From 72e4d036c2f63e3326a5ea65f0ddefa373232bde Mon Sep 17 00:00:00 2001
From: "torlando-agent[bot]"
 <281092095+torlando-agent[bot]@users.noreply.github.com>
Date: Sat, 20 Jun 2026 20:19:45 -0400
Subject: [PATCH] fix(wifi): auto-reconnect after the AP drops the association

connect_wifi() never enabled auto-reconnect, and the loop's "WiFi reconnect
check" only re-attempted on the manual Settings -> Reconnect button. So a dropped
association left the device offline (no TCP, no AutoInterface, "no connection" in
the status bar) until a reboot. Enable WiFi.setAutoReconnect(true) + persistent,
and add a non-blocking backstop in the main loop that re-issues WiFi.begin()
every ~15s while disconnected -- setAutoReconnect alone doesn't cover every
disconnect reason. Verified the SSID/AP are fine (connects at boot); closes the
stay-offline-until-reboot gap.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UWZuYkHBRqNb6BZHV8sTG5
---
 src/main.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/main.cpp b/src/main.cpp
index 1bdcf49c..9a5111ea 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -539,6 +539,10 @@ void setup_wifi() {
     INFO(msg.c_str());
 
     WiFi.mode(WIFI_STA);
+    // Reconnect automatically if the AP drops the association — without this the
+    // device stays offline until a reboot or a manual Settings -> Reconnect.
+    WiFi.setAutoReconnect(true);
+    WiFi.persistent(true);
     WiFi.begin(app_settings.wifi_ssid.c_str(), app_settings.wifi_password.c_str());
 
     // Don't block boot waiting for WiFi association — the main loop
@@ -2445,6 +2449,20 @@ void loop() {
                 start_auto_interface();
             }
         }
+        // Backstop auto-reconnect: WiFi.setAutoReconnect() handles most drops in
+        // the background, but not every disconnect reason — without an explicit
+        // retry the device can sit offline until a reboot (which is exactly what
+        // happened). Re-issue begin() every ~15s while down. Non-blocking; the
+        // connected-edge above picks up once association lands.
+        if (!wifi_connected && app_settings.wifi_ssid.length() > 0) {
+            static uint32_t last_wifi_retry = 0;
+            uint32_t nowms = millis();
+            if (last_wifi_retry == 0 || (nowms - last_wifi_retry) >= 15000) {
+                last_wifi_retry = nowms;
+                INFO("WiFi down — attempting reconnect");
+                WiFi.begin(app_settings.wifi_ssid.c_str(), app_settings.wifi_password.c_str());
+            }
+        }
         last_wifi_connected = wifi_connected;
 
         bool tcp_online = tcp_interface && tcp_interface->online();