Hello,
I am just using an example code I downloaded from the website: http://www.github.com and followed the instructions given on adafruit site to do the wiring of the arduino uno board but when I upload it in the Arduino Software it shows the constant temperature of -127.94 and says "something wrong with the thermocouple". Below are the copy of the example code I am using and will attach pictures of the arduino board and the amplifier MAX31855 and wirings I have done. I would appreciate your help.
Code:
/***************************************************
This is an example for the Adafruit Thermocouple Sensor w/MAX31855K
Designed specifically to work with the Adafruit Thermocouple Sensor
----> https://www.adafruit.com/products/269
These displays use SPI to communicate, 3 pins are required to
interface
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, all text above must be included in any redistribution
****************************************************/
#include "Adafruit_MAX31855.h"
int thermoDO = 3;
int thermoCS = 4;
int thermoCLK = 5;
Adafruit_MAX31855 thermocouple(thermoCLK, thermoCS, thermoDO);
void setup() {
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!");
} else {
Serial.print("C = ");
Serial.println(c);
}
//Serial.print("F = ");
//Serial.println(thermocouple.readFarenheit());
delay(1000);
}
Error: Something wrong with thermocouple
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Please be positive and constructive with your questions and comments.
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Error: Something wrong with thermocouple
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- Franklin97355
- Posts: 23912
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Re: Error: Something wrong with thermocouple
You really need to solder wires or headers to the breakout board. Your problem could well be the connections you have there. You also don't have a thermocouple connected to the board.
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Re: Error: Something wrong with thermocouple
Actually I had thermocouple connected when I ran the code, its just when I took the pics it was sitting on the side. I will solder them and see if the problem is fixed. Thanks for the reply.
- adafruit_support_mike
- Posts: 67454
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Re: Error: Something wrong with thermocouple
Loosely connected wires tend to produce noisy connections, and for high-speed signals like SPI, that kind of noise can mess up the signals to the point of being meaningless. You do need solder joints.
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Re: Error: Something wrong with thermocouple
Thanks. I have soldered the wires and its reading temperature now but it seems like its reading the temperature backwards. What should i do ??
- adafruit_support_mike
- Posts: 67454
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Error: Something wrong with thermocouple
Sounds like you have the wires from the thermocouple connected backwards. Try swapping them in the terminal sockets.
-
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- Joined: Tue Nov 12, 2013 5:23 pm
Re: Error: Something wrong with thermocouple
I just swap the wires and its reading correct temperature now. Thanks
Please be positive and constructive with your questions and comments.