How to read enclosure temperature & display in Octoprint?

LePaul · October 21, 2024, 1:22am

Hi,

I am curious about a plug in that will read the temperature inside an enclosure.
For that, I also need to know what sort of device to plug into the Raspberry Pi that would be supported.
I have the Raspberry Pi mounted outside of each 3D printer enclosure (12) and I tried putting a temp/humidity gauge inside each enclosure but it wasn't readable from the camera angle. Which is fine, I would rather have Octoprint and Obico closely monitoring for fails.

If there's something already out there, I haven't found both the hardware and plugin that would work!

Thanks!

jneilliii · October 21, 2024, 2:52am

Enclosure plugin is probably what you're looking for if you want to direct connect to the pi. It says abandoned, but should still function for most use cases. Other options include a single file python plugin that reports "chamber" temperature to OctoPrint, and with chamber enabled in settings it will default to show in temp graph. TopTemp plugin is another option as well as my PlotyTempGraph plugin and a single file plugin to report temperature as something other that "C".

jneilliii · October 21, 2024, 2:57am

I also have graphing integrated in my Tasmota plugin if you have a a Tasmota device connected to a sensor. Should support any type of device that the Tasmota project supports connected to an esp8266 or esp32 device.

Relative to single file plugin, here's an example, without PlotlyTempGraph plugin you would have to edit the reported data replacing self.last_temps["DS18B20"] with self.last_temps["C"].

github.com

jneilliii/OctoPrint-PlotlyTempGraph/blob/75de5e85dab4817399d20d998e37dacceedb6130/examples/DS18B20 Plotly Temp Graph Integration.py

# coding=utf-8
from __future__ import absolute_import

import octoprint.plugin
import os
import glob
import time
from octoprint.util import RepeatedTimer


class DS18B20Graph(octoprint.plugin.StartupPlugin):
	def __init__(self):
		self.last_temps = dict()
		self.poll_temps = None

	def on_after_startup(self):
		# initialize stuff
		os.system('modprobe w1-gpio')
		os.system('modprobe w1-therm')

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LePaul · October 21, 2024, 3:04am

Thank you for the replies

As I mentioned, I have the Pi's mounted outside of the enclosures. What temp sensor would you suggest? Something that comes off the GPIO pins or something connected via USB port?

LePaul · October 21, 2024, 3:17am

I was thinking something like this (like to find something in USA, not Australia tho!)

Not sure it shows humidity, would we be a nice plus to have

LePaul · October 21, 2024, 3:23am

What about something like this?

jneilliii · October 21, 2024, 5:03pm

well, the example single file plugin I linked above is for DS18B20 based devices like this. No idea if it really works, I just grabbed the code from either the enclosure plugin or possibly TopTemp, can't remember exactly which now.