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Improve WiFi connection resilience and skip MQTT when offline #44

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Improve WiFi connection resilience and skip MQTT when offline #44

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Improve WiFi connection resilience and skip MQTT when offline
totolouis Apr 15, 2026
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totolouis Apr 16, 2026
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40 changes: 40 additions & 0 deletions src/main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -180,6 +180,46 @@ void loop() {
LOG.handle(); // telnetspy handling
ArduinoOTA.handle();

#if WIFI_ENABLED
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@nmaupu nmaupu May 4, 2026

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There is already a function to reconnectWifi which does exactly that declared in src/net/wifi.cpp (reconnectWifi).

// Escalating WiFi reconnection after beacon timeout disconnects
// Phase 1 (attempts 1-3): WiFi.reconnect() every 5s
// Phase 2 (attempts 4+): Full disconnect + begin cycle every 10s
{
static unsigned long lastWifiCheck = 0;
static uint8_t reconnectAttempts = 0;
unsigned long now = millis();
unsigned long interval = reconnectAttempts < 3 ? 5000 : 10000;

if (now - lastWifiCheck > interval) {
lastWifiCheck = now;
if (WiFi.status() != WL_CONNECTED) {
if (reconnectAttempts < UINT8_MAX) reconnectAttempts++;

if (reconnectAttempts <= 3) {
// Phase 1: soft reconnect
LOG.print("WiFi disconnected, reconnecting (attempt ");
LOG.print(reconnectAttempts);
LOG.println(")...");
WiFi.reconnect();
} else {
// Phase 2: full disconnect + begin cycle
LOG.print("WiFi reconnect failed, full reconnect (attempt ");
LOG.print(reconnectAttempts);
LOG.println(")...");
WiFi.disconnect(true);
delay(100);
WiFi.mode(WIFI_STA);
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@nmaupu nmaupu May 4, 2026

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Not sure about that. Mode is already set as per the initial configuration.

WiFi.begin();
}
} else if (reconnectAttempts > 0) {
LOG.print("WiFi reconnected to ");
LOG.println(WiFi.SSID());
reconnectAttempts = 0;
}
}
}
#endif // WIFI_ENABLED

#if MQTT_ENABLED
g_mqtt->loop();

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4 changes: 2 additions & 2 deletions src/net/mqtt.cpp
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Expand Up @@ -81,8 +81,8 @@ void Mqtt::clearSubscriptions() {

// force=false by default
bool Mqtt::reconnect(bool force) {
// No configuration available
if (this->MqttConfig::isEmpty()) {
// No configuration available or WiFi not connected
if (this->MqttConfig::isEmpty() || WiFi.status() != WL_CONNECTED) {
return false;
}

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