Add CommandMgr with HTTP GET queue + HttpClient.getJson

CAR_GPS_TRACKER.ino

@@ -1,11 +1,26 @@
 #include "src/core/NetMgr.hpp"
 #include "src/core/HttpClient.hpp"
 #include "src/core/SmsMgr.hpp"
+#include "src/core/CommandMgr.hpp"
+
+static String DEVICE_IMEI = "";
 
 static const char* APN      = "hologram";
 static const char* BASE_URL = "http://laravel-server.lab.audasmedia.com.au";
 static const char* PATH     = "/api/gps";
 
+static String queryImei() {
+  String r = NetMgr::sendAT("AT+CGSN", 3000);
+  // Response often includes the IMEI line + OK; take the first 15-digit line
+  int s = 0;
+  for (int i=0;i<(int)r.length();++i) {
+    if (isDigit(r[i])) { s = i; break; }
+  }
+  String imei = r.substring(s, s+15);
+  imei.trim();
+  return imei;
+}
+
 void setup() {
   Serial.begin(115200);
   Serial2.begin(9600, SERIAL_8N1, 16, 17); // RX=16, TX=17
@@ -14,6 +29,11 @@ void setup() {
   NetMgr::attachAndPdp(APN);               // LTE reg + CNACT + DNS
   SmsMgr::setup();                         // enable text mode + URCs
 
+   DEVICE_IMEI = queryImei();
+  if (DEVICE_IMEI.length()==0) DEVICE_IMEI = "860016049744324"; // fallback if needed
+
+  CommandMgr::configure(BASE_URL, DEVICE_IMEI);
+
   String json = "{\"device_id\":\"sim7080g-01\",\"lat\":-33.865143,"
                 "\"lng\":151.2099,\"speed\":12.5,\"altitude\":30.2}";
   HttpClient::postJson(BASE_URL, PATH, json);
@@ -21,6 +41,7 @@ void setup() {
 
 void loop() {
   SmsMgr::pollUrc();   // non‑blocking URC scan; handles +CMTI
+  CommandMgr::poll(30000); // every 30s
   SmsMgr::pollUnread(); // optional safety poll
   delay(250);
 }