diff --git a/CAR_GPS_TRACKER.ino b/CAR_GPS_TRACKER.ino
index 3af325d..d7e4baa 100644
--- a/CAR_GPS_TRACKER.ino
+++ b/CAR_GPS_TRACKER.ino
@@ -56,7 +56,7 @@ void loop() {
     // Telemetry every A seconds
     if (millis() - lastTelemetryMs >= CFG.telemetryPeriodSec * 1000UL) {
       double lat, lng, alt, spd, hdg;
-      Telemetry::read(lat, lng, alt, spd, hdg);
+      Telemetry::readGNSS(lat, lng, alt, spd, hdg);
       String json = Telemetry::buildJson(CFG.imei, lat, lng, alt, spd, hdg, carOn);
       HttpClient::postJson(CFG.baseUrl, CFG.telemetryPath, json);
       lastTelemetryMs = millis();
diff --git a/src/core/Telemetry.cpp b/src/core/Telemetry.cpp
index f1f6e9f..f30dc83 100644
--- a/src/core/Telemetry.cpp
+++ b/src/core/Telemetry.cpp
@@ -45,4 +45,8 @@ String buildJson(const String& imei, double lat, double lng, double alt, double
   return j;
 }
 
-} // namespace Telemetry
\ No newline at end of file
+String buildNoPowerJson(const String& imei) {
+  return String("{\"device_id\":\"") + imei + "\",\"car_power\":false}";
+}
+
+} // namespace Telemetry namespace Telemetry
\ No newline at end of file