Turn serial print for multiple one wire devices to particle.publish

Firmware
1

I am trying to publish data from 2 one wire temp sensors.I can print data to the serial port but am having trouble doing a particle.publish in the code. I am kind of a newb at this and would appreciate any help.Can someone show me code to publish temp 1 and temp 2.

thanks
Dennis Mitchell

// This #include statement was automatically added by the Particle IDE.
#include <OneWire.h>

//#include "OneWire/OneWire.h"  

OneWire ds = OneWire(D2);  // 1-wire signal on pin D4
byte addrs[3][8] = {{0x28, 0xDE, 0x4F, 0x7, 0xD6, 0x1, 0x3C, 0xD8}, {0x28, 0x9F, 0x7, 0x79, 0xA2, 0x1, 0x3, 0x7E}};
float temps[3];
float celsius, fahrenheit;

void setup() {
  Serial.begin(9600);
  delay(3000);
}


void loop() {
  
  ds.reset();            
  ds.skip();          // Make all devices start the temperature conversion
  ds.write(0x44, 0);     // tell it to start a conversion, with parasite power on at the end
  //ds.write(0x44, 0);        // or start conversion in powered mode (bus finishes low)

  delay(1000);     //  wait 1 sec for conversion

  ds.reset();
  
  for (int i=0; i<3; i++) {
      ds.select(addrs[i]);
      ds.write(0xBE,0);         // Read Scratchpad
    
       byte data0 = ds.read();
       byte data1 = ds.read();
       ds.reset();
      
      int16_t raw = (data1 << 8) | data0;
    
      celsius = (float)raw * 0.0625;
      fahrenheit = celsius * 1.8 + 32.0;
      temps[i] = fahrenheit;
  }
  
  Serial.printlnf("Temp 1: %.1f   Temp 2: %.1f", temps[0], temps[1]);
  delay(10000);
}
2

Instead of directly printing, put the string into a variable and print that

  char txt[64];
  snprintf(txt, sizeof(txt), "Temp 1: %.1f   Temp 2: %.1f", temps[0], temps[1]);
  Serial.println(txt),
  Particle.publish("envData", txt);
1 Like
3

Thanks so much.

That works perfectly

1 Like
4

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