diff --git a/README.md b/README.md
index 564d38a..1d1fd18 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,38 @@
 # SHOH-Innovation-Project
 Smart Home Oil Heater is a project for Metropolia UAS course called Multidisciplinary Innovation Project.
+
+Tasks communication:
+
+Rotary: gets rotation dir --- Master --- Temp Task: gets temp
+                                |
+                                |
+                                |
+                                |
+                                |
+Menu Task ------------------------------------------- Heater Task
+
+
+
+
+common struct:
+
+typedef struct {
+  int8_t temp_real;
+} sensor_temp ;
+
+typedef struct {
+  bool right;
+  bool press;
+} rotary_action ;
+
+typedef struct {
+  int8_t set_point;
+} user_settings;
+
+
+common struct communication diagram:
+
+- sensor_temp  (Temp Task --> Master --> Menu && Heater)
+- rotary_action (Rotary --> Master --> Menu Task)
+- user_settings (Menu --> Master --> Heater)
+