diff --git a/WiFi_Shield.ino b/WiFi_Shield.ino
index 778eaa9..d1bb26a 100644
--- a/WiFi_Shield.ino
+++ b/WiFi_Shield.ino
@@ -61,7 +61,7 @@ enum UpdateStatus {
 */
 
 unsigned long HW_GROUP = 1;               // Changes with hardware changes that require software changes
-unsigned long FW_VERSION = 1802120001;    // Changes with each release; must always increase
+unsigned long FW_VERSION = 1802130009;    // Changes with each release; must always increase
 unsigned long SP_VERSION = 0;             // Loaded from SPIFFS; changed with each SPIFFS build; must always increase (uses timestamp as version)
 
 // HTTPS update settings
@@ -357,7 +357,7 @@ void ISR_config() {
 }
 
 /*
-   MAIN PROGRAM ROUTINES
+   PROGRAM ROUTINES
 */
 
 void doWiFiConfigViaWPS() {
@@ -384,6 +384,24 @@ void doWiFiConfigViaAP() {
   setLED(1);
 }
 
+void printIPAddress() {
+  // TODO: Stops working after the first time
+  IPAddress addr = WiFi.localIP();
+  String addrStr;
+  addrStr += String(addr[0]);
+  addrStr += ".";
+  addrStr += String(addr[1]);
+  addrStr += ".";
+  addrStr += String(addr[2]);
+  addrStr += ".";
+  addrStr += String(addr[3]);
+  IBIS_DS009(addrStr);
+}
+
+/*
+   FIRMWARE & SPIFFS UPDATE
+*/
+
 UpdateStatus checkForFWUpdate() {
   /*WiFiClientSecure httpsClient;
     if (!httpsClient.connect(UPDATE_HOST.c_str(), UPDATE_PORT)) {
@@ -451,6 +469,10 @@ void doSPUpdate() {
   t_httpUpdate_return ret = ESPhttpUpdate.updateSpiffs(url);
 }
 
+/*
+   MAIN PROGRAM
+*/
+
 void setup() {
   pinMode(PIN_STATUS, OUTPUT);
   pinMode(PIN_CONFIG, INPUT_PULLUP);
@@ -567,6 +589,11 @@ void loop() {
           doWiFiConfigViaAP();
           break;
         }
+      case 3: {
+          // AP mode
+          printIPAddress();
+          break;
+        }
       default: {
           break;
         }
diff --git a/firmware.bin b/firmware.bin
index 17fd249..eb757eb 100644
Binary files a/firmware.bin and b/firmware.bin differ
diff --git a/firmware.version b/firmware.version
index 6cbc7f9..23df24b 100644
--- a/firmware.version
+++ b/firmware.version
@@ -1 +1 @@
-1802120001
\ No newline at end of file
+1802130009
\ No newline at end of file
diff --git a/ibis.h b/ibis.h
index fec5e95..b8a9831 100644
--- a/ibis.h
+++ b/ibis.h
@@ -12,6 +12,18 @@ void IBIS_processSpecialCharacters(String* telegram) {
   telegram->replace("Ü", "]");
 }
 
+String IBIS_vdvHex(byte value) {
+  String vdvHexCharacters = "0123456789:;<=>?";
+  String vdvHexValue;
+  byte highNibble = value >> 4;
+  byte lowNibble = value & 15;
+  if (highNibble > 0) {
+    vdvHexValue += vdvHexCharacters.charAt(highNibble);
+  }
+  vdvHexValue += vdvHexCharacters.charAt(lowNibble);
+  return vdvHexValue;
+}
+
 String IBIS_wrapTelegram(String telegram) {
   telegram += '\x0d';
   unsigned char checksum = 0x7F;
@@ -30,8 +42,61 @@ void IBIS_sendTelegram(String telegram) {
   Serial.print(telegram);
 }
 
+void IBIS_DS003a(String text) {
+  String telegram;
+  byte numBlocks = ceil(text.length() / 16.0);
+  telegram = "zA";
+  telegram += IBIS_vdvHex(numBlocks);
+  telegram += text;
+  byte remainder = text.length() % 16;
+  if (remainder > 0) {
+    for (byte i = 16; i > remainder; i--) {
+      telegram += " ";
+    }
+  }
+  IBIS_sendTelegram(telegram);
+}
+
+void IBIS_DS003c(String text) {
+  String telegram;
+  byte numBlocks = ceil(text.length() / 4.0);
+  telegram = "zI";
+  telegram += IBIS_vdvHex(numBlocks);
+  telegram += text;
+  byte remainder = text.length() % 4;
+  if (remainder > 0) {
+    for (byte i = 4; i > remainder; i--) {
+      telegram += " ";
+    }
+  }
+  IBIS_sendTelegram(telegram);
+}
+
 void IBIS_DS009(String text) {
   String telegram = "v" + text;
   IBIS_sendTelegram(telegram);
 }
 
+void IBIS_GSP(byte address, String line1, String line2) {
+  String telegram;
+  String lines;
+  lines += line1;
+  if (line2.length() > 0) {
+    lines += "\x0a";
+  }
+  lines += line2;
+  lines += "\x0a\x0a";
+  byte numBlocks = ceil(lines.length() / 16.0);
+  byte remainder = lines.length() % 16;
+  if (remainder > 0) {
+    for (byte i = 16; i > remainder; i--) {
+      lines += " ";
+    }
+  }
+  telegram = "aA";
+  telegram += IBIS_vdvHex(address);
+  telegram += IBIS_vdvHex(numBlocks);
+  telegram += lines;
+  IBIS_sendTelegram(telegram);
+}
+