OTAMgr: check firmware endpoint; HTTPTOFS download; optional SHA256 verify; Update.apply + reboot

CAR_GPS_TRACKER.ino

@@ -6,6 +6,9 @@
 #include "src/app/AppConfig.hpp"
 #include "src/hw/PowerMgr.hpp"
 #include "src/hw/WiFiMgr.hpp"
+#include "src/core/OTAMgr.hpp"
+
+#define FW_VERSION "1.0.0"
 
 static AppConfig CFG;
 
@@ -26,6 +29,8 @@ void setup() {
   NetMgr::attachAndPdp(CFG.apn.c_str());
   SmsMgr::setup();
 
+ OTAMgr::setCurrentVersion(FW_VERSION);
+
   // 2) Identity
   CFG.imei = queryImei();
   if (CFG.imei.isEmpty()) CFG.imei = "860016049744324";