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SDI12 - ESP32 NOT OPEN BUS #85

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matiasAS opened this issue Feb 4, 2022 · 9 comments
Open

SDI12 - ESP32 NOT OPEN BUS #85

matiasAS opened this issue Feb 4, 2022 · 9 comments

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@matiasAS
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matiasAS commented Feb 4, 2022 •
edited

Hello everyone @majenkotech @diegogmx @majenkotech,@ALL I am trying to read data from a Campbell Scientific sensor by sdi12 with an ESP32, but the sensor does not recognize me or it simply does not detect that the sdi12 object is available.
I share my code in case someone could help me

I'm from Chile, that's why there are some lines in Spanish. If there was someone who spoke my language much better!!!

`//#include <SPI.h>
//#include <UIPEthernet.h>
//#include <SPI.h>
//#include <Ethernet.h>
#include <WiFi.h>
#include <PubSubClient.h>
#include <ArduinoJson.h>

#include <WiFi.h>
#include <WebServer.h>
#include <ESPmDNS.h>
#include "SDI12.h"
SDI12 mySDI12(2);
String datos = "";
bool isAvailable(int pin){
// SDI12 mySDI12(pin);
// Serial.println("DATAPIN: "+this->DATAPIN);
return mySDI12.available();
}
void printBufferToScreen(int pin){
Serial.println(" en print buffer screen ");
String buffer = "";
buffer +="{"H":"";
byte cont = 0;
byte largo = 0;
byte cont_largo = 0;
mySDI12.read(); // consume address

while(mySDI12.available()){
Serial.println("dentro del while print buffer screeen");
char c = mySDI12.read();
if(c == '+'){
if(cont == 0){
}
if(cont == 1){
buffer += "","CE":"";
}
if(cont == 2){
buffer += "","T":"";
}if(cont == 3){
buffer += "","PDIEF":"";
}
if(cont == 4){
buffer +="}";
}
cont++;
if(c == '-') {
buffer += '-';
}
if(c=='\0'){
}
}
else {
buffer += c;
}

delay(100);   
}

Serial.println("despues del while en print buffer screen");
datos = buffer;
}

void takeMeasurement(char i,int pin){
Serial.println(" take measurement");
String command = "";
command += i;
command += "M3!"; // SDI-12 measurement command format [address]['M'][!]
mySDI12.sendCommand(command);
while(!mySDI12.available()>5); // wait for acknowlegement with format [address][ttt (3 char, seconds)][number of measurments available, 0-9]
delay(100);
mySDI12.read(); //consume address

// find out how long we have to wait (in seconds).
int wait = 0;
wait += 100 * mySDI12.read()-'0';
wait += 10 * mySDI12.read()-'0';
wait += 1 * mySDI12.read()-'0';

mySDI12.read(); // ignore # measurements, for this simple examlpe
mySDI12.read(); // ignore carriage return
mySDI12.read(); // ignore line feed

long timerStart = millis();
while((millis() - timerStart) > (1000 * wait)){
if(mySDI12.available()) break; //sensor can interrupt us to let us know it is done early
}

// in this example we will only take the 'DO' measurement
mySDI12.flush();
command = "";
command += i;
command += "D0!"; // SDI-12 command to get data [address][D][dataOption][!]
mySDI12.sendCommand(command);
while(!mySDI12.available()>1); // wait for acknowlegement
delay(300); // let the data transfer
//Serial.println("antes de printBufferToScreen()");

printBufferToScreen(pin);
mySDI12.flush();
}

String obtenerDatos(int pin){
float temp_c;
float humidity;
temp_c = 0;//sht1x.readTemperatureC();
humidity = 0;//sht1x.readHumidity();
takeMeasurement('0',int(pin));
// datos +="","PH":"","+""TA":"+"""+temp_c+"","+""HA":"+"}";

datos +="","PH":"",";
datos += ""TA":";
datos +=""";
datos += temp_c;
datos +="",";
datos += ""HA":";
datos +=""";
datos += humidity;
datos +=""";
datos += "}";
int largo_datos = datos.length()+1;
char datos_array[largo_datos];
//char nuevo_datos_array[largo_datos];
String datos_limpios = String("");
datos.toCharArray(datos_array,largo_datos);
for(int i=0;i<largo_datos;i++){
if(datos_array[i] != '\0' && datos_array[i] != '\n' && datos_array[i] != '\r'){
datos_limpios+=datos_array[i];
}
}
return String(datos_limpios);
}

String jsonSensor(int id){
Serial.print("id: ");
Serial.println(id);
String data = obtenerDatos(id);
String json = "{";
json += ""pin":";
json += """;
json += id;
json += "",";
json += ""available":";
json += """;
json += isAvailable(id);
json += "",";
json += ""data":";
//json += """;
json += data;
//json += """;
json += "}";
return String(json);
}

void setup() {
Serial.begin(115200);
delay(500);
mySDI12.begin();
}

void loop() {
Serial.println(jsonSensor(2));
delay(1000);
}
`

I hope you can help me

Thank you
Greetings
Matias
@matiasAS
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matiasAS commented Feb 4, 2022 •
edited

I can get data with arduino menga and old version sdi-12 library (incompatible with esp32), but i need use a esp32

@matiasAS
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Hello @ALL @majenkotech @diegogmx @aufdenkampe @Kevin-M-Smith , could you help me please, I've been waiting 20 days for an answer

@matiasAS
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@SRGDamia1

@diegogmx
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diegogmx commented Feb 25, 2022 via email

@matiasAS
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Hola @diegogmx gracias por tu respuesta, y que bueno poder hablar en español, jajaja, soy de chile. He estado preguntando en grupos de electrónica en facebook y me dicen que debo pasar la señal de sensor por un conversor para bajar de 5v a 3.3v que es a lo que trabaja el ESP32.

La razón de usar un ESP32 primero por su precio y segundo porque se puede conectar a wifi y es super estable y confiable en ese sentido. Ya tengo un plan B que sería un arduino mega con el shied YUN, con eso estaría super!!.

Sobre lo del osciloscopio....tengo uno que compré en aliexpress, es uno mini, pero la verdad que en los 7 años que estuve en la U, una de las cosas que más de una vez vi y que nunca aprendí a usar es....un osciloscopio.....

Saludos

@matiasAS
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ahora @diegogmx mi duda es si en el readme de este repo aseguran compatibilidad con ESP32, en caso de tener que usar algun tipo de conversor lo deberia decir o estoy equivocado?

@diegogmx
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diegogmx commented Feb 25, 2022 via email

@matiasAS
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@diegogmx sinceramente nosé de lo que me hablas....y no, no soy electrónico. Lo que tengo implementado es obtener datos con arduino, transmitir por mqtt a una raspberry y ahi con python/django hacer todo lo de transmitir los datos a un server central, almacenar datos y mostrar en gráficos la data

@diegogmx
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diegogmx commented Feb 26, 2022 via email

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@diegogmx @matiasAS