diff --git a/README.md b/README.md
index 150b45a..64566ab 100644
--- a/README.md
+++ b/README.md
@@ -14,9 +14,11 @@ Here's some code and schematic to connect your mightyohm.com geiger counter to t
 
 ![Schematic](https://raw.githubusercontent.com/schinken/esp8266-geigercounter/master/images/schematic.png "How to connect")
 
+*You can optionally connect PULSE to D2 of the Wemos D1 and enable PIN_PULSE to receive a mqtt event each count!*
+
 ## images
 
-<p float="left">
+<p align="middle">
 <img src="https://raw.githubusercontent.com/schinken/esp8266-geigercounter/master/images/img-1.jpg" width="32%">
 <img src="https://raw.githubusercontent.com/schinken/esp8266-geigercounter/master/images/img-2.jpg" width="32%">
 <img src="https://raw.githubusercontent.com/schinken/esp8266-geigercounter/master/images/img-3.jpg" width="32%">
diff --git a/esp8266-geigercounter.ino b/esp8266-geigercounter.ino
index 79f7d91..b8ca47e 100644
--- a/esp8266-geigercounter.ino
+++ b/esp8266-geigercounter.ino
@@ -45,6 +45,7 @@ void setup() {
  
   mqttClient.setClient(wifiClient);
   mqttClient.setServer(MQTT_HOST, 1883);
+  connectMqtt();
 
   #ifdef OTA_PASSWORD
     ArduinoOTA.setHostname(hostname);
@@ -52,8 +53,18 @@ void setup() {
     ArduinoOTA.begin();
   #endif
 
+  #ifdef PIN_PULSE
+    pinMode(PIN_PULSE, INPUT);
+    attachInterrupt(PIN_PULSE, onPulse, RISING);
+  #endif
 }
 
+#ifdef PIN_PULSE
+ICACHE_RAM_ATTR void onPulse() {
+  mqttClient.publish(MQTT_TOPIC_PULSE, "true");
+}
+#endif
+
 void publishValues() {
   char tmp[8];
 
diff --git a/images/schematic.png b/images/schematic.png
index d333548..5306489 100644
Binary files a/images/schematic.png and b/images/schematic.png differ
diff --git a/settings.h.example b/settings.h.example
index fca35a6..8d6315c 100644
--- a/settings.h.example
+++ b/settings.h.example
@@ -8,6 +8,7 @@
 
 #define PIN_UART_RX D1 // 4
 #define PIN_UART_TX 13 // UNUSED
+//#define PIN_PULSE D2
 
 #define BAUD_GEIGERCOUNTER 9600
 
@@ -22,6 +23,7 @@
 #define MQTT_TOPIC_CPM "sensor/geigercounter/cpm"
 #define MQTT_TOPIC_USV "sensor/geigercounter/uSv"
 #define MQTT_TOPIC_LAST_WILL "sensor/geigercounter/status"
+#define MQTT_TOPIC_PULSE "sensor/geigercounter/pulse"
 
 // Only publishes values if changed since last publish
 #define MQTT_PUBLISH_INTERVAL_MS (10 * 1000)
\ No newline at end of file