temperature_sensor: Add generic temperature sensor support

Signed-off-by: Douglas Hammond <wizhippo@gmail.com>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 27 insertions, 0 deletions

diff --git a/klippy/extras/temperature_sensor.py b/klippy/extras/temperature_sensor.py
new file mode 100644
index 00000000..c4f2c9e0
--- /dev/null
+++ b/klippy/extras/temperature_sensor.py
@@ -0,0 +1,27 @@
+# Support generic temperature sensors
+#
+# Copyright (C) 2019  Kevin O'Connor <kevin@koconnor.net>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+
+KELVIN_TO_CELCIUS = -273.15
+
+class PrinterSensorGeneric:
+    def __init__(self, config):
+        self.printer = config.get_printer()
+        self.sensor = self.printer.lookup_object('heater').setup_sensor(config)
+        self.min_temp = config.getfloat('min_temp', KELVIN_TO_CELCIUS,
+                                        minval=KELVIN_TO_CELCIUS)
+        self.max_temp = config.getfloat('max_temp', 99999999.9,
+                                        above=self.min_temp)
+        self.sensor.setup_minmax(self.min_temp, self.max_temp)
+        self.sensor.setup_callback(self.temperature_callback)
+        self.printer.lookup_object('heater').register_sensor(config, self)
+        self.last_temp = 0.
+    def temperature_callback(self, read_time, temp):
+        self.last_temp = temp
+    def get_temp(self, eventtime):
+        return self.last_temp, 0.
+
+def load_config_prefix(config):
+    return PrinterSensorGeneric(config)