def get_gps_time_sensor(self):
"""
Calculates GPS time using a TPV response from GPSd, and returns as a sensor dict
This time is not high accuracy.
"""
self.log.trace("Polling GPS time results from GPSD")
with GPSDIface() as gps_iface:
response_mode = 0
# Read responses from GPSD until we get a non-trivial mode
while response_mode <= 0:
gps_info = gps_iface.get_gps_info(resp_class='tpv', timeout=15)
self.log.trace("GPS info: {}".format(gps_info))
response_mode = gps_info.get("mode", 0)
time_str = gps_info.get("time", "")
self.log.trace("GPS time string: {}".format(time_str))
time_dt = datetime.datetime.strptime(time_str, "%Y-%m-%dT%H:%M:%S.%fZ")
self.log.trace("GPS datetime: {}".format(time_dt))
epoch_dt = datetime.datetime(1970, 1, 1)
gps_time = int((time_dt - epoch_dt).total_seconds())
return {
'name': 'gps_time',
'type': 'INTEGER',
'unit': 'seconds',
'value': str(gps_time),
}
def get_gps_sky_sensor(self):
"""
Get a SKY response from GPSd as a sensor dict
"""
self.log.trace("Polling GPS SKY results from GPSD")
with GPSDIface() as gps_iface:
# Just get the first SKY result
gps_info = gps_iface.get_gps_info(resp_class='sky', timeout=15)
# Return the JSON'd results
gps_sky = json.dumps(gps_info)
return {
'name': 'gps_sky',
'type': 'STRING',
'unit': '',
'value': gps_sky,
}
def get_gps_tpv_sensor(self):
"""
Get a TPV response from GPSd as a sensor dict
"""
self.log.trace("Polling GPS TPV results from GPSD")
with GPSDIface() as gps_iface:
response_mode = 0
# Read responses from GPSD until we get a non-trivial mode
while response_mode <= 0:
gps_info = gps_iface.get_gps_info(resp_class='tpv', timeout=15)
self.log.trace("GPS info: {}".format(gps_info))
response_mode = gps_info.get("mode", 0)
# Return the JSON'd results
gps_tpv = json.dumps(gps_info)
return {
'name': 'gps_tpv',
'type': 'STRING',
'unit': '',
'value': gps_tpv,
}