Branch version ready for testing with nRF52

src/esp32/VictronBLE_esp32.cpp

@@ -0,0 +1,69 @@
+/**
+ * VictronBLE - ESP32 BLE scanning backend
+ *
+ * Uses the ESP32 Arduino BLE library (Bluedroid). Extracts the manufacturer
+ * data, MAC and RSSI from each passive scan result and hands them to the
+ * platform-independent VictronBLE::onAdvertisement().
+ *
+ * Copyright (c) 2025 Scott Penrose
+ * License: MIT
+ */
+#include "../VictronBLE.h"
+
+#if defined(VICTRON_BACKEND_ESP32)
+
+#include <string>
+
+// Scan complete callback — clears the flag so loop() restarts the scan
+static bool s_scanning = false;
+static void onScanDone(BLEScanResults results) {
+    s_scanning = false;
+}
+
+bool VictronBLE::begin(uint32_t scanDuration) {
+    if (initialized) return true;
+    this->scanDuration = scanDuration;
+
+    BLEDevice::init("VictronBLE");
+    pBLEScan = BLEDevice::getScan();
+    if (!pBLEScan) return false;
+
+    scanCallbackObj = new VictronBLEAdvertisedDeviceCallbacks(this);
+    pBLEScan->setAdvertisedDeviceCallbacks(scanCallbackObj, true);
+    pBLEScan->setActiveScan(false);   // passive: Victron beacons are non-connectable
+    pBLEScan->setInterval(100);
+    pBLEScan->setWindow(99);
+
+    initialized = true;
+    if (debugEnabled) Serial.println("[VictronBLE] Initialized (ESP32 backend)");
+    return true;
+}
+
+void VictronBLE::loop() {
+    if (!initialized) return;
+    if (!s_scanning) {
+        pBLEScan->clearResults();
+        s_scanning = pBLEScan->start(scanDuration, onScanDone, false);
+    }
+}
+
+// BLE scan callback
+void VictronBLEAdvertisedDeviceCallbacks::onResult(BLEAdvertisedDevice advertisedDevice) {
+    if (victronBLE) victronBLE->processDevice(advertisedDevice);
+}
+
+void VictronBLE::processDevice(BLEAdvertisedDevice& advertisedDevice) {
+    if (!advertisedDevice.haveManufacturerData()) return;
+
+    // getManufacturerData() returns std::string on older ESP32 BLE libraries and
+    // an Arduino String on newer ones. Both expose c_str()/length(); building a
+    // std::string from (ptr, len) preserves the binary payload's null bytes.
+    auto mfg = advertisedDevice.getManufacturerData();
+    std::string raw(mfg.c_str(), mfg.length());
+
+    onAdvertisement(reinterpret_cast<const uint8_t*>(raw.data()), raw.length(),
+                    advertisedDevice.getAddress().toString().c_str(),
+                    advertisedDevice.getRSSI());
+}
+
+#endif // VICTRON_BACKEND_ESP32