From 5450d21c34cf9035e89366d1ffa9a17db4a1b441 Mon Sep 17 00:00:00 2001
From: "Adrian A. Baumann" <ade@adebaumann.com>
Date: Sat, 27 Jun 2026 01:36:47 +0200
Subject: [PATCH] Shorten MQTT probe timeout to limit web server stalls

---
 src/main.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index f71d842..210e399 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -13,6 +13,7 @@
 #define PWM_RES 10
 #define MQTT_MANUFACTURER "Baumann Enkataleiptics"
 #define AUTH_USERNAME "admin"
+#define MQTT_PROBE_TIMEOUT_MS 400  // keep short: blocks loop()/handleClient() per reconnect attempt
 
 struct MeterConfig {
   int pin;
@@ -340,7 +341,7 @@ static void mqttLoop() {
     if (now > mqttReconnectAt) {
       Serial.printf("[MQTT] probing %s:%d\n", mqttCfg.host, mqttCfg.port);
       WiFiClient probe;
-      bool reachable = probe.connect(mqttCfg.host, mqttCfg.port, 1500);
+      bool reachable = probe.connect(mqttCfg.host, mqttCfg.port, MQTT_PROBE_TIMEOUT_MS);
       probe.stop();
 
       if (reachable) {