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81 lines
2.7 KiB
Python
81 lines
2.7 KiB
Python
# 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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HOST_REPORT_TIME = 1.0
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RPI_PROC_TEMP_FILE = "/sys/class/thermal/thermal_zone0/temp"
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class Temperature_HOST:
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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.path = config.get("sensor_path", RPI_PROC_TEMP_FILE)
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self.temp = self.min_temp = self.max_temp = 0.0
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self.printer.add_object("temperature_host " + self.name, self)
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if self.printer.get_start_args().get('debugoutput') is not None:
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return
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self.sample_timer = self.reactor.register_timer(
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self._sample_pi_temperature)
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try:
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self.file_handle = open(self.path, "r")
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except:
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raise config.error("Unable to open temperature file '%s'"
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% (self.path,))
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self.printer.register_event_handler("klippy:connect",
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self.handle_connect)
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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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self.min_temp = min_temp
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self.max_temp = max_temp
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def setup_callback(self, cb):
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self._callback = cb
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def get_report_time_delta(self):
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return HOST_REPORT_TIME
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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("temperature_host: 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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"HOST temperature %0.1f below minimum temperature of %0.1f."
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% (self.temp, self.min_temp,))
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if self.temp > self.max_temp:
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self.printer.invoke_shutdown(
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"HOST temperature %0.1f above maximum temperature of %0.1f."
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% (self.temp, self.max_temp,))
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mcu = self.printer.lookup_object('mcu')
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measured_time = self.reactor.monotonic()
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self._callback(mcu.estimated_print_time(measured_time), self.temp)
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return measured_time + HOST_REPORT_TIME
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def get_status(self, eventtime):
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return {
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'temperature': round(self.temp, 2),
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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("temperature_host", Temperature_HOST)
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