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Saur0o0n / PIDKiln

Kiln PID controller based on Espressif Systems ESP32 chip board with Arduino IDE.
GNU General Public License v2.0
102 stars 38 forks source link

MAX6675 instead of MAX31855 #44

Open ggioorgii opened 7 months ago

ggioorgii commented 7 months ago

first of all thank you for this great project. In my local area I only find MAX6675 boards. It is possible to easily replace code and use MAX6675 somehow? Or order MAX31855 and wait 1 month ? :(

Saur0o0n commented 7 months ago

I remember I had a brief discussion with somebody on 6675 (https://github.com/Saur0o0n/PIDKiln/issues/32#issue-1515106087) - but don't remember if I've checked then if this is feasible to use it. Also quick look shows it's 0°C to +1024°C - so you also have to take it into consideration.

ggioorgii commented 7 months ago

I find Max31855 and setup everything. It almost works. max6675 give me 1000c reads always.

But I have new problem. I can on/off relay by start or stop program, but when I set temp by program, it not try to hold that temp. relay is always on and kiln temp is increasing nonstop.

ggioorgii commented 7 months ago

image

ggioorgii commented 7 months ago

pin 19 was problematic. I don't know why. I using one relay, so uncomment second relay, set first relay to pin22 now everything works.

ggioorgii commented 7 months ago

I am so happy with this. Thank you again. little bit hard to setup for me, because I using different hardware, but it worth it.