106 lines
2.6 KiB
C++
106 lines
2.6 KiB
C++
#include <ESP8266WiFi.h>
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#include <espMqttClient.h>
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#define WIFI_SSID "yourSSID"
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#define WIFI_PASSWORD "yourpass"
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#define MQTT_HOST IPAddress(192, 168, 1, 10)
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#define MQTT_PORT 1883
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WiFiEventHandler wifiConnectHandler;
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WiFiEventHandler wifiDisconnectHandler;
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espMqttClient mqttClient;
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bool reconnectMqtt = false;
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uint32_t lastReconnect = 0;
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size_t fetchPayload(uint8_t* dest, size_t len, size_t index) {
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Serial.printf("filling buffer at index %zu\n", index);
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// fill the buffer with random bytes
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// but maybe don't fill the entire buffer
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size_t i = 0;
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for (; i < len; ++i) {
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dest[i] = random(0xFF);
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if (dest[i] > 0xFC) {
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++i; // extra increment to compensate 'break'
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break;
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}
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}
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return i;
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}
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void connectToWiFi() {
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Serial.println("Connecting to Wi-Fi...");
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WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
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}
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void connectToMqtt() {
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Serial.println("Connecting to MQTT...");
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if (!mqttClient.connect()) {
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reconnectMqtt = true;
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lastReconnect = millis();
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Serial.println("Connecting failed.");
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} else {
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reconnectMqtt = false;
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}
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}
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void onWiFiConnect(const WiFiEventStationModeGotIP& event) {
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(void) event;
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Serial.println("Connected to Wi-Fi.");
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connectToMqtt();
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}
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void onWiFiDisconnect(const WiFiEventStationModeDisconnected& event) {
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(void) event;
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Serial.println("Disconnected from Wi-Fi.");
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}
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void onMqttConnect(bool sessionPresent) {
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Serial.println("Connected to MQTT.");
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Serial.print("Session present: ");
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Serial.println(sessionPresent);
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mqttClient.publish("topic/largepayload", 1, false, fetchPayload, 6000);
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}
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void onMqttDisconnect(espMqttClientTypes::DisconnectReason reason) {
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Serial.printf("Disconnected from MQTT: %u.\n", static_cast<uint8_t>(reason));
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if (WiFi.isConnected()) {
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reconnectMqtt = true;
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lastReconnect = millis();
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}
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}
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void onMqttPublish(uint16_t packetId) {
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Serial.println("Publish acknowledged.");
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Serial.print(" packetId: ");
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Serial.println(packetId);
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}
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void setup() {
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Serial.begin(115200);
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Serial.println();
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Serial.println();
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WiFi.setAutoConnect(false);
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WiFi.setAutoReconnect(true);
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wifiConnectHandler = WiFi.onStationModeGotIP(onWiFiConnect);
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wifiDisconnectHandler = WiFi.onStationModeDisconnected(onWiFiDisconnect);
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mqttClient.onConnect(onMqttConnect);
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mqttClient.onDisconnect(onMqttDisconnect);
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mqttClient.onPublish(onMqttPublish);
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mqttClient.setServer(MQTT_HOST, MQTT_PORT);
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connectToWiFi();
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}
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void loop() {
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static uint32_t currentMillis = millis();
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mqttClient.loop();
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if (reconnectMqtt && currentMillis - lastReconnect > 5000) {
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connectToMqtt();
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}
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} |