public void SendPacket()
{
int checksum = 0;
if (PacketNum++ > 999)
{
PacketNum = 0;
}
//get all the data in string form
String num = PacketNum.ToString("D3");
String A0val = A0.ReadRaw().ToString("D4");
String A1val = A1.ReadRaw().ToString("D4");
String A2val = A2.ReadRaw().ToString("D4");
String A3val = A3.ReadRaw().ToString("D4");
String A4val = A4.ReadRaw().ToString("D4");
String A5val = A5.ReadRaw().ToString("D4");
char D0val = D0.Read() ? '1' : '0';
char D1val = D1.Read() ? '1' : '0';
char D2val = D2.Read() ? '1' : '0';
char D3val = D3.Read() ? '1' : '0';
char D4val = D4.Read() ? '1' : '0';
char D5val = D5.Read() ? '1' : '0';
char D6val = D6.Read() ? '1' : '0';
char D7val = D7.Read() ? '1' : '0';
char Btnval = Btn.Read() ? '1' : '0';
//concat the data
String packet = num + A0val + A1val + A2val + A3val + A4val + A5val + Btnval + D0val + D1val + D2val + D3val + D4val + D5val + D6val + D7val;
//compute checksum
foreach (char digit in packet)
{
checksum += (digit);
}
checksum %= 1000;
//append checksum and protocol frame stuff
packet = "###" + packet + checksum + "\r\n";
//convert to byte array for sending
byte[] bytepacket = System.Text.Encoding.UTF8.GetBytes(packet);
//send the packet
_serial.Write(bytepacket, 0, bytepacket.Length);
}
