diff -r 20c14b06f255 -r 3b1834482899 main/task_mqtt.c
--- a/main/task_mqtt.c	Mon Apr 06 20:01:51 2020 +0200
+++ b/main/task_mqtt.c	Fri Apr 10 11:51:40 2020 +0200
@@ -201,8 +201,10 @@
     payload = payload_header();
     payload = xstrcat(payload, (char *)"{\"uuid\":\"");
     payload = xstrcat(payload, config.uuid);
-    payload = xstrcat(payload, (char *)"\",");
-    payload = xstrcat(payload, (char *)"\"properties\":{\"hardwaremake\":\"Unknown\",\"hardwaremodel\":\"");
+    payload = xstrcat(payload, (char *)"\",\"interval\":");
+    sprintf(buf, "%d", MAINLOOP_TIMER);
+    payload = xstrcat(payload, buf);
+    payload = xstrcat(payload, (char *)",\"properties\":{\"hardwaremake\":\"Unknown\",\"hardwaremodel\":\"");
     sprintf(buf, "ESP32 %d cores rev %d, WiFi bgn", chip_info.cores, chip_info.revision);
     payload = xstrcat(payload, buf);
     payload = xstrcat(payload, (char *)"\",\"os\":\"esp-idf\",\"os_version\":\"");