def start_sampling(self, frequency):
cmd = CmdSampler() # test what this does on a terminal
with I2C.open(Host.I2C_SENSORS) as f:
system_id = SystemID.load(Host)
tag = None if system_id is None else system_id.message_tag()
interface_conf = InterfaceConf.load(Host)
interface = interface_conf.interface()
gas_sensors = interface.gas_sensors(Host)
ndir_monitor = None # we don't use alphasenses for that.
sht_conf = SHTConf.load(Host)
sht = None if sht_conf is None else sht_conf.int_sht()
runner = TimedRunner(cmd.interval, cmd.samples) if cmd.semaphore is None \
else ScheduleRunner(cmd.semaphore, False)
sampler = GasesSampler(runner, tag, ndir_monitor, sht, gas_sensors)
sampler.start()
for sample in sampler.samples():
return JSONify.dumps(sample)
sampler.stop()
if cmd.verbose:
print("ndir_sampler: %s" % cmd, file=sys.stderr)
try:
# ------------------------------------------------------------------------------------------------------------
# resources...
# SystemID...
system_id = SystemID.load(Host)
tag = None if system_id is None else system_id.message_tag()
I2C.Sensors.open()
# Interface...
interface_conf = InterfaceConf.load(Host)
if interface_conf is None:
print("ndir_sampler: InterfaceConf not available.",
file=sys.stderr)
exit(1)
interface = interface_conf.interface()
if interface is None:
print("ndir_sampler: Interface not available.", file=sys.stderr)
exit(1)
# NDIRConf...
ndir_conf = NDIRConf.load(Host)