diff --git a/ESP-1ch-Gateway-v5.0-master/ESP-sc-gway/ESP-sc-gway.ino b/ESP-1ch-Gateway-v5.0-master/ESP-sc-gway/ESP-sc-gway.ino
index ea8cda57931f8a08c1445be0874d09de9602e854..977a5d212663e96025842375edddf8d565cb7d38 100644
--- a/ESP-1ch-Gateway-v5.0-master/ESP-sc-gway/ESP-sc-gway.ino
+++ b/ESP-1ch-Gateway-v5.0-master/ESP-sc-gway/ESP-sc-gway.ino
@@ -111,7 +111,10 @@ extern "C" {
 #endif//ESP_ARCH
 
 // ----------- Declaration of vars --------------
-static const char* connectionString = "HostName=SepIoTHub.azure-devices.net;DeviceId=Node1;SharedAccessKey=dZfUU6HJc+TCioN8sbiCgSb/zVK0bgEOiTLKryj6lPA=";
+#define SEP_CONNECTION_STRING "HostName=SepIoTHub.azure-devices.net;DeviceId=Node1;SharedAccessKey=dZfUU6HJc+TCioN8sbiCgSb/zVK0bgEOiTLKryj6lPA="
+#define SAM_CONNECTION_STRING "HostName=Sam-Murray-Student-IoT-Hub.azure-devices.net;DeviceId=CSCE838-IoT-Sam-Murray;SharedAccessKey=QakoDPCyhIYVOGhf0vcwS+DrHq8rMRWLyS0JmUK8ak0="
+#define MARCUS_CONNECTION_STRING "HostName=CSCE838-IoT.azure-devices.net;DeviceId=Gateway;SharedAccessKey=45a4Yyi98WLO2d7Dudf+jR5r05T063sLWd1UpyCYsAI="
+static const char* connectionString = SEP_CONNECTION_STRING;
 uint8_t debug=1;								// Debug level! 0 is no msgs, 1 normal, 2 extensive
 uint8_t pdebug=0xFF;							// Allow all atterns (departments)