@benya
If I have two nodes (#1 and #2) and each has sensor with ID '21' and each node calls request(21, V_STATUS), which sensor values they will get from controller?
Node #1 will get his node_1/sensor_21 value and node #2 will get his node_2/sensor_21 value?
Yes, You can have any number of nodes with the same sensorId. When MyController receives a request from a node, it knows node Id too. node id will be added on behind the scene when you raise a request.