I purchased few of these boards from China and haven’t been able to make it work with any available Arduino libraries, https://www.ebay.com/itm/222202249304
I get the following serial readings:
MAX31855 test
Internal Temp = 23.37
Something wrong with thermocouple!
2
nan
Internal Temp = 23.37
Something wrong with thermocouple!
2
nan
Internal Temp = 23.37
Something wrong with thermocouple!
2
nan
Internal Temp = 23.37
Something wrong with thermocouple!
2
nan
Internal Temp = 23.44
Something wrong with thermocouple!
2
nan
I added code Serial.println(thermocouple.readError()) and I get 2 And nan for the temperature readings and the wrong temperature for the internal temperature.
I was wondering if anyone had any luck making this boards work with Arduino?
Did you read the sticky post at the top of the topic list?
Post your complete code (use code tags!) and links to the used libraries (the IDE provides at least two libraries for these chips, you might have used another one). And post a wiring diagram of your setup (may be hand drawn).
#include <SPI.h>
#include "Adafruit_MAX31855.h"
// Default connection is using software SPI, but comment and uncomment one of
// the two examples below to switch between software SPI and hardware SPI:
// Example creating a thermocouple instance with software SPI on any three
// digital IO pins.
#define MAXDO 12
#define MAXCS 9
#define MAXCLK 13
// initialize the Thermocouple
Adafruit_MAX31855 thermocouple(MAXCLK, MAXCS, MAXDO);
// Example creating a thermocouple instance with hardware SPI
// on a given CS pin.
//#define MAXCS 10
//Adafruit_MAX31855 thermocouple(MAXCS);
void setup() {
while (!Serial); // wait for Serial on Leonardo/Zero, etc
Serial.begin(9600);
Serial.println("MAX31855 test");
// wait for MAX chip to stabilize
delay(500);
}
void loop() {
// basic readout test, just print the current temp
Serial.print("Internal Temp = ");
Serial.println(thermocouple.readInternal());
double c = thermocouple.readCelsius();
if (isnan(c)) {
Serial.println("Something wrong with thermocouple!");
Serial.println(thermocouple.readError());
Serial.println(c);
} else {
Serial.print("C = ");
Serial.println(c);
}
//Serial.print("F = ");
//Serial.println(thermocouple.readFarenheit());
delay(1000);
}
red is normally negative but the other wire is green in that case red should be positive, and i took the connector that came with it and red is positive and green is negative... will i have problems if i reverse the polarity?
looks like this was made for both chip 6675 and 31855 and thy have different pins description, T- in the 6675 should be connected to ground and in the 31855 should not be connected to ground... and I think thats why i'm getting the error!!
but if anyone made any modification please let me know until i get the real deal!! thank you
