SDI 12 script serial monitor issue

Projects General Guidance
1

Hi everyone,Im trying to make an arduino script that communicates with SDI 12 protocol and send data from a sensor to an mkr board and put the result in serial monitor.
.Im already using a level shifter turning 5 volts to 3.3v,the electrical part works.

When I run my script,I get all working but in my serial monitor for the M command I get 10012F or 10012lca.
I dont know why I get this F or lca, it should just be 10012 and then receive de data whenever is ready with the D command.
Months before I tried this script with an arduino uno board(5V) and from what I remember It worked perfectly,but a colleague told me its not possible my sccript is not working for an electrical scheme issue.

I leave the code here:

#include <SDI12.h>

#define DATA_PIN 7
#define SENSOR_ADDRESS 1
String sdiResponse = "";
SDI12 sdi(DATA_PIN);

void setup() {
  Serial.begin(1200);
  while(!Serial);

  sdi.begin();
  delay(500);
  // String command = String(SENSOR_ADDRESS) + "M";
   String command = "";
    command += 1;
    command += "M";
    command += "!"; 
  
  sdi.sendCommand(command);
  
  delay(1000);

  while (sdi.available()) {
    char c = sdi.read();
    if ((c != '\n') && (c != '\r')) {
      sdiResponse += c;
      delay(10);  // 1 character ~ 7.5ms
      
    }
    
  }
  Serial.println(sdiResponse);
  Serial.println("");

   delay(500);
   
   delay((((sdiResponse[1]-48)*100000)+((sdiResponse[2]-48)*10000)+((sdiResponse[3]-48)*1000))-500); //el [0] es el primer número.
   
    
// String command = String(SENSOR_ADDRESS) + "D0";
   String command1 = "";
    command1 += 1;
    command1 += "D0!";
  
  sdi.sendCommand(command1);
  
  delay(30);

  while (sdi.available()) {  // build string from response
    char c = sdi.read();
    if ((c != '\n') && (c != '\r')) {
      sdiResponse += c;
      delay(10);  // 1 character ~ 7.5ms
    }
  }
    Serial.println(sdiResponse);// write the response to the screen
    String Potencia = sdiResponse.substring(7, 14);
      int Potenciaint = Potencia.toInt();
      String T_suelo = sdiResponse.substring(15, 19);
      int T_sueloint = T_suelo.toInt();
      delay(1000);
      Serial.println("Potencia=" );
      Serial.println(Potenciaint);
      Serial.println("T_suelo=" );
      Serial.println(T_sueloint);
      
       
  sdi.clearBuffer();
  
}

void loop() {
  

}

I would appreciate any help,thank you.

2

What kind of string character do want this to put into 'command'?
Really odd coding. Why are You not using loop?

3

Im not using loop because this script is made to try that the comunication using SDI 12 works,when it fully works,I will add it into a data logger script in loop function.

In ''command'' string I want to write the 1M! and 1D0! to send information to the sensor,those commands are part of SDI12 library.

4

Then You choose the wrong way.

Look at this:
command += 1;
command += '1';
command += "1";

Arduino/reference might give inspiration!

You put a control character having the value 1 there. Check the ASCII table what that is!

5

Not true. The String class is smart enough to turn that into the string representation of the int 1 so the whole thing comes out as "1M!".

Just a long, odd whay of doing it vs.

command = "1M!";

6

Surprice, surprice. Never used C## after a half day introduktion 1994....

7

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.