With the lines enabled and the SD card is initalized, this is what reads out: 2 9:56:12Īnyhelp I can get would be greatly appreciated! Thanks. Please see the attached code, with lines 49-57 commented out this is the serial output: 2 9:55:2 So I tried every speed option the SdFat.h library allows (SPI_DIV3_SPEED, SPI_HALF_SPEED, SPI_FULL_SPEED, etc) and nothing changed the serial output. I think this may be due to the fact that the either the thermocouple boards are not synced on the clocking signal that the SD card is on. Now I should note that I have this thing built and am making no changes to hardware or pins. I have been digging into this for a few days and have determined that if i even initialize the SD card, all my thermocouple's stop reading temperatures. I can do everything I need to just find individually, but when I try to log the temperature readings onto the SD card. I can also read and write to the SD card perfectly fine (using the SdFat library optimized for the Mega 2560). Individually I can read the TC's just fine (using the MAX31855 library from rocketscream). New temperature readings are displayed on the Serial Monitor every second.I am using an Arduino Mega 2560 with (4) MAX31855 Thermocouple breakoutboards from Adafruit, and an SD shield from ( ) Oh I am also using a DS1307 real time clock but that works over I2C and I am not having any issues with that at all. Don’t forget the select the board you’re using in Tools > Board and select the COM port your board is connected to in Tools > Port.Īfter uploading the code, open the Serial Monitor at a baud rate of 9600. Serial.print("C = ") Īs you can see, it’s very simple to get temperature readings using the K-type thermocouple with the MAX6675 amplifier. The following lines read the temperature and display it on the Serial Monitor. thermocouple.readFahrenheit(): returns temperature in Fahrenheit degrees.thermocouple.readCelsius(): returns temperature in Celsius degrees.The library provides a method to read the temperature in Celsius and a method to read the temperature in Fahrenheit degrees. In the loop(), we read the temperature and display it on the Serial Monitor. In the setup(), initialize the Serial Monitor at a baud rate of 9600. MAX6675 thermocouple(thermoCLK, thermoCS, thermoDO) int thermoDO = 12 Ĭreate a MAX6675 object called thermocouple on the pins we’ve defined previously. #include "ma圆675.h"ĭefine the pins that are interfacing with the MAX6675 thermocouple amplifier. For the MAX6675 to update, you must delay AT LEAST 250ms between reads!įirst, include the ma圆675.h library. Serial.println(thermocouple.readFahrenheit()) Serial.println(thermocouple.readCelsius()) basic readout test, just print the current temp This code is the example provided by the library. The library provides an example that gets temperature and displays the results on the Arduino IDE Serial monitor. Getting temperature from the K-Type thermocouple with the Arduino is very simple. Code – Get Temperature from K-Type Thermocouple with MAX6675 Amplifier Search for “ ma圆675 ” in the search box and install the library from Adafruit. Open your Arduino IDE and go to Sketch > Include Library > Manage Libraries. We’ll use the ma圆675 library from Adafruit.įollow the next steps to install the library in your Arduino IDE: There are different libraries to get temperature from a K-type thermocouple using the MAX6675 amplifier.
0 Comments
Leave a Reply. |