New MCP690X Thermocouple Component.

[jgu1]

Hi Martin!

Working perfect.

Jorgen.

[medelec35]

That's excellent Jorgen.
Thanks for letting us know.

[stefan.erni]

Hi Martin Hi Jorgen

I use the sparkfun MCP9600 screw terminal board and an ESP32.
If I use I2C Softwaremode I can read the temp from the sensor correct.

but the K element gives me also some value but in the wrong direction
when I increase the temperature, the MCP9600 measures less.
In ic2 channel1 mode, it's not working. Always get 1931 as value.

I am still doing something wrong?

[jgu1]

Hi Stefan Erni!

Sorry I have not mine connected up at the moment. I will try if I get time during the weekend. Could you please att. your project then I could give it a try.

Br jorgen

[stefan.erni]

Hi Jorgen

I was able to solve one problem.
Until now, I always thought of the colour red as positive voltage and the colour yellow as ground, but not with the K-elements
The incorrect values are due to the different colours of the sensors wire. Red is not always the positive pin and yellow the negative.
So I have turned the sensor wires and the temperature is now measured in the correct direction.

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An info about Thermocouple;

Thermocouple_Selection_Guide.pdf

(1021.17 KiB) Downloaded 672 times

a short description of my project:
My Board with a ESP32 and sd-card 4wire:

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a few sensors
I have not yet decided whether I will use it for screwing or plugging
screw:

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plug:

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i have not decided yet if i will change the board with the addresses or use a multiplexer

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I can give you parts of my software if you are interested

regards

Stefan

[jgu1]

Hi Stefan!

40cm error nice it´s sometime so easy. Yes if not to much work, I will be happy to see what you have done in your program.

Jorgen

[medelec35]

Hi Stefan.
I have just tested my MCP9600 on CH1 on Wroom-32 and is working as expected.
What pins are you using for data and clock?

[stefan.erni]

Hi Martin

on the Wroom_32
SDA A21
SCL A22

I used channel 1

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[medelec35]

Thanks Stefan.
I have tried with CH1 on the Wroom-32 and with the same pins as you and it's working for me.

[stefan.erni]

Hi Martin

in the future i will create a simpler programme only with sensor i hope it will work for me too.

I think I'm on the right track to build a very good temperature logger with flowcode.
I have to build a logger which during 2 minutes
the temperature at 8 positions and record it.
During this time I measure with 10hz and expect a temperature of 20 degrees up to 50 degrees. I want to measure with a resolution of 0.1 degree

it's working at the moment. But there is still a small problem.
I do a simple test and touch the sensor

When I read out the 16 bit integer I get a resolution of 1 degree celsius. This is not useful.

If I read float I get much more accurate values. I use 10Hz samplerate
but even with float there are large jumps and the values remain the same during some measurements.
This MPC9600 has many settings. How can I adjust these or know what they are set to?

Samplerate and resolution:

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read 16bit:

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read Float:

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