upstream dev sync

zephcore/app/RepeaterMesh.cpp

@@ -968,6 +968,7 @@ void RepeaterMesh::onControlDataRecv(mesh::Packet* packet) {
   uint8_t type = packet->payload[0] & 0xF0;    // just test upper 4 bits
   if (type == CTL_TYPE_NODE_DISCOVER_REQ && packet->payload_len >= 6
       && !_prefs.disable_fwd && discover_limiter.allow(rtc_clock.getCurrentTime())
+      && !isHiddenNode()   // this node wishes to NOT be discoverable
   ) {
     int i = 1;
     uint8_t  filter = packet->payload[i++];

zephcore/app/RepeaterMesh.h

@@ -241,6 +241,9 @@ public:
   NodePrefs* getNodePrefs() {
     return &_prefs;
   }
+  bool isHiddenNode() const {
+    return _prefs.advert_interval == 0 && _prefs.flood_advert_interval == 0;
+  }
 
   void savePrefs() override;  // ZEPHCORE: through RepeaterDataStore
 

zephcore/boards/common/esp32c3s3_common.conf

@@ -40,8 +40,9 @@ CONFIG_HEAP_MEM_POOL_SIZE=45056
 # Measured on a XIAO ESP32-S3 companion (2026-10-06, CONFIG_ZEPHCORE_MEM_STATS,
 # devdocs/tools/mem_load.py: fresh pairing, bonded reconnects, protocol golden
 # over BLE, 8 KB sign, 121-contact dump over BLE): peak 980 B at 4096, and
-# 964 B in the same run with the stack at 2048.  2048 is 2.1x the peak and
+# 964 B in the same run with the stack at 2048.  With a Wi-Fi station link up
+# (TCP companion, 8 parallel 1400-byte pings, BLE sessions with contact dumps)
+# the peak is 1108 B, the same on 7 boots out of 7.  2048 is 1.85x that and
 # returns 2 KB of dram0, which the no-PSRAM Wi-Fi + BLE companions (Heltec V3,
-# Wireless Tracker) need.  Not measured with a Wi-Fi station link up
-# (coexistence), and not measured on C3 hardware.
+# Wireless Tracker) need.  Not measured on C3 hardware.
 CONFIG_ESP32_BT_CONTROLLER_STACK_SIZE=2048