LoPy and MAX6675 SPI Thermocouple

[alessio_ultrafab]

Hello everyone,

i'm trying to read data from a MAX6675 SPI Thermocouple adapter.

Connecting the MAX6675 pins to the LoPY (SCK->PIN10,SO->P12,CS not connected) i always read a value of 0.

I've tried to change the various parameters (phase, baudrate, polarity) but i've not obtained any significant result.

Any one can give me some address?

Thanks!
Alessio

[robert-hh]

@alessio_ultrafab At least you have to pull CS low to activate the device.

[alessio_ultrafab]

Thank you @robert-hh

I set the Pin 8 low and connect the CS, then the read is correct now.

Thanks,
Alessio

[livius]

@alessio_ultrafab
May i ask which Thermocouple do you use - just curious..

[alessio_ultrafab]

Hello @livius,

it's the one provided with the standard MAX6675 kit found on eBay/Amazon.

It's declared as a Type K, but i'm not 100% sure. Anyway the measurement is quite accurate, at least for the range i use it (about 10°-40°).

[livius]

@alessio_ultrafab said in LoPy and MAX6675 SPI Thermocouple:

it's the one provided with the standard MAX6675 kit found on eBay/Amazon.

Thank you, i asked because sometimes i see some interested real word case
and someone use some sensor because it is better then other in some conditions and he/she can say why

[pyrosales]

It is hard to determine the quality of thermocouples purchased via Ebay/Amazon. It may be a great sensor, however if you need something of quality and accuracy – or even just general information, just go to [www.pyrosales.com.au](link url)

CEO John S