private void SensorInit(string Id, string State, string Description, float PingInterval)
{
this.Id = Id;
this.State = (StateEnum)Enum.Parse(typeof(StateEnum), State);
this.Description = (Description == null) ? "(None)" : Description;
this.PingInterval = PingInterval;
this.LastMsgSent = null;
this.LastReading = -1;
this.LastReadingTime = string.Empty; // Default Date value, meaning uninitialized
}
private void SensorInit(string Id, string state, string Desc, float PingInterval)
{
if (Id.Length > Sensor.IdLength)
{
MessageBox.Show("Sensor ID length cannot be greater than " + Sensor.IdLength,
"SensorEmulator",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
this.Id = Id.PadLeft(Sensor.IdLength, ' ');
this.State = (StateEnum)Enum.Parse(typeof(StateEnum), state);
this.Desc = (Desc == null) ? "(None)" : Desc;
this.PingInterval = (PingInterval < 0) ? 5 : PingInterval; // Default ping period of 5 min
this.NextExpectedMsg = SensorMsg.CommandTag.None;
this.LastMsgSent = null;
this.LastReading = -1;
this.LastReadingTime = DateTime.MinValue; // Default date value, meaning uninitialized
this.CalibParameters = new CalibData();
}
// copy constructor
public SensorMsg(SensorMsg sensorMsg)
{
this.SenderId = sensorMsg.SenderId;
this.Date = sensorMsg.Date;
this.Time = sensorMsg.Time;
this.Tag = sensorMsg.Tag;
this.Length = sensorMsg.Length;
this.Value = sensorMsg.Value;
}
private Result WritePacket(SensorMsg msg)
{
try
{
byte[] byteArr = new byte[1 + 1 + Sensor.IdLength + 1 + 1 + msg.Length + 1];
int idx = 0;
byteArr[idx++] = Preamble1; // Preamble 1
byteArr[idx++] = Preamble2; // Preamble 2
for (int i = 0; i < msg.SenderId.Length; i++)
{
byteArr[idx++] = Convert.ToByte(msg.SenderId[i]); // ID of sensor
}
byteArr[idx++] = (byte)msg.Tag; // Tag
byteArr[idx++] = (byte)(msg.Length * 2); // Length - Actual length is twice the length of the byte array
// coz its encoded as a hex string
for (int i = 0; i < msg.Length; i++)
{
byteArr[idx++] = msg.Value[i]; // Value
}
byteArr[idx++] = Epilog; // Epilog
string hexStr = Util.ByteArrToHex(byteArr);
SPort.Write(hexStr);
prevSensorMsg = msg;
return Result.Success;
}
catch (Exception exc)
{
MessageBox.Show(exc.Message,
"SensorEmulator",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
return Result.Failure;
}
}
/// <summary>
/// It processes any message received from any
/// sensor. This function must be called by the derived classes
/// of this class upon receiving a complete message packet from
/// a sensor
/// </summary>
/// <param name="sensorMsg">Message packet from sensor</param>
private void ProcessMessage(SensorMsg sensorMsg)
{
LoggerEnterMethod();
ServerMsg nextServerMsg;
string Id = sensorMsg.SenderId;
switch (sensorMsg.Tag)
{
case SensorMsg.CommandTag.Log:
{
float reading = Util.ByteArrToFloat(sensorMsg.Value) * Conf.SENSOR_READING_TO_RAINFALL_FACTOR;
LoggerInfo("RECEIVED Rainfall measurement = " + reading + " from Sensor " + Id + " at " + sensorMsg.Date + ", " + sensorMsg.Time);
/* Check if the sensor is already known or not.
* If not, add it to the list of known sensors and
* ask for its description
*/
if (KnownSensors.ContainsKey(Id) == false)
{
KnownSensors.Add(Id, new Sensor(Id));
AddToListKnownSensors(Id);
LoggerInfo("ADDED Sensor " + Id);
nextServerMsg = new ServerMsg();
nextServerMsg.RecipientId = Id;
nextServerMsg.Tag = ServerMsg.CommandTag.SendDescription;
nextServerMsg.Length = 0;
nextServerMsg.Value = null;
WritePacket(nextServerMsg);
}
// Save the last reading of the sensor
KnownSensors[Id].LastReading = reading;
KnownSensors[Id].LastReadingTime = sensorMsg.Date + " " + sensorMsg.Time;
SaveSensorInfo(Id);
// Logging the reading in the appropriate log file
string path = frmOptions.RainfallLogDirPath + "/" + Id + "/" + Id + "_" + KnownSensors[Id].LastReadingTime.Split(new char[] { ' ' })[0].Replace('/', '-') + ".csv";
string dir = Path.GetDirectoryName(path);
if (Directory.Exists(dir) == false)
Directory.CreateDirectory(dir);
LoggerLog(path,
KnownSensors[Id].LastReadingTime.Split(new char[] { ' ' })[1],
String.Format("{0:" + Logging.SENSOR_LOG_READING_FORMAT + "}", KnownSensors[Id].LastReading));
break;
}
case SensorMsg.CommandTag.Description:
{
string desc = Util.ByteArrToString(sensorMsg.Value);
LoggerInfo("RECEIVED Description = " + desc + " from Sensor " + Id);
KnownSensors[Id].Description = desc;
SaveSensorInfo(Id);
break;
}
case SensorMsg.CommandTag.Resend:
{
LoggerInfo("RECEIVED Resend from Sensor " + Id);
WritePacket(prevServerMsg[Id]);
break;
}
case SensorMsg.CommandTag.DebugMsg:
{
string dm = Util.ByteArrToString(sensorMsg.Value);
LoggerInfo("RECEIVED Debug Message = " + dm + " from Sensor " + Id);
break;
}
case SensorMsg.CommandTag.PingInterval:
{
float pingInterval = Util.ByteArrToFloat(sensorMsg.Value);
LoggerInfo("RECEIVED PingInterval = " + pingInterval.ToString() + " s from Sensor " + Id);
KnownSensors[Id].PingInterval = pingInterval;
SaveSensorInfo(Id);
break;
}
case SensorMsg.CommandTag.State:
{
string state = Util.ByteArrToString(sensorMsg.Value);
LoggerInfo("RECEIVED State = " + state + " from Sensor " + Id);
KnownSensors[Id].State = (Sensor.StateEnum)Enum.Parse(typeof(Sensor.StateEnum), state);
SaveSensorInfo(Id);
break;
}
default:
{
LoggerError("Unhandled case " + sensorMsg.Tag.ToString());
#if DEBUG
MessageBox.Show("Unhandled case " + sensorMsg.Tag.ToString() + "\n" + Util.GetMethodNameAndLineNum(),
"SENSIT Server",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
#endif
break;
}
}
RefreshGuiSensorInfo();
// Remembering the previous message received from each sensor
KnownSensors[Id].LastMsgSent = sensorMsg;
LoggerLeaveMethod();
}
/// <summary>
/// This function processes any message received from any
/// sensor. This function must be called by the derived classes
/// of this class upon receiving a complete message packet from
/// a sensor
/// </summary>
/// <param name="serverMsg">Message packet from sensor</param>
private void ProcessMessage(ServerMsg serverMsg)
{
SensorMsg nextSensorMsg = new SensorMsg();
nextSensorMsg.SenderId = sensor.Id;
AddToTxtRX("--------------------\r\n");
switch (serverMsg.Tag)
{
case ServerMsg.CommandTag.SendDescription:
AddToTxtRX("SendDescription\r\n");
nextSensorMsg.Tag = SensorMsg.CommandTag.Description;
nextSensorMsg.Length = (byte)sensor.Desc.Length;
nextSensorMsg.Value = (new UTF8Encoding()).GetBytes(sensor.Desc);
WritePacket(nextSensorMsg);
break;
case ServerMsg.CommandTag.DebugMsg:
AddToTxtRX("DebugMsg\r\n");
AddToTxtRX(Util.ByteArrToString(serverMsg.Value) + "\r\n");
break;
case ServerMsg.CommandTag.Resend:
AddToTxtRX("Resend\r\n");
WritePacket(prevSensorMsg);
break;
case ServerMsg.CommandTag.ResetReading:
AddToTxtRX("ResetReading\r\n");
nextSensorMsg.Tag = SensorMsg.CommandTag.DoneResetReading;
nextSensorMsg.Length = 0;
nextSensorMsg.Value = null;
WritePacket(nextSensorMsg);
break;
case ServerMsg.CommandTag.SetPingInterval:
AddToTxtRX("SetPingTimePeriod\r\n");
float new_t = Util.ByteArrToFloat(serverMsg.Value);
AddToTxtRX(new_t.ToString()+"\r\n");
nextSensorMsg.Tag = SensorMsg.CommandTag.DoneSetPingInterval;
nextSensorMsg.Length = 4;
nextSensorMsg.Value = Util.FloatToByteArr(new_t);
WritePacket(nextSensorMsg);
break;
case ServerMsg.CommandTag.SetServerAddress:
AddToTxtRX("SetServerAddress\r\n");
string new_add = Util.ByteArrToString(serverMsg.Value);
AddToTxtRX(new_add + "\r\n");
break;
case ServerMsg.CommandTag.Sleep:
AddToTxtRX("Sleep\r\n");
nextSensorMsg.Tag = SensorMsg.CommandTag.DoneSleep;
nextSensorMsg.Length = 0;
nextSensorMsg.Value = null;
WritePacket(nextSensorMsg);
break;
case ServerMsg.CommandTag.WakeUp:
AddToTxtRX("WakeUp\r\n");
nextSensorMsg.Tag = SensorMsg.CommandTag.DoneWakeUp;
nextSensorMsg.Length = 0;
nextSensorMsg.Value = null;
WritePacket(nextSensorMsg);
break;
case ServerMsg.CommandTag.Calibrate:
AddToTxtRX("Calibrate\r\n");
calibParam.CalibDone = false;
calibParam.NumSamples = 0;
nextSensorMsg.Tag = SensorMsg.CommandTag.StartCalibration;
nextSensorMsg.Length = 0;
nextSensorMsg.Value = null;
WritePacket(nextSensorMsg);
break;
case ServerMsg.CommandTag.MinHeight:
AddToTxtRX("Min Height = " + Util.ByteArrToFloat(serverMsg.Value).ToString() + "\r\n");
calibParam.MinHeight = Util.ByteArrToFloat(serverMsg.Value);
nextSensorMsg.Tag = SensorMsg.CommandTag.DoneMinHeight;
nextSensorMsg.Length = 4;
nextSensorMsg.Value = serverMsg.Value;
WritePacket(nextSensorMsg);
break;
case ServerMsg.CommandTag.MaxHeight:
AddToTxtRX("Max Height = " + Util.ByteArrToFloat(serverMsg.Value).ToString() + "\r\n");
calibParam.MaxHeight = Util.ByteArrToFloat(serverMsg.Value);
nextSensorMsg.Tag = SensorMsg.CommandTag.DoneMaxHeight;
nextSensorMsg.Length = 4;
nextSensorMsg.Value = serverMsg.Value;
WritePacket(nextSensorMsg);
break;
case ServerMsg.CommandTag.Height:
AddToTxtRX("Height = " + Util.ByteArrToFloat(serverMsg.Value).ToString() + "\r\n");
ProcessCalibSample(Util.ByteArrToFloat(serverMsg.Value));
nextSensorMsg.Tag = SensorMsg.CommandTag.DoneHeight;
nextSensorMsg.Length = 4;
nextSensorMsg.Value = serverMsg.Value;
WritePacket(nextSensorMsg);
break;
case ServerMsg.CommandTag.CalibrationDone:
AddToTxtRX("Calibration Done\r\n");
CalibrateSensor(); // Calibrating the sensor with the collected data
nextSensorMsg.Tag = SensorMsg.CommandTag.DoneCalibration;
nextSensorMsg.Length = 0;
nextSensorMsg.Value = null;
WritePacket(nextSensorMsg);
break;
default:
MessageBox.Show("Unhandled case " + serverMsg.Tag.ToString(),
"Sensor Emulator",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
break;
}
}
private void btnStart_Click(object sender, EventArgs e)
{
SensorMsg msg = new SensorMsg();
msg.SenderId = sensor.Id;
msg.Tag = SensorMsg.CommandTag.StartCalibration;
msg.Length = 0;
msg.Value = null;
WritePacket(msg);
}
private void btnSendDesc_Click(object sender, EventArgs e)
{
SensorMsg msg = new SensorMsg();
msg.SenderId = sensor.Id;
msg.Tag = SensorMsg.CommandTag.Description;
string desc = this.txtDesc.Text;
msg.Length = (byte)desc.Length;
msg.Value = (new UTF8Encoding()).GetBytes(desc);
WritePacket(msg);
}
private void btnLog_Click(object sender, EventArgs e)
{
SensorMsg msg = new SensorMsg();
if (sensor != null && SPort.IsOpen && sensor.State == Sensor.StateEnum.Logging)
{
msg.SenderId = sensor.Id;
msg.Tag = SensorMsg.CommandTag.Log;
msg.Length = 4;
msg.Value = BitConverter.GetBytes(Convert.ToSingle(this.txtCurrM.Text));
WritePacket(msg);
float rm = (float)rand.NextDouble() * 2;
this.txtCurrM.Text = rm.ToString();
}
}
private void ProcessNewSMSs()
{
LoggerEnterMethod();
LoggerInfo("Locking ProcessSMS... " + Util.GetMethodNameAndLineNum());
lock (ProcessSMSLock) // This function should not be run simultaneously from multiple threads and hence the lock
{
LoggerInfo("Locked ProcessSMS... " + Util.GetMethodNameAndLineNum());
PingGSMInTimer = false;
LoggerInfo("Disabled pinging GSM module");
// Reading unprocessed SMSs
try
{
// Dictionary mapping SMS index to the SMS message
Dictionary<string, SensorMsg> smsDict = new Dictionary<string, SensorMsg>();
List<string> lines = new List<string>();
string ln = string.Empty;
LoggerInfo("Locking SPort... " + Util.GetMethodNameAndLineNum());
lock (SPortLock)
{
LoggerInfo("Locked SPort... " + Util.GetMethodNameAndLineNum());
int sPortTimeout = SPort.ReadTimeout;
SPort.ReadTimeout = 5000;
SerialPortWrite("AT+CMGF=1\r");
SerialPortReadTo("OK\r");
SPort.ReadTimeout = sPortTimeout;
SerialPortWrite("AT+CMGL=\"ALL\"\r");
while (true)
{
ln = SerialPortReadLine();
if (ln != null && ln.Equals("OK\r") == false)
lines.Add(ln);
else
break;
}
}
LoggerInfo("Released SPort... " + Util.GetMethodNameAndLineNum());
bool msgfound = false;
string smsIndex = string.Empty;
SensorMsg sm = null;
foreach (string line in lines)
{
if (msgfound)
{
bool msgIsFromSensor = true;
string msg = line.Trim(new char[] { '\r' });
byte[] bmsg = null;
try
{
bmsg = Util.HexToByteArr(msg);
sm.Tag = (SensorMsg.CommandTag)bmsg[0];
}
catch (Exception exc)
{
LoggerWarning("Either the message is not hex coded or the tag is not defined, " +
"meaning that the message is not received from any SENSIT sensor. " +
"Exception: " + exc.Message);
msgIsFromSensor = false;
}
if (msgIsFromSensor)
{
sm.Length = (byte)((int)bmsg[1] / 2);
if (sm.Length * 2 + 2 * 2 != msg.Length)
msgIsFromSensor = false; // TLV packet inconsistency
else
{
sm.Value = new byte[sm.Length];
for (int i = 0; i < sm.Length; ++i)
sm.Value[i] = bmsg[i + 2];
}
}
// If the message is not from a SENSIT sensor, discarding the message
smsDict.Add(smsIndex, msgIsFromSensor ? sm : null);
msgfound = false;
}
if (line.StartsWith("+CMGL:"))
{
string[] tokens = line.Split(new char[] { ',', '"', '\r', ' ' });
int idx = 0;
while (tokens[idx].Length == 0) ++idx;
++idx; // Ignore "+CMGL:"
while (tokens[idx].Length == 0) ++idx;
smsIndex = tokens[idx]; // SMS index
++idx;
while (tokens[idx].Length == 0) ++idx;
++idx; // Ignore "REC"/"STO"
while (tokens[idx].Length == 0) ++idx;
++idx; // Ignore "UNREAD"/"READ"/"UNSENT"/"SENT"
while (tokens[idx].Length == 0) ++idx;
sm = new SensorMsg();
sm.SenderId = tokens[idx]; // Sender's number
++idx;
while (tokens[idx].Length == 0) ++idx;
sm.Date = tokens[idx]; // Date
++idx;
while (tokens[idx].Length == 0) ++idx;
sm.Time = tokens[idx]; // Time
msgfound = true;
}
}
#region Processing all the sensor messages received here
foreach (KeyValuePair<string, SensorMsg> pair in smsDict)
{
if (pair.Value != null)
ProcessMessage(pair.Value);
// Once the message has been processed, it is deleted from the sim card
try
{
LoggerInfo("Locking SPort... " + Util.GetMethodNameAndLineNum());
lock (SPortLock)
{
LoggerInfo("Locked SPort... " + Util.GetMethodNameAndLineNum());
SerialPortWrite("AT+CMGD=" + pair.Key + "\r");
SerialPortReadTo("OK\r");
}
LoggerInfo("Released SPort... " + Util.GetMethodNameAndLineNum());
}
catch (TimeoutException exc)
{
LoggerError("GSM module failed to respond : " + exc.Message);
#if DEBUG
MessageBox.Show("GSM module not responding" + "\n" + exc.Message + "\n" + Util.GetMethodNameAndLineNum(),
"SENSIT Server",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
#endif
}
}
#endregion
}
catch (TimeoutException exc)
{
LoggerError("GSM module failed to respond");
#if DEBUG
MessageBox.Show("GSM module not responding" + "\n" + exc.Message + "\n" + Util.GetMethodNameAndLineNum(),
"SENSIT Server",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
#endif
}
PingGSMInTimer = true;
LoggerInfo("Enabled pinging GSM module");
}
LoggerInfo("Released ProcessSMS... " + Util.GetMethodNameAndLineNum());
LoggerLeaveMethod();
}
