI_STA);
WiFi.hostname(hostname);
WiFi.begin(ssid, psk);
PRINT("connecting to wifi..");
}
static void wifiHotspot() {
esp_led.on();
auto scanResults = wifi::scan();
WiFi.mode(WIFI_AP);
WiFi.softAP(wifi::AP_SSID);
dnsServer = new DNSServer();
dnsServer->start(53, "*", WiFi.softAPIP());
service = new HttpServer(scanResults);
((HttpServer*)service)->start();
}
static void waitForRecoveryPress() {
pinMode(FLASH_BUTTON_PIN, INPUT_PULLUP);
for (uint16_t i = 0; i < recovery_boot_detection_ms; i += recovery_boot_delay_ms) {
delay(recovery_boot_delay_ms);
if (digitalRead(FLASH_BUTTON_PIN) == LOW) {
working_mode = WorkingMode::RECOVERY;
break;
}
}
}
void setup() {
WiFi.disconnect();
waitForRecoveryPress();
temphum::setup();
#ifdef DEBUG
Serial.begin(115200);
#endif
auto cfg = config::read();
if (config::isDirty(cfg)) {
PRINTLN("config is dirty, erasing...");
config::erase(cfg);
board_led.blink(10, 50);
}
switch (working_mode) {
case WorkingMode::RECOVERY:
wifiHotspot();
break;
case WorkingMode::NORMAL:
wifiConnectHandler = WiFi.onStationModeGotIP(onWifiConnected);
wifiDisconnectHandler = WiFi.onStationModeDisconnected(onWifiDisconnected);
wifiConnect();
break;
}
}
void loop() {
if (working_mode == WorkingMode::NORMAL) {
if (wifi_state == WiFiConnectionState::WAITING) {
PRINT(".");
esp_led.blink(2, 50);
delay(1000);
return;
}
if (wifi_state == WiFiConnectionState::JUST_CONNECTED) {
board_led.blink(3, 300);
wifi_state = WiFiConnectionState::CONNECTED;
if (service == nullptr)
service = new mqtt::MQTT();
((mqtt::MQTT*)service)->connect();
#if MQTT_BLINK
blinkStopWatch.save();
#endif
}
auto mqtt = (mqtt::MQTT*)service;
if (static_cast<int>(wifi_state) >= 1 && mqtt != nullptr) {
mqtt->loop();
if (mqtt->ota.readyToRestart) {
mqtt->disconnect();
} else if (mqtt->diagnosticsStopWatch.elapsed(10000)) {
mqtt->sendDiagnostics();
auto data = temphum::read();
mqtt->sendTempHumData(data.temp, data.rh);
}
#if MQTT_BLINK
// periodically blink board led
if (blinkStopWatch.elapsed(5000)) {
board_led.blink(1, 10);
blinkStopWatch.save();
}
#endif
}
} else {
if (dnsServer != nullptr)
dnsServer->processNextRequest();
auto httpServer = (HttpServer*)service;
if (httpServer != nullptr)
httpServer->loop();
}
}
static void onWifiConnected(const WiFiEventStationModeGotIP& event) {
PRINTF("connected (%s)\n", WiFi.localIP().toString().c_str());
wifi_state = WiFiConnectionState::JUST_CONNECTED;
}
static void onWifiDisconnected(const WiFiEventStationModeDisconnected& event) {
PRINTLN("disconnected from wi-fi");
wifi_state = WiFiConnectionState::WAITING;
if (service != nullptr)
((mqtt::MQTT*)service)->disconnect();
wifiTimer.once(2, wifiConnect);
}
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