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fix(wifi): auto-reconnect after the AP drops the association

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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
This commit is contained in:
torlando-agent[bot]
2026-06-20 20:19:45 -04:00
co-authored by Claude Opus 4.8
parent d7518eb187
commit 72e4d036c2
1 changed files with 18 additions and 0 deletions
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src/main.cpp
+18
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@@ -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();