diff -r 88d965579617 -r 1082183cd6bb main/config.c
--- a/main/config.c	Tue Oct 08 12:00:31 2019 +0200
+++ b/main/config.c	Tue Oct 08 12:55:23 2019 +0200
@@ -39,7 +39,7 @@
 	// No configuration yet, create it.
 	esp_efuse_mac_get_default(mac_addr);
 	config.Version = 1;
-	sprintf(config.hostname, "pressure-%02x%02x%02x", mac_addr[3], mac_addr[4], mac_addr[5]);
+	sprintf(config.hostname, "co2meter-%02x%02x%02x", mac_addr[3], mac_addr[4], mac_addr[5]);
 	config.mqtt_server[0] = '\0';
 	config.mqtt_port = 1883;
 	config.mqtt_user[0] = '\0';