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Commit 8ee8e86563f0fcd7e01ccc9957a8a65b89080f90

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Parents : 50e392c
Author : James L <jrl290@gmail.com>
Date : 2026-02-25T10:23:36-05:00

Add WiFi disconnect watchdog + re-enable debug logging

- 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

Changes

2 files changed, 68 insertions(+), 1 deletions(-)

M RNode_Firmware.ino +67
M platformio.ini +1 -1

Diff

diff --git a/RNode_Firmware.ino b/RNode_Firmware.ino
index 0ccbe30..8bcec68 100755
--- a/RNode_Firmware.ino
+++ b/RNode_Firmware.ino
@@ -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

diff --git a/platformio.ini b/platformio.ini
index 9e39106..0f2d1e1 100755
--- a/platformio.ini
+++ b/platformio.ini
@@ -342,7 +342,7 @@ build_flags =
-DARDUINO_USB_CDC_ON_BOOT=1
-DBOARD_HAS_PSRAM=1
-DBOUNDARY_MODE
- -DNDEBUG
+ ;-DNDEBUG ; re-enable debug output for WiFi disconnect investigation
; --- Boundary mode defaults (override via EEPROM at runtime) ---
; TCP server mode (0=server, 1=client)
-DBOUNDARY_TCP_MODE=0

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