EnviroDIY

2022-10-05 at 12:15 PM #17371

Participant

I used the Mayfly 1.1 board and the sketch below. Thank you for helping me!

/*
########################
# OVERVIEW #
########################
Example B: Changing the address of a sensor.
This is a simple demonstration of the SDI-12 library for arduino.
It discovers the address of the attached sensor and allows you to change it.
#########################
# THE CIRCUIT #
#########################
The circuit: You should not have more than one SDI-12 device attached for this example.
See:
https://raw.github.com/Kevin-M-Smith/SDI-12-Circuit-Diagrams/master/basic_setup_no_usb.png
or
https://raw.github.com/Kevin-M-Smith/SDI-12-Circuit-Diagrams/master/compat_setup_usb.png
###########################
# COMPATIBILITY #
###########################
This library requires the use of pin change interrupts (PCINT).
Not all Arduino boards have the same pin capabilities.
The known compatibile pins for common variants are shown below.
Arduino Uno: All pins.
Arduino Mega or Mega 2560:
10, 11, 12, 13, 14, 15, 50, 51, 52, 53, A8 (62),
A9 (63), A10 (64), A11 (65), A12 (66), A13 (67), A14 (68), A15 (69).
Arduino Leonardo:
8, 9, 10, 11, 14 (MISO), 15 (SCK), 16 (MOSI)
#########################
# RESOURCES #
#########################
Written by Kevin M. Smith in 2013.
Contact: SDI12@ethosengineering.org
The SDI-12 specification is available at: http://www.sdi-12.org/
The library is available at: https://github.com/EnviroDIY/Arduino-SDI-12
*/

#include <SDI12.h>

#define SERIAL_BAUD 115200 // The baud rate for the output serial port
#define DATA_PIN 7 // The pin of the SDI-12 data bus
#define POWER_PIN 22 // The sensor power pin (or -1 if not switching power)

// Define the SDI-12 bus
SDI12 mySDI12(DATA_PIN);

String myCommand = ""; // empty to start
char oldAddress = '!'; // invalid address as placeholder




// this checks for activity at a particular address
// expects a char, '0'-'9', 'a'-'z', or 'A'-'Z'
boolean checkActive(byte i){ // this checks for activity at a particular address
Serial.print("Checking address ");
Serial.print((char)i);
Serial.print("...");
myCommand = "";
myCommand += (char) i; // sends basic 'acknowledge' command [address][!]
myCommand += "!";

for(int j = 0; j < 3; j++){ // goes through three rapid contact attempts
mySDI12.sendCommand(myCommand);
delay(30);
if(mySDI12.available()) { // If we here anything, assume we have an active sensor
Serial.println("Occupied");
mySDI12.clearBuffer();
return true;
}
else {
Serial.println("Vacant"); // otherwise it is vacant.
mySDI12.clearBuffer();
}
}
return false;
}

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

Serial.println("Opening SDI-12 bus...");
mySDI12.begin();
delay(500); // allow things to settle

// Power the sensors;
if(POWER_PIN > 0){
Serial.println("Powering up sensors...");
pinMode(POWER_PIN, OUTPUT);
digitalWrite(POWER_PIN, HIGH);
delay(200);
}
}

void loop(){
boolean found = false; // have we identified the sensor yet?

for(byte i = '0'; i <= '9'; i++){ // scan address space 0-9
if(found) break;
if(checkActive(i)){
found = true;
oldAddress = i;
}
}

for(byte i = 'a'; i <= 'z'; i++){ // scan address space a-z
if(found) break;
if(checkActive(i)){
found = true;
oldAddress = i;
}
}

for(byte i = 'A'; i <= 'Z'; i++){ // scan address space A-Z
if(found) break;
if(checkActive(i)){
found = true;
oldAddress = i;
}
}

if(!found){
Serial.println("No sensor detected. Check physical connections."); // couldn't find a sensor. check connections..
}
else{
Serial.print("Sensor active at address "); // found a sensor!
Serial.print(oldAddress);
Serial.println(".");

Serial.println("Enter new address."); // prompt for a new address
while(!Serial.available());
char newAdd= Serial.read();

// wait for valid response
while( ((newAdd<'0') || (newAdd>'9')) && ((newAdd<'a') || (newAdd>'z')) && ((newAdd<'A') || (newAdd>'Z'))){
if(!(newAdd =='\n') || (newAdd =='\r') || (newAdd ==' ')) {
Serial.println("Not a valid address. Please enter '0'-'9', 'a'-'A', or 'z'-'Z'.");
}
while(!Serial.available());
newAdd = Serial.read();
}

/* the syntax of the change address command is:
[currentAddress]A[newAddress]! */

Serial.println("Readdressing sensor.");
myCommand = "";
myCommand += (char) oldAddress;
myCommand += "A";
myCommand += (char) newAdd;
myCommand += "!";
mySDI12.sendCommand(myCommand);

/* wait for the response then throw it away by
clearing the buffer with clearBuffer() */
delay(300);
mySDI12.clearBuffer();

Serial.println("Success. Rescanning for verification.");

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########################

# OVERVIEW #

########################

Example B: Changing the address of a sensor.

This is a simple demonstration of the SDI-12 library for arduino.

It discovers the address of the attached sensor and allows you to change it.

#########################

# THE CIRCUIT #

#########################

The circuit: You should not have more than one SDI-12 device attached for this example.

See:

https://raw.github.com/Kevin-M-Smith/SDI-12-Circuit-Diagrams/master/basic_setup_no_usb.png

https://raw.github.com/Kevin-M-Smith/SDI-12-Circuit-Diagrams/master/compat_setup_usb.png

###########################

# COMPATIBILITY #

###########################

This library requires the use of pin change interrupts (PCINT).

Not all Arduino boards have the same pin capabilities.

The known compatibile pins for common variants are shown below.

Arduino Uno: All pins.

Arduino Mega or Mega 2560:

10, 11, 12, 13, 14, 15, 50, 51, 52, 53, A8 (62),

A9 (63), A10 (64), A11 (65), A12 (66), A13 (67), A14 (68), A15 (69).

Arduino Leonardo:

8, 9, 10, 11, 14 (MISO), 15 (SCK), 16 (MOSI)

#########################

# RESOURCES #

#########################

Written by Kevin M. Smith in 2013.

Contact: SDI12@ethosengineering.org

The SDI-12 specification is available at: http://www.sdi-12.org/

The library is available at: https://github.com/EnviroDIY/Arduino-SDI-12

#include <SDI12.h>

#define SERIAL_BAUD 115200 // The baud rate for the output serial port

#define DATA_PIN 7 // The pin of the SDI-12 data bus

#define POWER_PIN 22 // The sensor power pin (or -1 if not switching power)

// Define the SDI-12 bus

SDI12 mySDI12(DATA_PIN);

String myCommand = ""; // empty to start

char oldAddress = '!'; // invalid address as placeholder

// this checks for activity at a particular address

// expects a char, '0'-'9', 'a'-'z', or 'A'-'Z'

boolean checkActive(byte i){ // this checks for activity at a particular address

Serial.print("Checking address ");

Serial.print((char)i);

Serial.print("...");

myCommand = "";

myCommand += (char) i; // sends basic 'acknowledge' command [address][!]

myCommand += "!";

for(int j = 0; j < 3; j++){ // goes through three rapid contact attempts

mySDI12.sendCommand(myCommand);

delay(30);

if(mySDI12.available()) { // If we here anything, assume we have an active sensor

Serial.println("Occupied");

mySDI12.clearBuffer();

return true;

}

else {

Serial.println("Vacant"); // otherwise it is vacant.

mySDI12.clearBuffer();

}

return false;

}

void setup(){

Serial.begin(SERIAL_BAUD);

while(!Serial);

Serial.println("Opening SDI-12 bus...");

mySDI12.begin();

delay(500); // allow things to settle

// Power the sensors;

if(POWER_PIN > 0){

Serial.println("Powering up sensors...");

pinMode(POWER_PIN, OUTPUT);

digitalWrite(POWER_PIN, HIGH);

delay(200);

}

void loop(){

boolean found = false; // have we identified the sensor yet?

for(byte i = '0'; i <= '9'; i++){ // scan address space 0-9

if(found) break;

if(checkActive(i)){

found = true;

oldAddress = i;

}

for(byte i = 'a'; i <= 'z'; i++){ // scan address space a-z

if(found) break;

if(checkActive(i)){

found = true;

oldAddress = i;

}

for(byte i = 'A'; i <= 'Z'; i++){ // scan address space A-Z

if(found) break;

if(checkActive(i)){

found = true;

oldAddress = i;

}

if(!found){

Serial.println("No sensor detected. Check physical connections."); // couldn't find a sensor. check connections..

}

else{

Serial.print("Sensor active at address "); // found a sensor!

Serial.print(oldAddress);

Serial.println(".");

Serial.println("Enter new address."); // prompt for a new address

while(!Serial.available());

char newAdd= Serial.read();

// wait for valid response

while( ((newAdd<'0') || (newAdd>'9')) && ((newAdd<'a') || (newAdd>'z')) && ((newAdd<'A') || (newAdd>'Z'))){

if(!(newAdd =='\n') || (newAdd =='\r') || (newAdd ==' ')) {

Serial.println("Not a valid address. Please enter '0'-'9', 'a'-'A', or 'z'-'Z'.");

}

while(!Serial.available());

newAdd = Serial.read();

}

/* the syntax of the change address command is:

[currentAddress]A[newAddress]! */

Serial.println("Readdressing sensor.");

myCommand = "";

myCommand += (char) oldAddress;

myCommand += "A";

myCommand += (char) newAdd;

myCommand += "!";

mySDI12.sendCommand(myCommand);

/* wait for the response then throw it away by

clearing the buffer with clearBuffer() */

delay(300);

mySDI12.clearBuffer();

Serial.println("Success. Rescanning for verification.");