MQ135 gas sensor

arduino.ino

int sensorValue;

void setup(void) {
    Serial.begin(9600);
}

void loop(void) {
    // If we get a ping from the PC, dump the data
    if (Serial.available()) {
        byte a = Serial.read();
        if (a == 'g') { // gas sensor
            sensorValue = analogRead(0);       
            Serial.println(sensorValue, DEC);
        }
        else if (a == 'l') { // light sensor
            sensorValue = analogRead(5);
            float Rsensor;
            //Rsensor=(float)(1023-sensorValue)*10/sensorValue;
            Serial.println(sensorValue);
        }
        Serial.println();
    }
}

cosm_credentials.py

cosm = {
    "feed_id": "<11111>",
    "api_key": "<COSM KEY>",
}

cosm_upload.py

#!/usr/bin/env python2.7
"""
Reads out the gas MQ135 sensor from serial and posts them to https://cosm.com/feeds/xxxx
- http://wiring.org.co/learning/basics/airqualitymq135.html
"""

import serial
import json
import requests
import time
import sys

from cosm_credentials import cosm

#the current time for the datapoint
curr_time = time.strftime("%Y-%m-%dT%H:%M:%SZ%z", time.gmtime())

#set up the serial 
ser = serial.Serial("/dev/ttyUSB1", timeout=10)

# ask for gas sensor data
ser.flushInput()
time.sleep(10)
ser.write("g") #gas sensor

#read the data
while True:
    line = ser.readline()

    if not line or line == '\r\n':
        break

    sensor_value = line.strip()

    url="http://api.cosm.com/v2/feeds/%s/datastreams/%s/datapoints" % (cosm['feed_id'], "hacklab_airquality")
    headers = {'X-ApiKey':cosm['api_key']}
    payload = {'datapoints': [{'at': curr_time, 'value': sensor_value}]}

    print payload
    requests.post(url, data=json.dumps(payload), headers=headers)


# ask for light sensor data
ser.flushInput()
time.sleep(10)
ser.write("l") #gas sensor

#read the data
while True:
    line = ser.readline()

    if not line or line == '\r\n':
        break

    sensor_value = line.strip()

    url="http://api.cosm.com/v2/feeds/%s/datastreams/%s/datapoints" % (cosm['feed_id'], "hacklab_light_hwroom")
    headers = {'X-ApiKey':cosm['api_key']}
    payload = {'datapoints': [{'at': curr_time, 'value': sensor_value}]}

    print payload
    requests.post(url, data=json.dumps(payload), headers=headers)

Hi ...can anyone pls send code for mq135 gas detecting sensor with arduino uno ...pls help us..send to' Indira.sandhireddy441@gmail.com'