Add BLE scanner sketch for finding hub addresses

2026-08-27 19:32:50 +10:00
parent fe7960a00e
commit 9ca087836c
1 changed files with 49 additions and 0 deletions
@@ -0,0 +1,49 @@
+/*
+ * hub_scanner.ino  --  find the BLE addresses of your LEGO hubs
+ *
+ * Board package: esp32 (the normal Espressif one)
+ * Libraries:     NimBLE-Arduino 1.4.x  (same version Legoino wants)
+ *
+ * Flash this to the receiver board, open the serial monitor at 115200, then
+ * press the green button on one hub at a time. Anything advertising the LEGO
+ * Wireless Protocol service (00001623-1212-EFDE-1623-785FEABCD123) is printed
+ * with its address. Copy those into receiver.ino.
+ *
+ * Created by: Jess Rogerson (yelling commands at Claude.AI)
+ */
+
+#include <NimBLEDevice.h>
+
+static const char *LPF2_SERVICE = "00001623-1212-efde-1623-785feabcd123";
+
+void setup() {
+    Serial.begin(115200);
+    delay(500);
+    Serial.println("Scanning for LEGO hubs - press a hub button to wake it up");
+
+    NimBLEDevice::init("hub-scanner");
+    NimBLEScan *scan = NimBLEDevice::getScan();
+    scan->setActiveScan(true);
+    scan->setInterval(100);
+    scan->setWindow(99);
+}
+
+void loop() {
+    NimBLEScan *scan = NimBLEDevice::getScan();
+    NimBLEScanResults results = scan->start(5, false);
+
+    Serial.println("---- scan pass ----");
+    for (int i = 0; i < results.getCount(); i++) {
+        NimBLEAdvertisedDevice dev = results.getDevice(i);
+        bool isLego = dev.isAdvertisingService(NimBLEUUID(LPF2_SERVICE));
+        if (!isLego && dev.getName().empty()) continue;
+
+        Serial.print(dev.getAddress().toString().c_str());
+        Serial.print("  rssi ");
+        Serial.print(dev.getRSSI());
+        Serial.print("  ");
+        Serial.print(dev.getName().c_str());
+        Serial.println(isLego ? "   <-- LEGO HUB" : "");
+    }
+    scan->clearResults();
+}