update

README.md

@@ -65,13 +65,16 @@ Install via Library Manager (exact names to search for):
 
 | Library | Used for | Notes |
 |---|---|---|
-| `ArduinoJson` (by Benoit Blanchon) | REST API + WebSocket JSON | v7.x |
-| `ESP Async WebServer` (by me-no-dev / ESP32Async fork) | HTTP + WebSocket server | Only needed for stage 2 (`DIAGNOSTIC_MODE 0`). Check current ESP32-S3/Arduino-core-3.x compatibility for whichever fork you install — this ecosystem has had breaking forks; if it doesn't build, the `ESP32Async/ESPAsyncWebServer` fork is the actively maintained one as of this writing. |
+| `ArduinoJson` (by Benoit Blanchon) | REST API + WebSocket JSON | v7.x — code uses the current `JsonDocument` API (not the deprecated `StaticJsonDocument`) |
+| `ESP Async WebServer` (ESP32Async fork) | HTTP + WebSocket server | Only needed for stage 2 (`DIAGNOSTIC_MODE 0`) |
 | `AsyncTCP` | dependency of ESP Async WebServer | matching fork/version to the WebServer library above |
 
 Board package: **esp32 by Espressif Systems**, board = your specific
 ESP32-S3 dev board.
 
+Confirmed building clean (no warnings) with: esp32 core 3.3.11,
+ArduinoJson (JsonDocument API), ESP_Async_WebServer + Async_TCP.
+
 ## Project layout
 
 ```

WebServerManager.cpp

@@ -45,7 +45,7 @@ void WebServerManager::setupRoutes() {
     // Basic health check, handy when bringing up a new node in the
     // future multi-radar setup.
     _server.on("/status", HTTP_GET, [](AsyncWebServerRequest *request) {
-        StaticJsonDocument<128> doc;
+        JsonDocument doc;
         doc["status"] = "ok";
         doc["uptime_ms"] = millis();
         String out;
@@ -96,16 +96,16 @@ void WebServerManager::loop() {
 void WebServerManager::broadcastFrame(const RadarFrame &frame) {
     if (_ws.count() == 0) return; // skip serialization work if nobody's listening
 
-    StaticJsonDocument<512> doc;
+    JsonDocument doc;
     doc["sensor"] = "LD2453";
     doc["node_id"] = frame.node_id;
     doc["sequence"] = frame.sequence_number;
     doc["timestamp"] = frame.timestamp_ms;
 
-    JsonArray targets = doc.createNestedArray("targets");
+    JsonArray targets = doc["targets"].to<JsonArray>();
     for (uint8_t i = 0; i < frame.targetCount && i < 3; i++) {
         const RadarTarget &t = frame.targets[i];
-        JsonObject jt = targets.createNestedObject();
+        JsonObject jt = targets.add<JsonObject>();
         jt["id"] = i + 1; // radar slot index, NOT a persistent person ID
         jt["valid"] = t.valid;
         jt["x"] = t.x_mm;

ZoneManager.cpp

@@ -51,10 +51,10 @@ void ZoneManager::setZone(uint8_t zoneIndex, const Zone &zone) {
 }
 
 String ZoneManager::zonesToJson() const {
-    StaticJsonDocument<512> doc;
+    JsonDocument doc;
     JsonArray arr = doc.to<JsonArray>();
     for (uint8_t i = 0; i < MAX_ZONES; i++) {
-        JsonObject z = arr.createNestedObject();
+        JsonObject z = arr.add<JsonObject>();
         z["id"] = i + 1;
         z["x1"] = _zones[i].x1;
         z["y1"] = _zones[i].y1;
@@ -68,7 +68,7 @@ String ZoneManager::zonesToJson() const {
 }
 
 bool ZoneManager::zonesFromJson(const uint8_t *data, size_t len) {
-    StaticJsonDocument<512> doc;
+    JsonDocument doc;
     DeserializationError err = deserializeJson(doc, data, len);
     if (err) return false;