def log(request, batch_id):
batch = Batch.objects.get(id=batch_id)
logs = MashLog.objects.filter(batch=batch)
if logs.count() > 0:
is_started = True
first_log = logs[:1].get()
last_log = logs.latest('id')
seconds_running = last_log.created - first_log.created
seconds_running = seconds_running.seconds
else:
is_started = False
seconds_running = None
if get_variable('active_mashingprocess_batch_id', 'None') == str(batch.id):
mashing_process_is_running = True
else:
mashing_process_is_running = False
return render_to_response('mashing.html',{
'batch' : batch,
'is_started': is_started,
'is_running': mashing_process_is_running,
'seconds_running': seconds_running
}, context_instance=RequestContext(request))
def init_mashing(batch):
# (Re)set defaults for batch
set_batch_defaults(batch)
set_variable('active_mashingprocess_batch_id', str(batch.id))
# Initialize Arduino with Nanpy
if not settings.ARDUINO_SIMULATION:
sensor = DallasTemperature(ARDUINO_TEMPERATURE_PIN)
addr = sensor.getAddress(ARDUINO_TEMPERATURE_PIN)
Arduino.pinMode(ARDUINO_HEAT_PIN, Arduino.OUTPUT)
Arduino.pinMode(ARDUINO_COOL_PIN, Arduino.OUTPUT)
Arduino.pinMode(ARDUINO_STATUS_PIN, Arduino.OUTPUT)
Arduino.digitalWrite(ARDUINO_HEAT_PIN, Arduino.LOW)
Arduino.digitalWrite(ARDUINO_COOL_PIN, Arduino.LOW)
Arduino.digitalWrite(ARDUINO_STATUS_PIN, Arduino.HIGH)
else:
# Set initial dummy temperature
batch.temperature = 20 # Testing purpose only
batch.save()
batch = Batch.objects.get(id=batch.id)
# Run Mashing proces
while get_variable('active_mashingprocess_batch_id', 'None') == str(batch.id):
# Measure data
measured_data = {}
if settings.ARDUINO_SIMULATION:
measured_data['temp'] = get_dummy_temperature(batch)
else:
sensor.requestTemperatures()
measured_data['temp'] = sensor.getTempC(addr)
# Define actions depending on measured data
batch = process_measured_data(batch.id, measured_data)
# Send updates to arduino
if not settings.ARDUINO_SIMULATION:
send_updates_to_arduino(batch)
# Send to logging department
handle_logging(batch)
# Delay
sleep(DELAY_BETWEEN_MEASUREMENTS)
Arduino.digitalWrite(ARDUINO_STATUS_PIN, Arduino.LOW)
Arduino.digitalWrite(ARDUINO_COOL_PIN, Arduino.LOW)
Arduino.digitalWrite(ARDUINO_HEAT_PIN, Arduino.LOW)
return 'Mashing proces ended'
