PT1000 on Octopus Pro, ADC out of range | VORONDesign | Page 1

prisma tiger Jul 19, 2025, 4:35 AM

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Trying to get a chamber sensor setup finally so I wired up a 2 pin PT1000 into the middle 2 pins of the 4 pin connector to use on the Octopus Pro. Set the dip switches according to the manual, and then tried to configure the sensor in Klipper with:

[temperature_sensor chamber_temp]
sensor_type: PT1000
sensor_pin: PF8
pullup_resistor: 4300
min_temp: 0
max_temp: 100

I'm currently getting the following error:
MCU 'mcu' shutdown: ADC out of range

Sensor 'temperature_sensor chamber_temp' temperature 4205746.253 not in range 0.000:100.000

I'm guessing I'm just missing something simple but I can't seem to figure out what it is.

visual thicket Jul 19, 2025, 4:38 AM

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prisma tiger Trying to get a chamber sensor setup finally so I wired up a 2 pin PT1000 into t...

sensor_type:PT1000 is a pt1000 plugged directly into a thermistor port

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you, on the other hand, have it plugged into a MAX31865 port

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there should be an example of how to configure that in your sample config

prisma tiger Jul 19, 2025, 4:40 AM

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I have it plugged in here

visual thicket Jul 19, 2025, 4:42 AM

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I know

raven sky Jul 19, 2025, 4:42 AM

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Also, dip switches need to be set.

visual thicket Jul 19, 2025, 4:43 AM

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that isn't a conventional thermistor port, that's a MAX31865 port.

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which, don't get me wrong, is a good choice for that sensor. but right now you haven't told klipper that's the port you're using

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and...I was wrong. there's no config snippet for that in the blank octopus config.

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that's very inconvenient

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try

sensor_type: MAX31865
sensor_pin: PF2
spi_software_sclk_pin: PA5
spi_software_mosi_pin: PA7
spi_software_miso_pin: PA6
rtd_nominal_r: 1000
rtd_num_of_wires: 2
rtd_reference_r: 4300

#PT1000 on Octopus Pro, ADC out of range