diff --git a/lib/esp-knx-ip-0.5.1/DPT.h b/lib/esp-knx-ip-0.5.2/DPT.h
similarity index 95%
rename from lib/esp-knx-ip-0.5.1/DPT.h
rename to lib/esp-knx-ip-0.5.2/DPT.h
index 71045b103..3529d51af 100644
--- a/lib/esp-knx-ip-0.5.1/DPT.h
+++ b/lib/esp-knx-ip-0.5.2/DPT.h
@@ -40,13 +40,14 @@ typedef enum __dpt_3_007
 
 typedef enum __weekday
 {
+	DPT_10_001_WEEKDAY_NODAY = 0,
 	DPT_10_001_WEEKDAY_MONDAY = 1,
 	DPT_10_001_WEEKDAY_TUESDAY = 2,
 	DPT_10_001_WEEKDAY_WEDNESDAY = 3,
 	DPT_10_001_WEEKDAY_THURSDAY = 4,
 	DPT_10_001_WEEKDAY_FRIDAY = 5,
 	DPT_10_001_WEEKDAY_SATURDAY = 6,
-	DPT_10_001_WEEKDAY_SUNDAY = 8,
+	DPT_10_001_WEEKDAY_SUNDAY = 7,
 } weekday_t;
 
 typedef struct __time_of_day
diff --git a/lib/esp-knx-ip-0.5.1/LICENSE b/lib/esp-knx-ip-0.5.2/LICENSE
similarity index 100%
rename from lib/esp-knx-ip-0.5.1/LICENSE
rename to lib/esp-knx-ip-0.5.2/LICENSE
diff --git a/lib/esp-knx-ip-0.5.1/README.md b/lib/esp-knx-ip-0.5.2/README.md
similarity index 100%
rename from lib/esp-knx-ip-0.5.1/README.md
rename to lib/esp-knx-ip-0.5.2/README.md
diff --git a/lib/esp-knx-ip-0.5.1/esp-knx-ip-config.cpp b/lib/esp-knx-ip-0.5.2/esp-knx-ip-config.cpp
similarity index 100%
rename from lib/esp-knx-ip-0.5.1/esp-knx-ip-config.cpp
rename to lib/esp-knx-ip-0.5.2/esp-knx-ip-config.cpp
diff --git a/lib/esp-knx-ip-0.5.1/esp-knx-ip-conversion.cpp b/lib/esp-knx-ip-0.5.2/esp-knx-ip-conversion.cpp
similarity index 100%
rename from lib/esp-knx-ip-0.5.1/esp-knx-ip-conversion.cpp
rename to lib/esp-knx-ip-0.5.2/esp-knx-ip-conversion.cpp
diff --git a/lib/esp-knx-ip-0.5.1/esp-knx-ip-send.cpp b/lib/esp-knx-ip-0.5.2/esp-knx-ip-send.cpp
similarity index 96%
rename from lib/esp-knx-ip-0.5.1/esp-knx-ip-send.cpp
rename to lib/esp-knx-ip-0.5.2/esp-knx-ip-send.cpp
index ae5e9fabc..787f045bf 100644
--- a/lib/esp-knx-ip-0.5.1/esp-knx-ip-send.cpp
+++ b/lib/esp-knx-ip-0.5.2/esp-knx-ip-send.cpp
@@ -185,3 +185,15 @@ void ESPKNXIP::send_4byte_float(address_t const &receiver, knx_command_type_t ct
 	uint8_t buf[] = {0x00, ((uint8_t *)&val)[3], ((uint8_t *)&val)[2], ((uint8_t *)&val)[1], ((uint8_t *)&val)[0]};
 	send(receiver, ct, 5, buf);
 }
+
+void ESPKNXIP::send_14byte_string(address_t const &receiver, knx_command_type_t ct, const char *val)
+{
+	uint8_t buf[14];
+	int len = strlen(val);
+	if (len > 14)
+	{
+		len = 14;
+	}
+	memcpy(buf, val, len);
+	send(receiver, ct, 14, buf);
+}
diff --git a/lib/esp-knx-ip-0.5.1/esp-knx-ip-webserver.cpp b/lib/esp-knx-ip-0.5.2/esp-knx-ip-webserver.cpp
similarity index 100%
rename from lib/esp-knx-ip-0.5.1/esp-knx-ip-webserver.cpp
rename to lib/esp-knx-ip-0.5.2/esp-knx-ip-webserver.cpp
diff --git a/lib/esp-knx-ip-0.5.1/esp-knx-ip.cpp b/lib/esp-knx-ip-0.5.2/esp-knx-ip.cpp
similarity index 100%
rename from lib/esp-knx-ip-0.5.1/esp-knx-ip.cpp
rename to lib/esp-knx-ip-0.5.2/esp-knx-ip.cpp
diff --git a/lib/esp-knx-ip-0.5.1/esp-knx-ip.h b/lib/esp-knx-ip-0.5.2/esp-knx-ip.h
similarity index 98%
rename from lib/esp-knx-ip-0.5.1/esp-knx-ip.h
rename to lib/esp-knx-ip-0.5.2/esp-knx-ip.h
index e2346c5a3..eb5ecf7b0 100644
--- a/lib/esp-knx-ip-0.5.1/esp-knx-ip.h
+++ b/lib/esp-knx-ip-0.5.2/esp-knx-ip.h
@@ -451,6 +451,7 @@ class ESPKNXIP {
     void send_4byte_int(address_t const &receiver, knx_command_type_t ct, int32_t val);
     void send_4byte_uint(address_t const &receiver, knx_command_type_t ct, uint32_t val);
     void send_4byte_float(address_t const &receiver, knx_command_type_t ct, float val);
+    void send_14byte_string(address_t const &receiver, knx_command_type_t ct, const char *val);
 
     void write_1bit(address_t const &receiver, uint8_t bit) { send_1bit(receiver, KNX_CT_WRITE, bit); }
     void write_2bit(address_t const &receiver, uint8_t twobit) { send_2bit(receiver, KNX_CT_WRITE, twobit); }
@@ -469,6 +470,7 @@ class ESPKNXIP {
     void write_4byte_int(address_t const &receiver, int32_t val) { send_4byte_int(receiver, KNX_CT_WRITE, val); }
     void write_4byte_uint(address_t const &receiver, uint32_t val) { send_4byte_uint(receiver, KNX_CT_WRITE, val); }
     void write_4byte_float(address_t const &receiver, float val) { send_4byte_float(receiver, KNX_CT_WRITE, val);}
+    void write_14byte_string(address_t const &receiver, const char *val) { send_14byte_string(receiver, KNX_CT_WRITE, val); }
 
     void answer_1bit(address_t const &receiver, uint8_t bit) { send_1bit(receiver, KNX_CT_ANSWER, bit); }
     void answer_2bit(address_t const &receiver, uint8_t twobit) { send_2bit(receiver, KNX_CT_ANSWER, twobit); }
@@ -487,6 +489,7 @@ class ESPKNXIP {
     void answer_4byte_int(address_t const &receiver, int32_t val) { send_4byte_int(receiver, KNX_CT_ANSWER, val); }
     void answer_4byte_uint(address_t const &receiver, uint32_t val) { send_4byte_uint(receiver, KNX_CT_ANSWER, val); }
     void answer_4byte_float(address_t const &receiver, float val) { send_4byte_float(receiver, KNX_CT_ANSWER, val);}
+    void answer_14byte_string(address_t const &receiver, const char *val) { send_14byte_string(receiver, KNX_CT_ANSWER, val); }
 
     bool          data_to_bool(uint8_t *data);
     int8_t        data_to_1byte_int(uint8_t *data);
diff --git a/lib/esp-knx-ip-0.5.1/examples/environment-sensor/environment-sensor.ino b/lib/esp-knx-ip-0.5.2/examples/environment-sensor/environment-sensor.ino
similarity index 100%
rename from lib/esp-knx-ip-0.5.1/examples/environment-sensor/environment-sensor.ino
rename to lib/esp-knx-ip-0.5.2/examples/environment-sensor/environment-sensor.ino
diff --git a/lib/esp-knx-ip-0.5.1/examples/sonoff/sonoff.ino b/lib/esp-knx-ip-0.5.2/examples/sonoff/sonoff.ino
similarity index 100%
rename from lib/esp-knx-ip-0.5.1/examples/sonoff/sonoff.ino
rename to lib/esp-knx-ip-0.5.2/examples/sonoff/sonoff.ino
diff --git a/lib/esp-knx-ip-0.5.1/examples/static-config/static-config.ino b/lib/esp-knx-ip-0.5.2/examples/static-config/static-config.ino
similarity index 87%
rename from lib/esp-knx-ip-0.5.1/examples/static-config/static-config.ino
rename to lib/esp-knx-ip-0.5.2/examples/static-config/static-config.ino
index bea5093f3..54472dda3 100644
--- a/lib/esp-knx-ip-0.5.1/examples/static-config/static-config.ino
+++ b/lib/esp-knx-ip-0.5.2/examples/static-config/static-config.ino
@@ -31,14 +31,14 @@ void setup() {
   pinMode(LED_PIN, OUTPUT);
   Serial.begin(115200);
 
-  callback_id_t temp_cb = knx.callback_register("Read Temperature", temp_cb);
-  callback_id_t hum_cb =knx.callback_register("Read Humidity", hum_cb);
-  callback_id_t pres_cb =knx.callback_register("Read Pressure", pres_cb);
+  callback_id_t temp_cb_id = knx.callback_register("Read Temperature", temp_cb);
+  callback_id_t hum_cb_id =knx.callback_register("Read Humidity", hum_cb);
+  callback_id_t pres_cb_id =knx.callback_register("Read Pressure", pres_cb);
 
   // Assign callbacks to group addresses (2/1/1, 2/1/2, 2/1/3)
-  knx.callback_assign(temp_cb, knx.GA_to_address(2, 1, 1));
-  knx.callback_assign(hum_cb, knx.GA_to_address(2, 1, 2));
-  knx.callback_assign(pres_cb, knx.GA_to_address(2, 1, 3));
+  knx.callback_assign(temp_cb_id, knx.GA_to_address(2, 1, 1));
+  knx.callback_assign(hum_cb_id, knx.GA_to_address(2, 1, 2));
+  knx.callback_assign(pres_cb_id, knx.GA_to_address(2, 1, 3));
 
   // Set physical address (1.1.1)
   knx.physical_address_set(knx.PA_to_address(1, 1, 1));
diff --git a/lib/esp-knx-ip-0.5.1/keywords.txt b/lib/esp-knx-ip-0.5.2/keywords.txt
similarity index 100%
rename from lib/esp-knx-ip-0.5.1/keywords.txt
rename to lib/esp-knx-ip-0.5.2/keywords.txt
diff --git a/lib/esp-knx-ip-0.5.1/library.properties b/lib/esp-knx-ip-0.5.2/library.properties
similarity index 95%
rename from lib/esp-knx-ip-0.5.1/library.properties
rename to lib/esp-knx-ip-0.5.2/library.properties
index 1adbc402a..f3b86de9c 100644
--- a/lib/esp-knx-ip-0.5.1/library.properties
+++ b/lib/esp-knx-ip-0.5.2/library.properties
@@ -1,5 +1,5 @@
 name=ESP KNX IP Library
-version=0.5.1
+version=0.5.2
 author=Nico Weichbrodt <envy>
 maintainer=Nico Weichbrodt <envy>
 sentence=ESP8266 library for KNX/IP communication.