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). It does not store any personal data.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. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. MAX6675 thermocouple sensor type K thermocouple module, thermoelectric coupling electrode You can pick up the module and a thermocouple for about $15 Open the serial monitor window and you should see something like this set offset for temperature measurement. Ma圆675 module: SO on pin #8, SS on pin #9, CSK on pin #10 of Arduino UNO Here are the connections, sometimes these are named differently on the modules, in particular the CS connection Here is a picture of the module that I purchased Usually you use these in a breakout/module form and can also purchase a kit which includes a thermocouple. This converter resolves temperatures to 0.25☌, allows readings as high as +1024☌, and exhibits thermocouple accuracy of 8 LSBs for temperatures ranging from 0☌ to +700☌. The data is output in a 12-bit resolution, SPI™-compatible, read-only format. The MAX6675 performs cold-junction compensation and digitizes the signal from a type-K thermocouple. In this example we take a look at the MAX6675 Cold-Junction-Compensated K-Thermocouple-to-Digital Converter
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