mirror of https://github.com/Desuuuu/klipper.git
89 lines
2.7 KiB
Python
89 lines
2.7 KiB
Python
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# Support for Raspberry Pi temperature sensor
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#
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# Copyright (C) 2020 Al Crate <al3ph@users.noreply.github.com>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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import logging
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RPI_REPORT_TIME = 1.0
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KELVIN_TO_CELSIUS = -273.15
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PROC_TEMP_FILE = "/sys/class/thermal/thermal_zone0/temp"
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class RPiTemperature:
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def __init__(self, config):
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self.printer = config.get_printer()
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self.reactor = self.printer.get_reactor()
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self.name = config.get_name().split()[-1]
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self.temp = 0.0
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self.file_handle = None
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self.min_temp = config.getfloat('min_temp', -40,
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minval=KELVIN_TO_CELSIUS)
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self.max_temp = config.getfloat('max_temp', 85,
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above=self.min_temp)
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self.printer.add_object("rpi_temperature " + self.name, self)
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self.sample_timer = self.reactor.register_timer(
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self._sample_pi_temperature
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)
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try:
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self.file_handle = open(PROC_TEMP_FILE, "r")
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except:
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raise config.error(
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"Unable to open temperature file '%s'" % (PROC_TEMP_FILE)
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)
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self.printer.register_event_handler(
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"klippy:connect", self.handle_connect
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)
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def handle_connect(self):
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self.reactor.update_timer(self.sample_timer, self.reactor.NOW)
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def setup_minmax(self, min_temp, max_temp):
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pass
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def setup_callback(self, cb):
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self._callback = cb
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def _sample_pi_temperature(self, eventtime):
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try:
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self.file_handle.seek(0)
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self.temp = float(self.file_handle.read())/1000.0
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except Exception:
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logging.exception("rpi_temperature: Error reading data")
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self.temp = 0.0
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return self.reactor.NEVER
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if self.temp < self.min_temp:
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self.printer.invoke_shutdown(
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"RPi temperature %0.1f below minimum"
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" temperature of %0.1f." % (self.temp, self.min_temp,)
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)
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if self.temp > self.max_temp:
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self.printer.invoke_shutdown(
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"RPi temperature %0.1f above maximum"
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" temperature of %0.1f." % (self.temp, self.max_temp,)
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)
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measured_time = self.reactor.monotonic()
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self._callback(measured_time, self.temp)
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return measured_time + RPI_REPORT_TIME
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def get_status(self, eventtime):
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return {
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'temperature': self.temp,
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}
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def load_config(config):
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# Register sensor
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pheaters = config.get_printer().load_object(config, "heaters")
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pheaters.add_sensor_factory(
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"rpi_temperature", RPiTemperature
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)
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