From aed0d1a13eaf9388e81e139b8cda78ce00c03afc Mon Sep 17 00:00:00 2001
From: "Adrian A. Baumann" <ade@adebaumann.com>
Date: Fri, 19 Jun 2026 22:49:50 +0200
Subject: [PATCH] Not saving to flash anymore (flash wear prevention)

---
 src/main.cpp | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index ab24ae9..2fb7c0c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -189,7 +189,6 @@ static void mqttCallback(char* topic, byte* payload, unsigned int len) {
       float pct = meters[idx].currentValue / 100.0f * meters[idx].maxDuty / 100.0f;
       ledcWrite(idx, constrain((int)(pct * 1023), 0, 1023));
     }
-    saveConfig();
     mqttPublishCurrent(idx);
   }
 }
@@ -401,14 +400,14 @@ static void handleRoot() {
 
     String hostVal = escHtml(mqttCfg.host);
     String userVal = escHtml(mqttCfg.user);
-    String passVal = escHtml(mqttCfg.pass);
     String prefVal = escHtml(mqttCfg.prefix);
+    const char* passHint = strlen(mqttCfg.pass) > 0 ? "set &#8212; leave blank to keep" : "enter password";
 
     mqttSection +=
       "<div class=row><label>Broker</label><input name=mqtt_host value='" + hostVal + "'></div>"
       "<div class=row><label>Port</label><input name=mqtt_port type=number value=" + String(portStr) + "></div>"
       "<div class=row><label>User</label><input name=mqtt_user value='" + userVal + "'></div>"
-      "<div class=row><label>Pass</label><input name=mqtt_pass type=password value='" + passVal + "'></div>"
+      "<div class=row><label>Pass</label><input name=mqtt_pass type=password placeholder='" + String(passHint) + "'></div>"
       "<div class=row><label>Prefix</label><input name=mqtt_prefix value='" + prefVal + "'></div>";
     mqttSection += "</fieldset>";
   }
@@ -485,7 +484,7 @@ static void handleConfig() {
       mqttCfg.port = server.arg("mqtt_port").toInt();
     if (server.hasArg("mqtt_user"))
       strlcpy(mqttCfg.user, server.arg("mqtt_user").c_str(), sizeof(mqttCfg.user));
-    if (server.hasArg("mqtt_pass"))
+    if (server.hasArg("mqtt_pass") && server.arg("mqtt_pass").length() > 0)
       strlcpy(mqttCfg.pass, server.arg("mqtt_pass").c_str(), sizeof(mqttCfg.pass));
     if (server.hasArg("mqtt_prefix"))
       strlcpy(mqttCfg.prefix, server.arg("mqtt_prefix").c_str(), sizeof(mqttCfg.prefix));
@@ -548,7 +547,6 @@ static void handleSet() {
     int duty = constrain((int)(pct * 1023), 0, 1023);
     ledcWrite(idx, duty);
   }
-  saveConfig();
   mqttPublishCurrent(idx);
   server.send(200);
 }