data_local.py

"""
Title: Gathering Analog Data Without Hardware
Created on Thu Oct 10 14:49:20 2017
Modified:
@author: Kevin Machado Gamboa
Ref: Raspberry pi Cookbook 1 for python programmers. chapter 7 Pag. 205
"""
# !/usr/bin/env python3
# data_local.py
# -----------------------------------------------------------------------------
## Importing modules and creating variables
import subprocess
from random import randint
import time
MEM_TOTAL=0
MEM_USED=1
MEM_FREE=2
MEM_OFFSET=7
DRIVE_USED=0
DRIVE_FREE=1
DRIVE_OFFSET=9
DEBUG=False
DATANAME=["CPU_Load","System_Temp","CPU_Frequency",
          "Random","RAM_Total","RAM_Used","RAM_Free",
          "Drive_Used","Drive_Free"]

def read_loadavg():
    # function to read 1 minute load average from system uptime
    value = subprocess.check_output(
        ["awk '{print $1}' /proc/loadavg"], shell=True)
    return float(value)

def read_systemp():
    # function to read current system temperature
    value = subprocess.check_output(
        ["cat /sys/class/thermal/thermal_zone0/temp"],
        shell=True)
    return int(value)

def read_cpu():
    # function to read current clock frequency
    value = subprocess.check_output(
        ["cat /sys/devices/system/cpu/cpu0/cpufreq/"+
         "scaling_cur_freq"], shell=True)
    return int(value)

def read_rnd():
    return randint(0,255)

def read_mem():
    # function to read RAM info
    value = subprocess.check_output(["free"], shell=True)
    memory=[]
    for val in value.split()[MEM_TOTAL+
                             MEM_OFFSET:MEM_FREE+
                             MEM_OFFSET+1]:
        memory.append(int(val))
        return(memory)

def read_drive():
    # function to read drive info
    value = subprocess.check_output(["df"], shell=True)
    memory=[]
    for val in value.split()[DRIVE_USED+
                             DRIVE_OFFSET:DRIVE_FREE+
                             DRIVE_OFFSET+1]:
        memory.append(int(val))
        return(memory)

class device:
    # Constructor:
    def __init__(self,addr=0):
        self.NAME=DATANAME
        
    def getName(self):
        return self.NAME

    def getNew(self):
        data=[]
        data.append(read_loadavg())
        data.append(read_systemp())
        data.append(read_cpu())
        data.append(read_rnd())
        memory_ram = read_mem()
        data.append(memory_ram[MEM_TOTAL])
        data.append(memory_ram[MEM_USED])
        data.append(memory_ram[MEM_FREE])
        memory_drive = read_drive()
        data.append(memory_drive[DRIVE_USED])
        data.append(memory_drive[DRIVE_FREE])
        return data

def main():
    LOCAL = device()
    print (str(LOCAL.getName()))

    for i in range(10):
        dataValues = LOCAL.getNew()
        print (str(dataValues))
        time.sleep(1)

if __name__=='__main__':
    main()
            #End