Ok guys, i've a pressure from a NodeMCU bmp180 with ip 192.168.0.51 and virtual node N5S0.
I'm not a programmer, and i'm trying to make a working automation to valorize another virtual node (set as Sensor.Distance) N7S0.
Operation for calculate altitude is : (pressure - 101325)*843/10000
I've tried this code reading pressure from IP and valorizing virtual node :
const String ESP8266_IP_ADDRESS = "192.168.0.51";
const String NODE_ADDRESS = "N7S0";
/*
This code is running one time when program is enabled
*/
public void Setup()
{
}
/*
This code is running periodicaly when program is enabled.
Cron job detirmine running period.
*/
public void Run()
{
Altitude = (QueryServer("GETPRESSURE")- 101325)*843/10000;
String response = Altitude;
Console.WriteLine(response);
ModuleHelper.SetProperty("Virtual", NODE_ADDRESS, "Sensor.Distance", response.ToString());
EventHelper.SetEvent("Virtual", NODE_ADDRESS, "Sensor.Distance");
}
private static string QueryServer(String message)
{
try
{
Console.WriteLine("TCP client command: " + message + "\r\n");
Int32 port = 43333;
System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient( ESP8266_IP_ADDRESS, port);
Byte[] data = System.Text.Encoding.ASCII.GetBytes(message);
System.Net.Sockets.NetworkStream stream = client.GetStream();
stream.Write(data, 0, data.Length);
data = new Byte[256];
String responseData = String.Empty;
Int32 bytes = stream.Read(data, 0, data.Length);
responseData = System.Text.Encoding.ASCII.GetString(data, 0, bytes);
// Close everything.
stream.Close();
client.Close();
return responseData;
}
catch(Exception e)
{
Console.WriteLine(e.StackTrace + "\r\n");
}
return "0.00";
}
the response returned by "QueryServer(GETPRESSURE)" is of type "String", so when you call it, your variable "Altitude" contains a String object.
You can check that it contains value by using "console.WriteLine", good for debugging. For doing calculations, you need to convert this String value to a decimal Float value first... you cannot calculate with letters.
Again, you should check result of successful calculation with console.writeline function. Then to set module property, you need to convert this value back to String (using the ToString function), and to see your changes in GUI you also need to trigger an event AFAIK (at least when you use "SetProperty" then you also need "SetEvent", no idea if things are different with "processCommad")
