koobas.hobune.stream
Send many ints from Unity To Arduino.
Hi Guys,
I'm trying to send many ints to my "masterArduino". Because the SerialPort object only send strings. I've tried many things including: - Creating a string from ints ( didn't work because the size of the string.length is dynamic). - Then i tried to convert these ints to chars, this because all values are between 0-255, then put the char into a string and send it.
This sort of works. However i think there is no value for 0 in char world. So the data is not right. But there must be a better way?
void sendInfo()
{
for (var i = 0; i < peltiers.Length; i++)
{
char tempHot = (char) peltiers[i].GetComponent<Peltier>().hot;
char charTemp = (char) peltiers[i].GetComponent<Peltier>().temp;
peltierInfo += tempHot.ToString();
peltierInfo += charTemp.ToString();
}
sp.WriteLine(peltierInfo);
Debug.Log(peltierInfo);
sp.BaseStream.Flush();
peltierInfo = "";
}
Any help would be greatly appreciated! Thanks!
Arduino Code:
void loop() {
int serialIndex = 0;
int i2cIndex = 0;
while (0 < Serial.available()) { // loop through all the received bytes
char bufferByte = 0;
bufferByte = Serial.read();
serialBuffer[serialIndex] = (byte) bufferByte; // put current index byte in array
serialIndex ++; // add index.
if(serialIndex%12==0 && serialIndex != 0){
sendBytes(0);
}
}
//sendBytes(0);
delay(50);
}
void sendBytes(int slave){
byte i2cBuffer[12];
int bufferIndex = slave * 12;
for(int i = 0; i < 12; i++){
i2cBuffer[i] = serialBuffer[i + bufferIndex];
}
Wire.beginTransmission(slave+1);
Wire.write(i2cBuffer, 12);
Wire.endTransmission();
}
Try using Int.ToString("D5") or something similar. This forces the number to be displayed with 5 digits. So 345.ToString("D7") returns 0000345. Now just split the received string into segments of 7 or how many digits you need (3 in the case of 0-255) on the arduino side and cast them to Ints!
Good luck!
-Gameplay4all
This was the answer i didn't knew i was looking for! Thanks a bunch, the communication works like a charm now! :).
Hi, one way to convert binary information to a string is use Base64 encoding, it was designed exactly for that (and to minimize size too).
Check "System.Convert.ToBase64String()" and "System.Convert.FromBase64String()". I don't know what kind of environment you have on Arduino side, but Base64 encoding/decoding is quite standard in many languages/libraries.
