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HWcontrol.py
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# -*- coding: utf-8 -*-
from __future__ import print_function
from __future__ import division
from builtins import str
from builtins import hex
from builtins import range
from past.utils import old_div
import time
import datetime
import threading
from math import sqrt
#import sys,os
#import serial
#import os
import glob
import logging
import subprocess
from GPIOEXPI2Ccontrol import tonumber
logger = logging.getLogger("hydrosys4."+__name__)
global ISRPI
try:
__import__("smbus")
except ImportError:
ISRPI=False
else:
import sys, os
basepath=os.getcwd()
libpath="libraries/BMP/bmp180" # should be without the backslash at the beginning
sys.path.append(os.path.join(basepath, libpath)) # this adds new import paths to add modules
from grove_i2c_barometic_sensor_BMP180 import BMP085
libpath="libraries/BMP/bme280" # should be without the backslash at the beginning
sys.path.append(os.path.join(basepath, libpath)) # this adds new import paths to add modules
import bme280
libpath="libraries/MotorHat" # should be without the backslash at the beginning
sys.path.append(os.path.join(basepath, libpath)) # this adds new import paths to add modules
from stepperDOUBLEmod import Adafruit_MotorHAT, Adafruit_DCMotor, Adafruit_StepperMotor
import Adafruit_DHT #humidity temperature sensor
#from Adafruit_MotorHAT import Adafruit_MotorHAT, Adafruit_DCMotor, Adafruit_StepperMotor
import spidev
import smbus
import Hygro24_I2C
import hx711_AV
import SlowWire
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
ISRPI=True
HWCONTROLLIST=["tempsensor","humidsensor","pressuresensor","analogdigital","lightsensor","pulse","pinstate","servo","stepper","stepperstatus","photo","mail+info+link","mail+info","returnzero","stoppulse","readinputpin","hbridge","empty","DS18B20","Hygro24_I2C","HX711","SlowWire","InterrFreqCounter","WeatherAPI","BME280_temperature","BME280_humidity","BME280_pressure","BMP180_temperature","RPI_Core_temperature","switchoff","switchon"]
RPIMODBGPIOPINLIST=["1","2", "3", "4","5","6", "7", "8", "9", "10", "11", "12","13","14", "15", "16","17", "18", "19", "20","21","22", "23", "24", "25","26", "27"]
NALIST=["N/A"]
GPIOPLUSLIST=["I2C", "SPI", "SPI2"]
RPIMODBGPIOPINLISTNA=NALIST+RPIMODBGPIOPINLIST
RPIMODBGPIOPINLISTPLUS=RPIMODBGPIOPINLISTNA+GPIOPLUSLIST
ADCCHANNELLIST=["N/A","0","1","2","3","4","5","6","7"] #MCP3008 chip has 8 input channels
# status variables
DHT22_data={}
DHT22_data["default"]={'temperature':None,'humidity':None,'lastupdate':datetime.datetime.utcnow() - datetime.timedelta(seconds=2)}
stepper_data={}
stepper_data["default"]={'busyflag':False}
GPIO_data={}
GPIO_data["default"]={"level":None, "state":None, "threadID":None}
PowerPIN_Status={}
PowerPIN_Status["default"]={"level":0, "state":"off", "pinstate":None}
#" GPIO_data is an array of dictionary, total 40 items in the array
#GPIO_data=[{"level":None, "state":None, "threadID":None} for k in range(40)]
#" PowerPIN_Status is an array of dictionary, total 40 items in the array, the array is used to avoid comflict between tasks using same PIN
# each time the pin is activated the level is increased by 1 unit.
#PowerPIN_Status=[{"level":0, "state":"off", "pinstate":None} for k in range(40)]
MCP3008_busy_flag=False
def toint(thestring, outwhenfail):
try:
f=float(thestring)
n=int(f)
return n
except:
return outwhenfail
def returnmsg(recdata,cmd,msg,successful):
recdata.clear()
print(msg)
recdata.append(cmd)
recdata.append(msg)
recdata.append(successful)
if not successful:
logger.error("Error: %s" ,msg)
return True
def read_status_data(data,element,variable):
#print data
if element in data:
#print " element present"
elementdata=data[element]
if variable in elementdata:
return elementdata[variable]
else:
# variable not in elementdata
return ""
else:
#print " element NOT present"
# element not present in the data use the default
data[element]=data["default"].copy()
elementdata=data[element]
#print data
if variable in elementdata:
return elementdata[variable]
else:
# variable not in elementdata
return ""
def read_status_dict(data,element):
#print data
if element in data:
#print " element present"
elementdata=data[element]
return elementdata
else:
#print " element NOT present"
return {}
def write_status_data(data,element,variable,value):
if element in data:
data[element][variable]=value
else:
data[element]=data["default"].copy()
data[element][variable]=value
def execute_task(cmd, message, recdata):
global DHT22_data
global Servo_data
global stepper_data
global hbridge_data
print(" RASPBERRY HARDWARE CONTROL ")
if cmd==HWCONTROLLIST[0]:
return get_DHT22_temperature(cmd, message, recdata , DHT22_data)
elif cmd==HWCONTROLLIST[1]:
return get_DHT22_humidity(cmd, message, recdata , DHT22_data)
elif cmd==HWCONTROLLIST[2]:
return get_BMP180_data(cmd, message, recdata, "pressure")
elif cmd==HWCONTROLLIST[3]:
retok=get_MCP3008_channel(cmd, message, recdata)
return retok
elif cmd==HWCONTROLLIST[4]:
return get_BH1750_light(cmd, message, recdata)
elif cmd==HWCONTROLLIST[5]: # pulse
return gpio_pulse(cmd, message, recdata)
elif cmd==HWCONTROLLIST[6]: # pinstate
return gpio_pin_level(cmd, message, recdata)
elif cmd==HWCONTROLLIST[7]: # servo
return gpio_set_servo(cmd, message, recdata)
elif cmd==HWCONTROLLIST[8]: #stepper
return gpio_set_stepper(cmd, message, recdata, stepper_data)
elif cmd==HWCONTROLLIST[9]: #stepper status
return get_stepper_status(cmd, message, recdata, stepper_data)
elif cmd==HWCONTROLLIST[13]: #return zero
#print "returnzero"
returndata="0"
returnmsg(recdata,cmd,returndata,1)
return True
elif cmd==HWCONTROLLIST[14]: # stoppulse
return gpio_stoppulse(cmd, message, recdata)
elif cmd==HWCONTROLLIST[15]: # readinputpin
return read_input_pin(cmd, message, recdata)
elif cmd==HWCONTROLLIST[16]: #hbridge
return ""
elif cmd==HWCONTROLLIST[17]: #hbridge status
return ""
elif cmd==HWCONTROLLIST[18]: #DS18B20 temperature sensor
return get_DS18B20_temperature(cmd, message, recdata)
elif cmd==HWCONTROLLIST[19]: #Hygro24_I2C temperature sensor
return get_Hygro24_capacity(cmd, message, recdata)
elif cmd==HWCONTROLLIST[20]: #HX711 cell loads amplifier, for weight sensor
return get_HX711_voltage(cmd, message, recdata)
elif cmd==HWCONTROLLIST[21]: #SlowWire , Digital Hygrometer
return get_SlowWire_reading(cmd, message, recdata)
elif cmd==HWCONTROLLIST[22]: # Interrupt frequency counter
return get_InterruptFrequency_reading(cmd, message, recdata)
elif cmd==HWCONTROLLIST[23]: # weather API counter
return get_WeatherAPI_reading(cmd, message, recdata)
elif cmd==HWCONTROLLIST[24]: # BME280
return get_BME280_data(cmd, message, recdata, "temperature")
elif cmd==HWCONTROLLIST[25]: # BME280
return get_BME280_data(cmd, message, recdata, "humidity")
elif cmd==HWCONTROLLIST[26]: # BME280
return get_BME280_data(cmd, message, recdata, "pressure")
elif cmd==HWCONTROLLIST[27]:
return get_BMP180_data(cmd, message, recdata, "temperature")
elif cmd==HWCONTROLLIST[28]:
return get_RPI_Core_temperature(cmd, message, recdata)
elif cmd==HWCONTROLLIST[29]:
return gpio_switchoff(cmd, message, recdata)
elif cmd==HWCONTROLLIST[30]:
return gpio_switchon(cmd, message, recdata)
else:
returnmsg(recdata,cmd,"Command not found",0)
return False
return False
def execute_task_fake(cmd, message, recdata):
if cmd==HWCONTROLLIST[0]:
get_DHT22_temperature_fake(cmd, message, recdata, DHT22_data)
return True;
elif cmd==HWCONTROLLIST[5]:
gpio_pulse(cmd, message, recdata)
return True;
elif cmd==HWCONTROLLIST[6]:
gpio_pin_level(cmd, message, recdata)
return True;
elif cmd==HWCONTROLLIST[14]:
gpio_stoppulse(cmd, message, recdata)
return True;
else:
returnmsg(recdata,cmd,"Fake command not found",0)
return False
return True
def get_1wire_devices_list():
device_folder_list=[]
outlist=[]
base_dir = '/sys/bus/w1/devices/'
lbs=len(base_dir)
device_folder_list = glob.glob(base_dir+"*")
for item in device_folder_list:
strout=item[lbs:]
if strout[0].isdigit():
outlist.append(strout)
return outlist
def get_I2C_devices_list():
device_list=[]
bus_number = 1 # 1 indicates /dev/i2c-1
bus = smbus.SMBus(bus_number)
timeout=4 #seconds
now = time.time()
for device in range(3, 128):
try:
bus.write_byte(device, 0)
device_list.append("{0}".format(hex(device)))
except:
print("I2C bus not working")
a=1
later = time.time()
difference = int(later - now)
print("I2C address", hex(device) , " Scan Time passed", difference)
if difference>timeout:
logger.warning("Timeout Error, not able to scan the I2C devices")
break
bus.close()
bus = None
return device_list
def get_DHT22_temperature_fake(cmd, message, recdata, DHT22_data):
returnmsg(recdata,cmd,"10.10",1)
return True
def get_DHT22_reading(cmd, message, recdata, DHT22_data):
successflag=0
errormsg=""
msgarray=message.split(":")
pin=int(msgarray[1])
element=msgarray[1]
TemperatureUnit="C"
if len(msgarray)>4:
TemperatureUnit=msgarray[4]
lastupdate=read_status_data(DHT22_data,element,'lastupdate')
deltat=datetime.datetime.utcnow()-lastupdate
if deltat.total_seconds()<0:
logger.warning("last reading DHT sensor was in the past? maybe due to time change, go to reset lastupdate time")
lastupdate=datetime.datetime.utcnow() - datetime.timedelta(seconds=3)
DHT22_data[element]['lastupdate']=lastupdate
deltat=datetime.datetime.utcnow()-lastupdate
if deltat.total_seconds()>3:
humidity=None
temperature=None
readingattempt=3
inde=0
while (inde<readingattempt) and (successflag==0):
inde=inde+1
try:
sensor = Adafruit_DHT.DHT22
humidity, temperature = Adafruit_DHT.read(sensor, pin)
if (TemperatureUnit=="F") and (temperature is not None):
temperature=temperature*1.8+32
except:
print("error reading the DHT sensor (Humidity,Temperature)")
logger.error("error reading the DHT sensor (Humidity,Temperature)")
# if reading OK, update status variable
if (humidity is not None) and (temperature is not None):
# further checks
if (humidity>=0)and(humidity<=100)and(temperature>-20)and(temperature<200):
temperaturestr=('{:3.2f}'.format(temperature))
humiditystr=('{:3.2f}'.format(humidity))
DHT22_data[element]['temperature']=temperaturestr
DHT22_data[element]['humidity']=humiditystr
DHT22_data[element]['lastupdate']=datetime.datetime.utcnow()
successflag=1
print('Temp={0:0.1f}*C Humidity={1:0.1f}%'.format(temperature, humidity))
else:
print('Failed to get DHT22 reading')
logger.error("Failed to get DHT22 reading, values in wrong range")
else:
print('Failed to get DHT22 reading')
logger.error("Failed to get DHT22 reading")
time.sleep(1)
if not successflag:
errormsg="Failed 3 attemps to get DHT22 reading"
print(errormsg)
logger.error(errormsg)
temperaturestr=errormsg
humiditystr=errormsg
# data in status variable will not be used in case of failure reading, only in case of reading request less than 10sec
else:
# use the data in memory, reading less than 10 sec ago
temperaturestr=read_status_data(DHT22_data,element,'temperature')
humiditystr=read_status_data(DHT22_data,element,'humidity')
if (humiditystr!="") and (temperaturestr!=""):
successflag=1
else:
errormsg="No DHT22 data in Buffer"
print(errormsg)
logger.error(errormsg)
temperaturestr=errormsg
humiditystr=errormsg
return successflag, temperaturestr, humiditystr
def get_DHT22_temperature(cmd, message, recdata, DHT22_data):
successflag , temperaturestr, humiditystr =get_DHT22_reading(cmd, message, recdata, DHT22_data)
returnmsg(recdata,cmd,temperaturestr,successflag)
return True
def get_DHT22_humidity(cmd, message, recdata, DHT22_data):
successflag , temperaturestr, humiditystr =get_DHT22_reading(cmd, message, recdata, DHT22_data)
returnmsg(recdata,cmd,humiditystr,successflag)
return True
def get_BMP180_data(cmd, message, recdata, datatype):
successflag=0
reading=0
msgarray=message.split(":")
measureUnit=""
if len(msgarray)>4:
measureUnit=msgarray[4]
SensorAddress="0x77"
if len(msgarray)>6:
if msgarray[6]!="":
SensorAddress=msgarray[6]
# Initialise the BMP085 and use STANDARD mode (default value)
# bmp = BMP085(0x77, debug=True)
# bmp = BMP085(0x77, 1)
# To specify a different operating mode, uncomment one of the following:
# bmp = BMP085(0x77, 0) # ULTRALOWPOWER Mode
# bmp = BMP085(0x77, 1) # STANDARD Mode
# bmp = BMP085(0x77, 2) # HIRES Mode
Hiresmode=3
bmp = BMP085(int(SensorAddress, 0), Hiresmode) # ULTRAHIRES Mode
#temp = bmp.readTemperature()
try:
if datatype=="pressure":
isok, reading = bmp.readPressure()
if isok:
reading = '{0:0.2f}'.format(reading/100) # the reading is in Hpa
successflag=1
if datatype=="temperature":
isok, reading = bmp.readTemperature()
if isok:
if (measureUnit=="F"):
reading=reading*1.8+32
reading = '{0:0.2f}'.format(reading)
successflag=1
except:
#print " I2C bus reading error, BMP180 , pressure sensor "
msg=" I2C bus reading error, BMP180 sensor " + datatype
returnmsg(recdata,cmd,msg,0)
#pressure is in hecto Pascal
returnmsg(recdata,cmd,reading,successflag)
return True
def get_BME280_data(cmd, message, recdata, datatype):
# datatype can be "temperature", "humidity", "pressure"
successflag=0
Pressure=0
Temperature=0
Humidity=0
msgarray=message.split(":")
measureUnit=""
if len(msgarray)>4:
measureUnit=msgarray[4]
SensorAddress="0x76"
if len(msgarray)>6:
if msgarray[6]!="":
SensorAddress=msgarray[6]
I2C_bus="1"
bme280.bme280_i2c.create_bus(int(SensorAddress, 0),int(I2C_bus))
isok, msg = bme280.setup()
if not isok:
returnmsg(recdata,cmd,msg,0)
return True
data_all = bme280.read_all()
print("here we are with BME :", data_all)
if data_all:
if datatype in data_all:
reading=data_all[datatype]
# convert to farenheit
if datatype=="temperature":
if (measureUnit=="F"):
reading=reading*1.8+32
successflag=1
logger.info("BME280 %s reading: %s", datatype, reading)
print("BME280 ", datatype, " reading: ", reading)
returnmsg(recdata,cmd,reading,successflag)
statusmsg=""
recdata.append(statusmsg)
return True
msg="Generic Error, BME280"
returnmsg(recdata,cmd,msg,0)
return True
def get_BH1750_light(cmd, message, recdata):
successflag=0
msgarray=message.split(":")
measureUnit=""
if len(msgarray)>4:
measureUnit=msgarray[4]
SensorAddress="0x23"
if len(msgarray)>6:
if msgarray[6]!="":
SensorAddress=msgarray[6]
#DEVICE = 0x23 # Default device I2C address
DEVICE = int(SensorAddress,0)
POWER_DOWN = 0x00 # No active state
POWER_ON = 0x01 # Power on
RESET = 0x07 # Reset data register value
# Start measurement at 4lx resolution. Time typically 16ms.
CONTINUOUS_LOW_RES_MODE = 0x13
# Start measurement at 1lx resolution. Time typically 120ms
CONTINUOUS_HIGH_RES_MODE_1 = 0x10
# Start measurement at 0.5lx resolution. Time typically 120ms
CONTINUOUS_HIGH_RES_MODE_2 = 0x11
# Start measurement at 1lx resolution. Time typically 120ms
# Device is automatically set to Power Down after measurement.
ONE_TIME_HIGH_RES_MODE_1 = 0x20
# Start measurement at 0.5lx resolution. Time typically 120ms
# Device is automatically set to Power Down after measurement.
ONE_TIME_HIGH_RES_MODE_2 = 0x21
# Start measurement at 1lx resolution. Time typically 120ms
# Device is automatically set to Power Down after measurement.
ONE_TIME_LOW_RES_MODE = 0x23
bus = smbus.SMBus(1) # Rev 2 Pi uses 1
light=0
try:
data = bus.read_i2c_block_data(DEVICE,ONE_TIME_HIGH_RES_MODE_1)
light = '{0:0.2f}'.format((old_div((data[1] + (256 * data[0])), 1.2)))
successflag=1
except:
#print " I2C bus reading error, BH1750 , light sensor "
msg=" I2C bus reading error, BH1750 , light sensor "
returnmsg(recdata,cmd,msg,0)
return True
returnmsg(recdata,cmd,light,successflag)
return True
def get_RPI_Core_temperature(cmd, message, recdata):
# uses the OS commands to get the SoC core temperature
successflag=0
msgarray=message.split(":")
# needed to provide the temperature in celsius or Farehneit
TemperatureUnit="C"
if len(msgarray)>4:
TemperatureUnit=msgarray[4]
temperature=0
oscmd = ["vcgencmd", "measure_temp"]
wordtofind="temp="
try:
result=subprocess.run(oscmd, capture_output="True", text="True")
scanoutput=result.stdout
except:
msg=" Error reading the RPI internal temperature "
returnmsg(recdata,cmd,msg,0)
return True
for line in scanoutput.split('\n'):
#print " line ",line
strstart=line.find(wordtofind)
if strstart>-1:
substr=line[(strstart+len(wordtofind)):]
lastdigit =[i for i in range(len(substr)) if substr[i].isdigit()].pop()
substr=substr[:lastdigit+1]
print (substr)
try:
temperature=float(substr)
if (TemperatureUnit=="F") and (temperature is not None):
temperature=temperature*1.8+32
temperature=('{:3.2f}'.format(temperature))
successflag=1
except:
msg=" Error reading the RPI internal temperature "
returnmsg(recdata,cmd,msg,0)
return True
returnmsg(recdata,cmd,temperature,successflag)
return True
def get_DS18B20_temperature(cmd, message, recdata):
successflag=0
# this sensors uses the one wire protocol. Multiple sensors can be connected to the same wire and they can be distinguished using an Address which is the mane of the file
# in this algorithm, the message should include the address, if the address field is empty then it gets the first reading available.
msgarray=message.split(":")
TemperatureUnit="C"
if len(msgarray)>4:
TemperatureUnit=msgarray[4]
SensorAddress=""
if len(msgarray)>6:
SensorAddress=msgarray[6]
temperature=0
# These tow lines mount the device:
#os.system('modprobe w1-gpio')
#os.system('modprobe w1-therm')
base_dir = '/sys/bus/w1/devices/'
# Get all the filenames begin with 28 in the path base_dir.
device_folder_list = glob.glob(base_dir + '28*')
SensorAddress=SensorAddress.strip()
isOK=False
if device_folder_list:
device_folder=device_folder_list[0]
if SensorAddress!="":
for item in device_folder_list:
if SensorAddress in item:
device_folder=item
isOK=True
break
else:
isOK=True
if not isOK:
# address of the termometer not found
msg="DS18B20 address not found: " + SensorAddress
returnmsg(recdata,cmd,msg,0)
return True
device_file = device_folder + '/w1_slave'
#below commands reads the DS18B20 rom, which effectively is the address
#name_file=device_folder+'/name'
#f = open(name_file,'r')
#RomReading=f.readline()
f = open(device_file, 'r')
lines = f.readlines()
f.close()
if len(lines)>1:
if ("YES" in lines[0].upper()):
#first row found and OK
# Find the index of 't=' in a string.
equals_pos = lines[1].find('t=')
if equals_pos != -1:
# Read the temperature .
temp_string = lines[1][equals_pos+2:] # takes the right part of the string
try:
temperature = old_div(float(temp_string), 1000.0)
if (TemperatureUnit=="F") and (temperature is not None):
temperature=temperature*1.8+32
temperature=('{:3.2f}'.format(old_div(temperature, 1.)))
successflag=1
except:
#print "error reading the DS18B20"
logger.error("error reading the DS18B20")
returnmsg(recdata,cmd,temperature,successflag)
return True
def get_HX711_voltage(cmd, message, recdata):
#print "starting HX711 reading ****"
successflag=0
# this sensors uses the I2C protocol. Multiple sensors can be connected and can be distinguished using an Address
# in this algorithm, the message should include the address, if the address field is empty then it gets the default address 0x20.
msgarray=message.split(":")
PINDATA_str=""
if len(msgarray)>1:
PINDATA_str=msgarray[1]
measureUnit=""
if len(msgarray)>4:
measureUnit=msgarray[4]
SensorAddress="0x20"
if len(msgarray)>6:
SensorAddress=msgarray[6]
PINCLK_str=""
if len(msgarray)>7:
PINCLK_str=msgarray[7]
PINDATA=toint(PINDATA_str,-1)
PINCLK=toint(PINCLK_str,-1)
if (PINDATA<0)or(PINCLK<0):
msg="HX711 PIN not valid" + SensorAddress
logger.error("HX711 PIN not valid: Pindata = %s Pinclk= %s", PINDATA_str,PINCLK_str)
returnmsg(recdata,cmd,msg,0)
return True
reading=0
bus = 1
HX711_hardware = hx711_AV.HX711(dout_pin=PINDATA, pd_sck_pin=PINCLK)
# start reading multimple sample and making some filtering and average
datatext=""
inde =0
dataarray=[]
#print "Starting sample reading"
samplesnumber=25
for x in range(0, samplesnumber): #number of samples
# read data
isok,data = HX711_hardware.read()
if isok:
dataarray.append(data)
inde=inde+1
datatext=datatext+str(data)+","
#print "HX711 data:",data
if inde==0:
msg="HX711 reading error"
returnmsg(recdata,cmd,msg,0)
return True
successflag=1
logger.info("HX711 Channel: %s", HX711_hardware.get_current_channel())
logger.info("HX711 Channel: %d", HX711_hardware.get_current_gain_A())
averagefiltered, average = normalize_average(dataarray)
print("HX711 data Average: ",average , " Average filtered: ", averagefiltered)
reading=averagefiltered
returnmsg(recdata,cmd,reading,successflag)
return True
def get_SlowWire_reading(cmd, message, recdata):
#print "starting SlowWire reading ****"
successflag=0
# this sensors uses the SlowWire protocol which is similar to one wire but with relaxed times and single Sensor per wire.
# The relaxed timing allow longer cable distances, for application like hygrometers which do not require speed.
msgarray=message.split(":")
PINDATA_str=""
if len(msgarray)>1:
PINDATA_str=msgarray[1]
measureUnit=""
if len(msgarray)>4:
measureUnit=msgarray[4]
PINDATA=toint(PINDATA_str,-1)
if (PINDATA<0):
# address not correct
msg="SlowWire PIN not valid: Pindata = " + PINDATA_str
returnmsg(recdata,cmd,msg,0)
return True
reading=0
Sensor_bus = SlowWire.SlowWire(dout_pin=PINDATA)
# start reading multimple sample and making some filtering and average
#print "Starting sample reading"
ReadingAttempt=3
inde=0
while (ReadingAttempt>0)and(inde==0):
datatext=""
inde=0
dataarray=[]
samplesnumber=1
for x in range(0, samplesnumber): #number of samples
# read data
isok,datalist = Sensor_bus.read_uint()
if isok:
data=datalist[0]
dataarray.append(data)
inde=inde+1
datatext=datatext+str(data)+","
#print "SlowWire data:",data
ReadingAttempt=ReadingAttempt-1
if inde==0:
msg="SlowWire reading error"
returnmsg(recdata,cmd,msg,0)
return True
successflag=1
averagefiltered, average = normalize_average(dataarray)
print("SlowWire data Average: ",average , " Average filtered: ", averagefiltered)
reading=averagefiltered
returnmsg(recdata,cmd,reading,successflag)
return True
def get_Hygro24_capacity(cmd, message, recdata):
#print "starting Hygro24_I2C reading ****"
successflag=0
# this sensors uses the I2C protocol. Multiple sensors can be connected and can be distinguished using an Address
# in this algorithm, the message should include the address, if the address field is empty then it gets the default address 0x20.
msgarray=message.split(":")
measureUnit=""
if len(msgarray)>4:
measureUnit=msgarray[4]
SensorAddress="0x20"
if len(msgarray)>6:
SensorAddress=msgarray[6]
if SensorAddress=="":
SensorAddress="0x20" # try with default address
try:
if SensorAddress.startswith("0x"):
SensorAddressInt = int(SensorAddress, 16)
else:
SensorAddressInt = int(SensorAddress)
except:
msg="Hygro24_I2C address incorrect: " + SensorAddress
returnmsg(recdata,cmd,msg,0)
return True
reading=0
bus = 1
chirp = Hygro24_I2C.ChirpAV(bus, SensorAddressInt)
isOK , reading=chirp.read_capacity()
# need to add control in case there is an error in reading
print("reading ", reading)
if isOK:
successflag=1
else:
msg="Hygro24_I2C reading error"
returnmsg(recdata,cmd,msg,0)
return True
returnmsg(recdata,cmd,reading,successflag)
return True
def get_MCP3008_channel(cmd, message, recdata):
successflag=0
volts=0
msgarray=message.split(":")
messagelen=len(msgarray)
PIN=msgarray[1]
SUBPIN=int(msgarray[2])
channel=SUBPIN
POWERPIN=""
if messagelen>3:
POWERPIN=msgarray[3]
logic="pos"
if messagelen>5:
logic=msgarray[5]
global MCP3008_busy_flag
waitstep=0.1
waittime=0
maxwait=2.5
while (MCP3008_busy_flag==True)and(waittime<maxwait):
time.sleep(waitstep)
waittime=waittime+waitstep
#print "MCP3008 wait time -----> ", waittime
if (waittime>=maxwait):
#something wrog, wait too long, avoid initiate further processing
msg="Wait Time exceeded, not able to read ADCdata Channel: "+str(channel)
returnmsg(recdata,cmd,msg,0)
return True
MCP3008_busy_flag=True
powerPIN_start(POWERPIN,logic,2)
refvoltage=5.0
try:
# Open SPI bus
spi_speed = 1000000 # 1 MHz
spi = spidev.SpiDev()
if PIN == "SPI2":
spi.open(0,1)
else:
spi.open(0,0)
spi.max_speed_hz=spi_speed
# Function to read SPI data from MCP3008 chip
# Channel must be an integer 0-7
datatext=""
inde =0
dataarray=[]
#print "Starting sample reading"