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bme280: handle read timeout exceptions 

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>
This commit is contained in:
Arksine 2020-02-14 14:22:37 -05:00 committed by KevinOConnor
parent 9a65a4569b
commit b23346a521
1 changed files with 12 additions and 5 deletions
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9
klippy/extras/bme280.py
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@ -111,13 +111,20 @@ class BME280:
meas = self.os_temp << 5 | self.os_pres << 2 | MODE
self.write_register('CTRL_MEAS', meas)
try:
# wait until results are ready
status = self.read_register('STATUS', 1)[0]
while status & STATUS_MEASURING:
self.reactor.pause(self.reactor.monotonic() + self.max_sample_time)
self.reactor.pause(
self.reactor.monotonic() + self.max_sample_time)
status = self.read_register('STATUS', 1)[0]
data = self.read_register('PRESSURE_MSB', 8)
except Exception:
logging.exception("BME280: Error reading data")
self.temp = self.pressure = self.humidity = .0
return self.reactor.NEVER
pressure_raw = (data[0] << 12) | (data[1] << 4) | (data[2] >> 4)
temp_raw = (data[3] << 12) | (data[4] << 4) | (data[5] >> 4)
humid_raw = (data[6] << 8) | data[7]