/// <summary>
/// 2 bytes Id (uint16)
/// 2 bytes for content length (uint16)
/// 1 byte for read/write mode (0=Read)
/// 2 bytes for the variable name length (uint16)
/// N bytes for the variable name to be read (ASCII)
/// </summary>
/// <param name="varName"></param>
/// <param name="outputString"></param>
/// <returns></returns>
private static byte[] ReadMessageRequest(string varName, out string outputString)
{
Random rnd = new Random();
string id = (rnd.Next(0, 99)).ToString("X2"); // 2Bytes Id (uint16)
string contentLength = (varName.Length + 3).ToString("X2");; //2 bytes contentLength (uint16)
string mode = "0"; //1 byte for read/write format
string nameLength = varName.Length.ToString("X2"); //2 bytes for the variable name length
outputString = id + contentLength + mode + nameLength + varName;
MessageSendFormat readRequest = new MessageSendFormat(id, contentLength, mode, nameLength, varName);
return(readRequest.messageReady);
}
/// <summary>
/// 2 bytes Id (uint16)
/// 2 bytes for content length (uint16)
/// 1 byte for read/write mode (1=Write)
/// 2 bytes for the variable name length (uint16)
/// N bytes for the variable name to be written (ASCII)
/// 2 bytes for the variable value length (uint16)
/// M bytes for the variable value to be written (ASCII)
/// </summary>
/// <param name="varName"></param>
/// <param name="varValue"></param>
/// <param name="outputString"></param>
/// <returns></returns>
private static byte[] WriteMessageRequest(string varName, string varValue, out string outputString)
{
Random rnd = new Random();
string messageId = (rnd.Next(0, 99)).ToString("X2"); //2 bytes for id
string reqLength = (varName.Length + varValue.Length + 5).ToString("X2"); //2 bytes for content length
string functionType = "1"; //1 byte for write mode
string varNameLength = varName.Length.ToString("X2"); //2 bytes for variable name length
//N bytes for variable name to be written
string varValueLength = varValue.Length.ToString("X2"); //2 bytes for the variable value length.
//N bytes for the variable value to be written.
outputString = messageId + reqLength + functionType + varNameLength + varName + varValueLength + varValue;
MessageSendFormat readRequest = new MessageSendFormat(messageId, reqLength, functionType, varNameLength, varName, varValueLength, varValue);
return(readRequest.messageReady);
}
