diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b005a81..4d3bbe9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -37,9 +37,7 @@ firmware-build:
     - pio run -t clean
     - pio run --environment basic
     - pio run --environment mesh
-    - pio run --environment meshPixel
     - pio run --environment meshMqttBridge
-    - pio run --environment ota
   artifacts:
     paths:
       - .pioenvs/*/firmware.*
diff --git a/platformio.ini b/platformio.ini
index 5124119..7a26082 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -22,6 +22,8 @@ lib_deps =
     ESPAsyncTCP
     TaskScheduler
     SPIFFS
+    ESP8266mDNS
+    ArduinoOTA
     
 ;[env:build]
 ;src_filter = +<*> -<examples/>
@@ -68,17 +70,4 @@ monitor_baud = ${common.monitor_baud}
 framework = ${common.framework}
 lib_deps = ${common.lib_deps}
     painlessMesh
-    PubSubClient
-
-[env:ota]
-src_filter = +<*> +<*/plugins/*> -<examples/> +<examples/ota/>
-platform = espressif8266
-board = esp12e
-upload_speed = ${common.upload_speed}
-upload_flags = --auth=f4ncy
-monitor_baud = ${common.monitor_baud}
-framework = ${common.framework}
-lib_deps = ${common.lib_deps}
-    ESP8266mDNS
-    painlessMesh
-    ArduinoOTA
\ No newline at end of file
+    PubSubClient
\ No newline at end of file
diff --git a/src/Mediator.h b/src/Mediator.h
new file mode 100644
index 0000000..88f6d68
--- /dev/null
+++ b/src/Mediator.h
@@ -0,0 +1,31 @@
+#ifndef __MEDIATOR__
+#define __MEDIATOR__
+
+#include <Arduino.h>
+#include <ArduinoJson.h>
+#include <list>
+#include <functional>
+#include <map>
+#include <vector>
+
+using namespace std;
+
+typedef std::function<void(String msg)> subscriptionHandler_t;
+
+class Mediator {
+    public:
+        std::map<std::string, vector<subscriptionHandler_t>> subscriptions;
+        void subscribe(String topic, subscriptionHandler_t handler) {
+            subscriptions[topic.c_str()].reserve(1);
+            subscriptions[topic.c_str()].push_back(handler);
+        }
+        void publish(String topic, String msg) {
+            if (subscriptions.find(topic.c_str()) != subscriptions.end()){
+                for(subscriptionHandler_t h : subscriptions[topic.c_str()]){
+                    h(msg);
+                }
+            }
+        }
+};
+
+#endif
\ No newline at end of file
diff --git a/src/MeshNet.cpp b/src/MeshNet.cpp
index 2160e6f..f691e7f 100644
--- a/src/MeshNet.cpp
+++ b/src/MeshNet.cpp
@@ -32,7 +32,7 @@ Network* MeshNet::init(){
 Network* MeshNet::connectStation(int doConnect) {
     if(doConnect){
         Serial.println("connect station");
-        mesh.stationManual(config.stationSSID, config.stationPassword);
+        mesh.stationManual(config.stationSSID, config.stationPassword, 5555, IPAddress(192,168,1,142));
         mesh.setHostname(config.hostname.c_str());
     }
     return this;
diff --git a/src/Plugin.h b/src/Plugin.h
index a8791ae..bce5744 100644
--- a/src/Plugin.h
+++ b/src/Plugin.h
@@ -3,14 +3,26 @@
 
 #include <TaskSchedulerDeclarations.h>
 #include <Network.h>
-#include <base/MeshMessage.h>
+#include <base/SprocketMessage.h>
+#include <Mediator.h>
 
 class Plugin {
     public:
+        Mediator* mediator;
         virtual void activate(Scheduler*, Network*);
         virtual void enable(){};
         virtual void disable(){};
-        virtual void onMessage(MeshMessage msg){};
+        virtual void onMessage(SprocketMessage msg){};
+        Plugin* mediate(Mediator* m) {
+            mediator = m;
+            return this;
+        }
+        void subscribe(String topic, subscriptionHandler_t handler){
+            mediator->subscribe(topic, handler);
+        }
+        void publish(String topic, String str){
+            mediator->publish(topic, str);
+        }
 };
 
 #endif
\ No newline at end of file
diff --git a/src/Sprocket.cpp b/src/Sprocket.cpp
index a19110c..cd1b84d 100644
--- a/src/Sprocket.cpp
+++ b/src/Sprocket.cpp
@@ -43,13 +43,15 @@ void Sprocket::loop(){
 }
 
 void Sprocket::dispatch( uint32_t from, String &msg ) {
-    MeshMessage mMsg;
-    if(mMsg.fromJsonString(msg)){
+    SprocketMessage mMsg;
+    mMsg.fromJsonString(msg);
+    if(mMsg.valid){
         dispatchMessageToPlugins(mMsg);
     }
 }
 
 void Sprocket::addPlugin(Plugin* p){
+    p->mediate(this);
     plugins.reserve(1);
     plugins.push_back(p);
 }
@@ -60,10 +62,11 @@ void Sprocket::activatePlugins(Scheduler* scheduler, Network* network){
     }
 }
 
-void Sprocket::dispatchMessageToPlugins(MeshMessage msg){
-    if(msg.type != MeshMessage::NONE){ // baaaa
+// TODO remove plugin dispatching  and onMessage in favor of mediator pub/sub
+void Sprocket::dispatchMessageToPlugins(SprocketMessage msg){
+    if(msg.type != SprocketMessage::NONE){ // baaaa
         for(Plugin* p : plugins){
-            Serial.println("dispatch to plugins");
+            //Serial.println("dispatch to plugins");
             p->onMessage(msg);
         }
     }
diff --git a/src/Sprocket.h b/src/Sprocket.h
index 676facc..d13b4b7 100644
--- a/src/Sprocket.h
+++ b/src/Sprocket.h
@@ -18,7 +18,7 @@ using namespace std::placeholders;
 // FIXME move to some global fnc lib
 #define ARRAY_LENGTH(array) sizeof(array)/sizeof(array[0])
 
-class Sprocket {
+class Sprocket : public Mediator {
     protected:
         Scheduler scheduler;
     public:
@@ -37,7 +37,7 @@ class Sprocket {
 
         void addPlugin(Plugin* p);
         void activatePlugins(Scheduler* scheduler, Network* network);
-        void dispatchMessageToPlugins(MeshMessage msg);
+        void dispatchMessageToPlugins(SprocketMessage msg);
 };
 
 #endif
\ No newline at end of file
diff --git a/src/base/MeshMessage.h b/src/base/MeshMessage.h
deleted file mode 100644
index 8d5b080..0000000
--- a/src/base/MeshMessage.h
+++ /dev/null
@@ -1,81 +0,0 @@
-#ifndef __MESH_MESSAGE__
-#define __MESH_MESSAGE__
-
-#include <Arduino.h>
-#include <ArduinoJson.h>
-
-#define JSON_DOMAIN "domain"
-#define JSON_FROM "from"
-#define JSON_TO "target"
-#define JSON_MSG "msg"
-#define JSON_TYPE "type"
-
-struct MeshMessage {
-    String domain;
-    String to;
-    String from;
-    String msg;
-    enum MeshMessageType { NONE, SYSTEM, APP, OTA } type;
-    int valid = 0;
-    // ------------------------------------------------------------------------------------------
-    //void init() {
-    //    from =  reinterpret_cast<char*>(ESP.getChipId());
-    //}
-    int verifyJsonObject(JsonObject& json){
-        return json.success();
-            //&& json.containsKey(JSON_DOMAIN)
-            //&& json.containsKey(JSON_TO)
-            //&& json.containsKey(JSON_FROM)
-            //&& json.containsKey(JSON_TYPE)
-            // && json.containsKey(JSON_MSG); // msg is only tx'ed from mqtt
-    };
-    String toJsonString(){
-        //StaticJsonBuffer<200> jsonBuffer;
-        DynamicJsonBuffer jsonBuffer(JSON_ARRAY_SIZE(300));
-        JsonObject& root = jsonBuffer.createObject();
-        root[JSON_DOMAIN] = domain;
-        root[JSON_TO] = to;
-        root[JSON_FROM] = from;
-        root[JSON_MSG] = msg;
-        root[JSON_TYPE] = type;
-        String jsonString;
-        root.printTo(jsonString);
-        return jsonString;
-    }
-    String getAttrFromJson(JsonObject& json, const char* attr){
-        if(json.containsKey(attr)){
-            return json[attr];
-        }
-        return "";
-    }
-    int getIntAttrFromJson(JsonObject& json, const char* attr){
-        if(json.containsKey(attr)){
-            return json[attr];
-        }
-        return 0;
-    }
-    // Map a json object to this struct.
-    int fromJsonObject(JsonObject& json){
-        if(!verifyJsonObject(json)){
-            Serial.println("ERROR: cannot parse MeshMessage JSON object");
-            valid = 0;
-            return valid;
-        }
-        domain = getAttrFromJson(json, JSON_DOMAIN);
-        to = getAttrFromJson(json, JSON_TO);
-        from = getAttrFromJson(json, JSON_FROM);
-        msg = getAttrFromJson(json, JSON_MSG);
-        type = (MeshMessageType) getIntAttrFromJson(json, JSON_TYPE);
-        valid = 1;
-        return valid;
-    };
-    // Parse a json string and map parsed object
-    int fromJsonString(String& str){
-        //StaticJsonBuffer<200> jsonBuffer;
-        DynamicJsonBuffer jsonBuffer(JSON_ARRAY_SIZE(300));
-        JsonObject& json = jsonBuffer.parseObject(str);
-        return fromJsonObject(json);
-    };
-};
-
-#endif
\ No newline at end of file
diff --git a/src/base/MeshSprocket.h b/src/base/MeshSprocket.h
index 908ac15..7d9212f 100644
--- a/src/base/MeshSprocket.h
+++ b/src/base/MeshSprocket.h
@@ -6,7 +6,7 @@
 #include <painlessMesh.h>
 #include <Sprocket.h>
 #include <MeshNet.h>
-#include <base/MeshMessage.h>
+#include <base/SprocketMessage.h>
 #include <base/MeshSprocketConfig.h>
 #include "config.h"
 #include "utils_print.h"
@@ -18,6 +18,7 @@ class MeshSprocket : public Sprocket {
     public:
         MeshNet* net;
 
+        MeshSprocket(){};
         MeshSprocket(SprocketConfig cfg) : Sprocket(cfg) {
 
         }
@@ -30,13 +31,13 @@ class MeshSprocket : public Sprocket {
             return this;
         } using Sprocket::activate;
 
-        virtual void onMessage(uint32_t from, String &msg) {
-            Serial.printf("MeshSprocket onMessage: received from %u msg=%s\n", from, msg.c_str());
-        };
-
         void dispatch( uint32_t from, String &msg ) {
-            Sprocket::dispatch(from, msg);
-            onMessage(from, msg);
+           SprocketMessage sMsg;
+            sMsg.fromJsonString(msg);
+            if(sMsg.valid){
+                sMsg.from = from;
+                publish(sMsg.topic, sMsg.payload);
+            }
         }
 
         void loop() {
diff --git a/src/base/SprocketMessage.h b/src/base/SprocketMessage.h
new file mode 100644
index 0000000..e4ebeee
--- /dev/null
+++ b/src/base/SprocketMessage.h
@@ -0,0 +1,59 @@
+#ifndef __MESH_MESSAGE__
+#define __MESH_MESSAGE__
+
+#include <Arduino.h>
+#include <ArduinoJson.h>
+#include <JsonStruct.h>
+
+#define JSON_DOMAIN "domain"
+#define JSON_FROM "from"
+#define JSON_TO "target"
+#define JSON_PAYLOAD "payload"
+#define JSON_TYPE "type"
+#define JSON_TOPIC "topic"
+
+struct SprocketMessage : public JsonStruct {
+    String domain;
+    String to;
+    String from;
+    String payload;
+    String topic;
+
+    // TODO do we even need that?
+    enum SprocketMessageType { NONE, SYSTEM, APP, OTA } type;
+    // ------------------------------------------------------------------------------------------
+    int verifyJsonObject(JsonObject& json){
+        return json.success()
+            //&& json.containsKey(JSON_DOMAIN)
+            //&& json.containsKey(JSON_TO)
+            //&& json.containsKey(JSON_FROM)
+            //&& json.containsKey(JSON_TYPE)
+            && json.containsKey(JSON_TOPIC)
+            && json.containsKey(JSON_PAYLOAD);
+    };
+    void mapJsonObject(JsonObject& root){
+        root[JSON_DOMAIN] = domain;
+        root[JSON_TO] = to;
+        root[JSON_FROM] = from;
+        root[JSON_PAYLOAD] = payload;
+        root[JSON_TOPIC] = topic;
+        root[JSON_TYPE] = type;
+    }
+    // Map a json object to this struct.
+    void fromJsonObject(JsonObject& json){
+        if(!verifyJsonObject(json)){
+            Serial.println("ERROR: cannot parse SprocketMessage JSON object");
+            valid = 0;
+            return;
+        }
+        domain = getAttrFromJson(json, JSON_DOMAIN);
+        to = getAttrFromJson(json, JSON_TO);
+        from = getAttrFromJson(json, JSON_FROM);
+        payload = getAttrFromJson(json, JSON_PAYLOAD);
+        topic = getAttrFromJson(json, JSON_TOPIC);
+        type = (SprocketMessageType) getIntAttrFromJson(json, JSON_TYPE);
+        valid = 1;
+    };
+};
+
+#endif
\ No newline at end of file
diff --git a/src/examples/mesh/MeshApp.h b/src/examples/mesh/MeshApp.h
index 77cb146..d7cbec7 100644
--- a/src/examples/mesh/MeshApp.h
+++ b/src/examples/mesh/MeshApp.h
@@ -9,6 +9,7 @@
 #include <plugins/WebServerPlugin.cpp>
 #include <plugins/WebConfigPlugin.cpp>
 #include <plugins/MeshManPlugin.cpp>
+#include "Mediator.h"
 
 using namespace std;
 using namespace std::placeholders;
@@ -18,12 +19,13 @@ AsyncWebServer WEBSERVER(80);
 class MeshApp : public MeshSprocket {
     public:
         Task heartbeatTask;
-        
+
         MeshApp(SprocketConfig cfg, OtaConfig otaCfg, WebServerConfig webCfg) : MeshSprocket(cfg) {
             addPlugin(new OtaTcpPlugin(otaCfg));
             addPlugin(new WebServerPlugin(webCfg, &WEBSERVER));
             addPlugin(new WebConfigPlugin(&WEBSERVER));
             addPlugin(new MeshManPlugin(&WEBSERVER));
+            subscribe("mesh/heartbeat", bind(&MeshApp::messageHandler, this, _1));
         }
 
         Sprocket* activate(Scheduler* scheduler, Network* network) {
@@ -37,18 +39,25 @@ class MeshApp : public MeshSprocket {
             return this;
         } using MeshSprocket::activate;
 
+        void messageHandler(String msg){
+            Serial.println(String("MeshApp: ") + msg);
+        }
+
         void heartbeat(MeshNet* network){
-            MeshMessage msg; // = { "wirelos", "broadcast", "local", "alive", 0, };
+            SprocketMessage msg; // = { "wirelos", "broadcast", "local", "alive", 0, };
             msg.domain = "wirelos";
             msg.to = "broadcast";
-            msg.msg = "alive";
-            msg.type = MeshMessage::APP;
+            msg.payload = "alive";
+            msg.topic = "mesh/heartbeat";
+            msg.type = SprocketMessage::APP;
             String msgStr = msg.toJsonString();
-            network->mesh.sendBroadcast(msgStr/* , true */);
-        }
-        void onMessage( uint32_t from, String &msg ) {
-            Serial.printf("MeshApp onMessage: received from %u msg=%s\n", from, msg.c_str());
+            network->mesh.sendBroadcast(msgStr, true);
+            //String mMsg =  String("hoi");
+            //publish("mediatorMsg", "hi mediator");
         }
+        //void onMessage( uint32_t from, String &msg ) {
+        //    Serial.printf("MeshApp onMessage: received from %u msg=%s\n", from, msg.c_str());
+        //}
 };
 
 #endif
\ No newline at end of file
diff --git a/src/examples/ota/SprocketOTA.cpp b/src/examples/ota/SprocketOTA.cpp
deleted file mode 100644
index 8d110ab..0000000
--- a/src/examples/ota/SprocketOTA.cpp
+++ /dev/null
@@ -1,28 +0,0 @@
-#ifndef __MESH_APP__
-#define __MESH_APP__
-
-#define DEBUG_ESP_OTA
-#include <MeshNet.h>
-#include <base/MeshSprocket.h>
-#include "config.h"
-
-using namespace std;
-using namespace std::placeholders;
-
-// MeshSprocket base class integrates OTA plugin by default
-class SprocketOTA : public MeshSprocket {
-    public:
-        SprocketOTA(SprocketConfig cfg, OtaConfig otaCfg) : MeshSprocket(cfg, otaCfg) {}
-
-        Sprocket* activate(Scheduler* scheduler, Network* network) {
-            // call parent method that enables dispatching and plugins
-            MeshSprocket::activate(scheduler, network);
-            return this;
-        } using MeshSprocket::activate;
-
-        void onMessage( uint32_t from, String &msg ) {
-            Serial.printf("SprocketOTA onMessage: received from %u msg=%s\n", from, msg.c_str());
-        }
-};
-
-#endif
\ No newline at end of file
diff --git a/src/examples/ota/config.h b/src/examples/ota/config.h
deleted file mode 100644
index 86185cf..0000000
--- a/src/examples/ota/config.h
+++ /dev/null
@@ -1,27 +0,0 @@
-#ifndef __OTA_NODE__CONFIG__
-#define __OTA_NODE__CONFIG__
-
-// Scheduler config
-#define _TASK_SLEEP_ON_IDLE_RUN
-#define _TASK_STD_FUNCTION
-
-// Chip config
-#define SERIAL_BAUD_RATE    115200
-#define STARTUP_DELAY       3000
-
-// Mesh config
-#define STATION_MODE        1 // must be 1 => connected to a normal network to receive update
-#define WIFI_CHANNEL        11
-#define MESH_PORT           5555
-#define MESH_PREFIX         "whateverYouLike"
-#define MESH_PASSWORD       "somethingSneaky"
-#define STATION_SSID        "Th1ngs4P"
-#define STATION_PASSWORD    "th3r31sn0sp00n"
-#define HOSTNAME            "ota-node"
-#define MESH_DEBUG_TYPES    ERROR | STARTUP | CONNECTION
-
-// OTA config
-#define OTA_PORT 8266
-#define OTA_PASSWORD "f4ncy"
-
-#endif
\ No newline at end of file
diff --git a/src/examples/ota/main.cpp b/src/examples/ota/main.cpp
deleted file mode 100644
index 222a804..0000000
--- a/src/examples/ota/main.cpp
+++ /dev/null
@@ -1,25 +0,0 @@
-#include <ArduinoOTA.h>
-#include "config.h"
-#include "MeshNet.h"
-#include "SprocketOTA.cpp"
-
-MeshNet net({
-    STATION_MODE, WIFI_CHANNEL,
-    MESH_PORT, MESH_PREFIX, MESH_PASSWORD,
-    STATION_SSID, STATION_PASSWORD, HOSTNAME,
-    MESH_DEBUG_TYPES
-});
-
-SprocketOTA sprocket(
-    { STARTUP_DELAY, SERIAL_BAUD_RATE },
-    {OTA_PORT, OTA_PASSWORD}
-);
-
-void setup() {
-    sprocket.join(net);
-}
-
-void loop() {
-    sprocket.loop();
-    yield();
-}
\ No newline at end of file
diff --git a/src/plugins/MeshManPlugin.cpp b/src/plugins/MeshManPlugin.cpp
index 8b7b1f3..324907f 100644
--- a/src/plugins/MeshManPlugin.cpp
+++ b/src/plugins/MeshManPlugin.cpp
@@ -27,6 +27,11 @@ class MeshManPlugin : public Plugin {
             server->on("/mesh", HTTP_POST, std::bind(&MeshManPlugin::sendMsg, this, std::placeholders::_1));
             server->on("/mesh/nodeId", HTTP_GET, std::bind(&MeshManPlugin::getNodeId, this, std::placeholders::_1));
             server->on("/mesh/broadcast", HTTP_POST, std::bind(&MeshManPlugin::broadcast, this, std::placeholders::_1));
+
+            subscribe("mesh/heartbeat", std::bind(&MeshManPlugin::gotHeartbeat, this, std::placeholders::_1));
+        }
+        void gotHeartbeat(String msg){
+            Serial.println(String("MeshManPlugin / Heartbeat: ") + msg);
         }
         void getMeshConnections(AsyncWebServerRequest *request) {
             request->send(200, "text/plain", net->mesh.subConnectionJson());
diff --git a/src/plugins/OtaTcpPlugin.cpp b/src/plugins/OtaTcpPlugin.cpp
index affde58..aa49999 100644
--- a/src/plugins/OtaTcpPlugin.cpp
+++ b/src/plugins/OtaTcpPlugin.cpp
@@ -33,8 +33,8 @@ class OtaTcpPlugin : public Plugin {
             ArduinoOTA.begin();
             otaTask.enable();
         }
-        void onMessage(MeshMessage msg) {
-            if(msg.type == MeshMessage::OTA){
+        void onMessage(SprocketMessage msg) {
+            if(msg.type == SprocketMessage::OTA){
                 Serial.println("OTA msg received");
                 WiFi.disconnect();
                 net->mesh.stop();