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thermistor: Add support for defining custom thermistors

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Add the ability to define a new thermistor type in the config file.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-04-09 12:14:20 -04:00
parent f8a28401c0
commit 8c8261ba80
3 changed files with 54 additions and 2 deletions
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26
klippy/extras/thermistor.py
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@ -77,6 +77,27 @@ class Thermistor:
r = math.exp(ln_r)
return r / (self.pullup + r)
# Custom defined thermistors from the config file
class CustomThermistor:
def __init__(self, config):
self.name = " ".join(config.get_name().split()[1:])
t1 = config.getfloat("temperature1", minval=KELVIN_TO_CELCIUS)
r1 = config.getfloat("resistance1", minval=0.)
beta = config.getfloat("beta", None, above=0.)
if beta is not None:
self.params = {'t1': t1, 'r1': r1, 'beta': beta}
return
t2 = config.getfloat("temperature2", minval=KELVIN_TO_CELCIUS)
r2 = config.getfloat("resistance2", minval=0.)
t3 = config.getfloat("temperature3", minval=KELVIN_TO_CELCIUS)
r3 = config.getfloat("resistance3", minval=0.)
(t1, r1), (t2, r2), (t3, r3) = sorted([(t1, r1), (t2, r2), (t3, r3)])
self.params = {'t1': t1, 'r1': r1, 't2': t2, 'r2': r2,
't3': t3, 'r3': r3}
def create(self, config):
return Thermistor(config, self.params)
# Default sensors
Sensors = {
"EPCOS 100K B57560G104F": {
't1': 25., 'r1': 100000., 't2': 150., 'r2': 1641.9,
@ -93,3 +114,8 @@ def load_config(config):
for sensor_type, params in Sensors.items():
func = (lambda config, params=params: Thermistor(config, params))
pheater.add_sensor(sensor_type, func)
def load_config_prefix(config):
thermistor = CustomThermistor(config)
pheater = config.get_printer().lookup_object("heater")
pheater.add_sensor(thermistor.name, thermistor.create)