Project Read weightscale data and send to cloud

Projects Programming
1

Hi there,

i am working on a project to get weight scale data from a serial port and save it to an online database.
I hav connected an weight scale indicator (industrial) to my Arduino Yun Mini.

What i have reached so far is that the Arduino is checking every 5 seconds if a bit is high in my online database. When it is, the arduino must read the data from the weight scale and should post it (through) a PHP script in my database.

Code:

#include <SoftwareSerial.h>
#include <Bridge.h>
#include <HttpClient.h>
#include <Console.h>

SoftwareSerial mySerial(10,11);
const byte numChars = 32;
char receivedChars[numChars];
boolean newData = false;

void setup()
{
  Bridge.begin();
  Serial.begin(9600);
  mySerial.begin(9600);
  pinMode(13, OUTPUT);
  digitalWrite(13, LOW);
}

void loop() {
  HttpClient client;
  String clientline;
  client.get("http://xxx.xxx.xxx/updateweight.php?eventtype=getStatus&indicator=AYM01");
  int _available = client.available();
  if (_available> 0) {
    clientline = client.readString();
  };
  clientline.trim();
  Serial.println(clientline);
  if(clientline=="1"){
    Serial.println("posting");
    
  HttpClient clientPost;
  String clientlinePost;
  String postValue;
  String postWeight;
  String postByte;
  String leesString;
  digitalWrite(13, HIGH);
  
  postValue = "http://xxx.xxx.xxx/updateweight.php?eventtype=postValue&indicator=AYM01&weightvalue=";
  //mySerial.write('READ');
  //mySerial.write(char(13)+char(10));
  delay(1000);
  while (mySerial.available() > 0) {
    //postWeight = mySerial.readString();
     // postByte = mySerial.readStringUntil('\r');
     // postWeight += postByte;
      //postWeight += mySerial.read();
      //char c = mySerial.read();  //gets one byte from serial buffer
      leesString += mySerial.read(); //makes the string readString
      leesString += ',';
  }

   postValue+=leesString;
  clientPost.get(postValue);
  
  int _available = clientPost.available();
  if (_available> 0) {
    clientlinePost = clientPost.readString();
  };
  clientlinePost.trim();
  //Serial.println(clientlinePost);
  if(clientlinePost=="OK"){
    clientPost.get("http://xxx.xxx.xxx/updateweight.php?eventtype=setStatus&indicator=AYM01");
    digitalWrite(13, LOW);
  };
  
  }
  
  Serial.flush();
  delay(5000);
}

The string i am getting saved in my DB is:

86,213,90,101,157,191,191,191,191,191,157,163

The weight scale is at 1kg. It is consequent data because when i request new data i get the same string. If i change the weight scale i will get another value.

The numbers cannot be related to the ASCII table. Does anyone has a clue what type of conversion i need in this stage?

I'am really a newby so don't mind kicking my ass :wink:

2

I'm sure that the documentation for your scale says something about the serial data that it sends.

3

Well, the documentation claimes that it returns a string value. I was wondering if the way i read the chars from the serial port must be converted to a readable string