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Add WiFi disconnect watchdog + re-enable debug logging

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- Remove -DNDEBUG to get LOG_TRACE output for WiFi disconnect investigation
- Add WiFi watchdog in main loop: detects WiFi loss, prints diagnostics
  (WiFi status, RSSI, heap, TCP state, bridge stats), then halts serial
  output after 5s grace period so operator can read the last log lines
- Device keeps running as LoRa repeater even when serial is frozen
- Reboot required to resume serial output
This commit is contained in:
James L
2026-02-25 10:23:36 -05:00
parent 50e392c45b
commit 8ee8e86563
2 changed files with 68 additions and 1 deletions
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67
RNode_Firmware.ino
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@@ -2229,6 +2229,71 @@ void loop() {
}
#ifdef BOUNDARY_MODE
// ── WiFi disconnect watchdog ──────────────────────────────────────────────
// When WiFi drops, dump diagnostic info and halt serial output so the
// operator can read the last log lines over USB. The device keeps running
// (LoRa repeater still works) but serial is frozen until reboot.
{
static bool _wifi_watchdog_armed = false; // armed once WiFi first connects
static bool _wifi_watchdog_halted = false; // true = serial frozen
static uint32_t _wifi_lost_at = 0; // millis() when WiFi first lost
static const uint32_t WIFI_GRACE_MS = 5000; // 5 s grace before halting
if (_wifi_watchdog_halted) {
// Frozen — skip all boundary work, just keep LoRa running
goto boundary_done;
}
bool wifi_now = wifi_is_connected();
// Arm the watchdog once WiFi has been up at least once
if (!_wifi_watchdog_armed && wifi_now) {
_wifi_watchdog_armed = true;
_wifi_lost_at = 0;
}
if (_wifi_watchdog_armed && !wifi_now) {
if (_wifi_lost_at == 0) {
_wifi_lost_at = millis();
Serial.printf("\r\n[WATCHDOG] WiFi connection LOST at %lu ms — grace period %lu ms\r\n",
_wifi_lost_at, WIFI_GRACE_MS);
Serial.printf("[WATCHDOG] WiFi.status() = %d RSSI = %d\r\n",
(int)WiFi.status(), (int)WiFi.RSSI());
Serial.printf("[WATCHDOG] Free heap: %u Min free heap: %u\r\n",
ESP.getFreeHeap(), ESP.getMinFreeHeap());
Serial.printf("[WATCHDOG] TCP backbone connected: %s clients: %d\r\n",
(tcp_interface_ptr && tcp_interface_ptr->isConnected()) ? "yes" : "no",
tcp_interface_ptr ? tcp_interface_ptr->clientCount() : 0);
if (local_tcp_interface_ptr) {
Serial.printf("[WATCHDOG] Local TCP connected: %s clients: %d\r\n",
local_tcp_interface_ptr->isConnected() ? "yes" : "no",
local_tcp_interface_ptr->clientCount());
}
Serial.flush();
}
// Check if grace period expired
if ((millis() - _wifi_lost_at) >= WIFI_GRACE_MS) {
Serial.printf("\r\n[WATCHDOG] *** WiFi still down after %lu ms — HALTING SERIAL OUTPUT ***\r\n",
millis() - _wifi_lost_at);
Serial.printf("[WATCHDOG] WiFi.status() = %d RSSI = %d\r\n",
(int)WiFi.status(), (int)WiFi.RSSI());
Serial.printf("[WATCHDOG] Last boundary activity: %lu ms ago\r\n",
millis() - boundary_state.last_bridge_activity);
Serial.printf("[WATCHDOG] Packets bridged: LoRa→TCP=%lu TCP→LoRa=%lu\r\n",
boundary_state.packets_bridged_lora_to_tcp,
boundary_state.packets_bridged_tcp_to_lora);
Serial.println("[WATCHDOG] Device still running (LoRa repeater active). Reboot to resume.");
Serial.flush();
_wifi_watchdog_halted = true;
goto boundary_done;
}
} else if (_wifi_watchdog_armed && wifi_now && _wifi_lost_at != 0) {
// WiFi came back within grace period
Serial.printf("[WATCHDOG] WiFi reconnected after %lu ms\r\n", millis() - _wifi_lost_at);
_wifi_lost_at = 0;
}
}
// Boundary Mode: poll TCP interfaces for incoming data
if (boundary_state.wifi_enabled) {
// Start TCP interfaces if WiFi just connected and not yet started
@@ -2252,6 +2317,8 @@ void loop() {
boundary_state.ap_tcp_connected = (local_tcp_interface_ptr && local_tcp_interface_ptr->isConnected());
boundary_state.wifi_connected = wifi_is_connected();
}
boundary_done:
#endif
#endif