project: reorder

Signed-off-by: Thomas Klaehn <thomas.klaehn@u-blox.com>
This commit is contained in:
Thomas Klaehn
2017-03-30 15:15:00 +02:00
parent e541023bba
commit 4646c7d7a6
14 changed files with 24 additions and 125 deletions

21
gate_guard/__init__.py Normal file
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'''
Created on Dec 19, 2016
@author: klaehn
'''
import time
import gate
def main():
gate_state = gate.Gate()
try:
while True:
gate_state.poll()
time.sleep(0.1)
except KeyboardInterrupt:
print "key exit"
return None
if __name__ == "__main__":
sys.exit(main())

29
gate_guard/data_buffer.py Normal file
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'''
Created on Mar 30, 2017
@author: tkla
'''
class DataBuffer(object):
def __init__(self, length):
self.__max = length
self.__data = []
def push(self, element):
if self.__max == 0:
return False
if len(self.__data) == self.__max:
_ = self.__data.pop(0)
self.__data.append(element)
return True
def average(self):
if len(self.__data) is 0:
return None
return sum(self.__data) / len(self.__data)
def length(self):
return len(self.__data)
def clear(self):
self.__data = []

29
gate_guard/engine.py Normal file
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'''
Created on Mar 30, 2017
@author: tkla
'''
import gpio
class Engine(object):
def __init__(self, gpio_1 = 13, gpio_2 = 19):
self.gpio_1 = gpio.Gpio(gpio_1)
self.gpio_2 = gpio.Gpio(gpio_2)
self.gpio_1.export()
self.gpio_1.direction(gpio.Gpio.DIRECTION_OUT)
self.gpio_2.export()
self.gpio_2.direction(gpio.Gpio.DIRECTION_OUT)
self.stop()
def stop(self):
self.gpio_1.set(0)
self.gpio_2.set(0)
def up(self):
self.gpio_1.set(1)
self.gpio_2.set(0)
def down(self):
self.gpio_1.set(0)
self.gpio_2.set(1)

179
gate_guard/gate.py Normal file
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'''
Created on Dec 19, 2016
@author: klaehn
'''
import time
import mqtt
import data_buffer
import light_sensor
import engine
import power_sensor
from numpy.core.umath import power
STATE_INIT = "init"
STATE_OPENED = "open"
STATE_CLOSED = "close"
STATE_OPENING = "opening"
STATE_CLOSING = "closing"
STATE_ERROR = "error"
LIGHT_READ_DELAY_S = 30
LIGHT_CONSECUTIVE_READS = 10
LIGHT_LX_THRESHOLD = {"open":10, "close":5}
MQTT_HOST = "proxy"
MQTT_TOPIC = "outdoor/chickenhouse/newgate"
LIGHT_SENSOR_I2C_BUS = 1
LIGHT_SENSOR_I2C_ADDRESS = 0x23
POWER_SENSOR_I2C_BUS = 1
POWER_SENSOR_I2C_ADDRESS = 0x40
POWER_CONSECUTIVE_READS = 1000
MAX_ENGINE_POWER = {"up":330, "down":280}
MAX_GATE_RUNTIME = {"open":300, "close":300}
MIN_GATE_RUNTIME = {"open":10, "close":10}
class Gate(object):
def __init__(self):
self.__state_handler = {STATE_INIT:self.__init_handler, \
STATE_OPENED:self.__opened_handler, \
STATE_CLOSED:self.__closed_handler, \
STATE_OPENING:self.__opening_handler, \
STATE_CLOSING:self.__closing_handler, \
STATE_ERROR:self.__error_handler}
self.__next_state = STATE_INIT
self.__last_state = STATE_ERROR
self.__light_sensor = light_sensor.LightSensor(LIGHT_SENSOR_I2C_BUS, \
LIGHT_SENSOR_I2C_ADDRESS)
self.__light_data = data_buffer.DataBuffer(LIGHT_CONSECUTIVE_READS)
self.__comserver = mqtt.Mqtt(MQTT_HOST)
self.__engine = engine.Engine(gpio_1=13, gpio_2=19)
self.__power_sensor = power_sensor.PowerSensor(POWER_SENSOR_I2C_BUS, \
POWER_SENSOR_I2C_ADDRESS)
self.__power_data = data_buffer.DataBuffer(POWER_CONSECUTIVE_READS)
self.__gate_move_timeout = 0
self.__light_read_timeout = 0
self.__error_count = 0
self.__runtime_open = 0
self.__runtime_close = 0
def poll(self):
current_time = time.time()
if current_time >= self.__light_read_timeout:
self.__light_read_timeout = current_time + LIGHT_READ_DELAY_S
self.__light_data.push(self.__light_sensor.read())
self.__state_handler[self.__next_state](self.__light_data.average())
def __update_state(self, new_state):
self.__last_state = self.__next_state
self.__next_state = new_state
def __is_transition(self):
if self.__last_state != self.__next_state:
return True
return False
def __init_handler(self, light_avg):
'''
In init we don't know anything neither about gate state nor about
light. So first we try to reach STATE_OPENED.
'''
#pylint: disable=unused-argument
self.__comserver.connect()
self.__comserver.transmit(MQTT_TOPIC, str(time.time()) + \
" gate gard initiated")
self.__comserver.disconnect()
self.__update_state(STATE_OPENING)
def __opened_handler(self, light_avg):
next_state = self.__next_state
if self.__is_transition():
self.__engine.down()
time.sleep(5)
self.__engine.stop()
self.__comserver.transmit(MQTT_TOPIC, str(time.time()) + \
" Opened " + \
str(self.__power_data.average()) + " mW")
self.__power_data.clear()
if (light_avg != None) and (light_avg <= LIGHT_LX_THRESHOLD["close"]):
next_state = STATE_CLOSING
self.__update_state(next_state)
def __closed_handler(self, light_avg):
next_state = self.__next_state
if self.__is_transition():
self.__engine.up()
time.sleep(5)
self.__engine.stop()
self.__comserver.transmit(MQTT_TOPIC, str(time.time()) + \
" Closed " + \
str(self.__power_data.average()) + " mW")
self.__power_data.clear()
if (light_avg != None) and (light_avg > LIGHT_LX_THRESHOLD["open"]):
next_state = STATE_OPENING
self.__update_state(next_state)
def __opening_handler(self, light_avg):
next_state = self.__next_state
if self.__is_transition():
self.__runtime_open = time.time() + MIN_GATE_RUNTIME["open"]
self.__engine.up()
self.__gate_move_timeout = time.time() + MAX_GATE_RUNTIME["open"]
self.__comserver.transmit(MQTT_TOPIC, str(time.time()) + \
" Opening " + str(light_avg) + " lx")
if time.time() > self.__gate_move_timeout:
next_state = STATE_ERROR
else:
self.__power_data.push(self.__power_sensor.power_mw())
current_avg = self.__power_data.average()
if current_avg != None:
if current_avg > MAX_ENGINE_POWER["up"]:
if time.time() > self.__runtime_open:
next_state = STATE_OPENED
self.__update_state(next_state)
def __closing_handler(self, light_avg):
next_state = self.__next_state
if self.__is_transition():
self.__runtime_close = time.time() + MIN_GATE_RUNTIME["close"]
self.__engine.down()
self.__gate_move_timeout = time.time() + MAX_GATE_RUNTIME["close"]
self.__comserver.transmit(MQTT_TOPIC, str(time.time()) + \
" Closing " + str(light_avg) + " lx")
if time.time() > self.__gate_move_timeout:
next_state = STATE_ERROR
else:
self.__power_data.push(self.__power_sensor.power_mw())
current_avg = self.__power_data.average()
if current_avg != None:
if current_avg > MAX_ENGINE_POWER["down"]:
if time.time() > self.__runtime_close:
next_state = STATE_CLOSED
self.__update_state(next_state)
def __error_handler(self, light_avg):
#pylint: disable=unused-argument
if self.__is_transition():
self.__engine.stop()
self.__comserver.transmit(MQTT_TOPIC, str(time.time()) + \
" Error handler!!!")
self.__update_state(STATE_INIT)

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'''
Created on Mar 30, 2017
@author: tkla
'''
import smbus
class LightSensor(object):
def __init__(self, bus = 1, addr = 0x23):
self.__i2c_device = bus
self.__i2c_addr = addr
self.__i2c_device = smbus.SMBus(self.__i2c_device)
def read(self):
data = self.__i2c_device.read_i2c_block_data(self.__i2c_addr, 0x10)
return int(round((data[0] * 256 + data[1]) / 1.2, 0))

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'''
Created on Dec 19, 2016
@author: klaehn
'''
import smbus
class PowerSensor(object):
'''
Power sensor wrapper
'''
def __init__(self, bus = 1, addr = 0x40):
self.__bus = smbus.SMBus(bus)
self.__addr = addr
value = [(0x1000 >> 8) & 0xFF, 0x1000 & 0xFF]
self.__bus.write_i2c_block_data(self.__addr, 0x05, value)
config = 0x2000 | 0x1800 | 0x0400 | 0x0018 | 0x0007
value = [(config >> 8) & 0xFF, config & 0xFF]
self.__bus.write_i2c_block_data(self.__addr, 0x00, value)
def shunt_voltage_mv(self):
''' Read the voltage at the shunt resistor [mV] '''
data = self.__bus.read_i2c_block_data(self.__addr, 0x01)
voltage = data[0] * 256 + data[1]
return voltage * 0.01
def current_ma(self):
''' Read the current [mA] '''
data = self.__bus.read_i2c_block_data(self.__addr, 0x04)
if data[0] >> 7 == 1:
current = data[0] * 256 + data[1]
if current & (1 << 15):
current = current - (1 << 16)
else:
current = (data[0] << 8) | (data[1])
return current / 10
def power_mw(self):
''' Read the power [mW] '''
data = self.__bus.read_i2c_block_data(self.__addr, 0x03)
if data[0] >> 7 == 1:
power = data[0] * 256 + data[1]
if power & (1 << 15):
power = power - (1 << 16)
else:
power = (data[0] << 8) | (data[1])
return power / 2