diff options
Diffstat (limited to 'klippy/extras/ds18b20.py')
| -rw-r--r-- | klippy/extras/ds18b20.py | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/klippy/extras/ds18b20.py b/klippy/extras/ds18b20.py index 749ae520..76e38532 100644 --- a/klippy/extras/ds18b20.py +++ b/klippy/extras/ds18b20.py @@ -10,6 +10,7 @@ DS18_REPORT_TIME = 3.0 # Temperature can be sampled at any time but conversion time is ~750ms, so # setting the time too low will not make the reports come faster. DS18_MIN_REPORT_TIME = 1.0 +DS18_MAX_CONSECUTIVE_ERRORS = 4 class DS18B20: def __init__(self, config): @@ -32,7 +33,7 @@ class DS18B20: def _build_config(self): sid = "".join(["%02x" % (x,) for x in self.sensor_id]) self._mcu.add_config_cmd("config_ds18b20 oid=%d serial=%s" - % (self.oid, sid)) + % (self.oid, sid, DS18_MAX_CONSECUTIVE_ERRORS)) clock = self._mcu.get_query_slot(self.oid) self._report_clock = self._mcu.seconds_to_clock(self.report_time) @@ -44,7 +45,9 @@ class DS18B20: def _handle_ds18b20_response(self, params): temp = params['value'] / 1000.0 - if temp < self.min_temp or temp > self.max_temp: + if params["fault"] != 0: + temp = 0 # read error! report 0C and don't check temp range + elif temp < self.min_temp or temp > self.max_temp: self.printer.invoke_shutdown( "DS18B20 temperature %0.1f outside range of %0.1f:%.01f" % (temp, self.min_temp, self.max_temp)) |