Fruits and veggies exhibits different conditions due to subjection of Ethylene (plant hormone or chemical) in to dehydration which results in formation of Ethanol(gas) and water(vapor). This occurs throughout different stages of fruit and veggies. The ethanol concentration will be less in un-ripened ,more in ripened ,and maximum in rotten fruits & veggies .Fruits and veggies even show spoilage through variation in temperature and humidity conditions in their surroundings.
Resulting the to the above the invention was to build embedded device to monitor complete whole fruits and veggies and calibrate the volume of gas produced . Based on this , different thresholds are set for different stages, depending on the gas concentration we can judge conditions of fruits & veggies. Mean while the application even monitors the assigned temperature & humidness condition of a fruits & veggies storage.
The invention of the iot based embedded rot detecting device consists of an a gas sensor and temperature and Humid condition monitoring sensors interfaced with micro wifi model. This assembly on supply of power, continuously monitors the fruits and veggies conditions by sensing the amount of gas released by them and also monitors temperature and humid conditions of their storage and sends this data to the control room through internet protocol. where the fruits and veggies conditions are monitored remotely.
DESCRIPTION ABOUT DRAWING
As shown in Figurel.The application consists of embedded congregation of a MQ3 gas sensor, DHT1 l/22Temperature and Humidity sensor interfaced with a Wi-Fi model ESP-12E. MQ3 gas sensor is a semiconductor type sensor with lower conductivity in clean air. when targeted to alcohol gas exist, its conductivity increases with increase in gas concentration. MQ3 sensor has high sensitivity to alcohol gas and can resist to interference of gasoline, smoke and vapor and it is designed for low cost and suitable for various applications of detecting alcohol at different concentrations. MQ3 sensor consists of four pins namely a VCC pin , GND pin, Analog pin and a Digital pin. VCC pin is designed for

5V ,it is a voltage required to heat up the sensor coil. GNO pin is always grounded, anc Analog pin and digital pin produces analog and digital outputs. Analog value will be i change in the output voltage level due to subjection of gas. In this application the analog pii of the MQ3 sensor is interfaced with the Analog pin of ESP-12E Wi-Fi model.
DHT11/DHT 22 is a combined Temperature and Humidity sensor, it is digital in nature.DHl 11 and DHT22 are similar type of electronic sensors designed to detect temperature an( humidity conditions. Among both DHT22 has a greatest accuracy and temperature range DHT11/22 Temperature and humidity sensor consists of three pins a VCC ,GND and DAT^ pins.VCC pin is designed for 3.3V for sensor to operate and GND pin is always grounded and a third pin DATA pin is a digital pin which is used to observe the output Temperature and Humidity values. The data pin is interfaced with general digital pin of Wi-Fi model.
Wi-Fi model ESP-12E used in the application is mainly designed for IoT applications, ESP-12E is a 80Mhz microcontroller chip with a full Wi-Fi firontend (both as client and access point) and TCP/IP stack with DNS support as well. The chip consists of 22 pins out ol which 11 pins are meant for general purpose input and output interface and 2 pins are usee for receiving and transmitting data .while compared to other Wi-Fi modules of ESP family it is unique to consists of ADC Analog pin. It also consists of VCC, EN(Enable),GND, RST(reset) ,CSO(chip selection of SP1 interface),MlSO((Master in slave out),MOSI( Mastei out slave in),and SCLK ( clock) pins and a small integrated on chip antenna to support IPEX interfaces. The MQ3 and DHT11/22 sensors Congregation is interfaced with ADC and GPO pin of ESP_12E it is shown in Figure 2.
COMPONENT ASSEMBLY:
Figure 2 shows the schematic representation of the device circuitry which is developed to Monitor fruits and veggie rots. It consists of congregation of MQ3 and DHT11/22 sensors interfaced with ESP-12E Wi-Fi model.
• The IoT based device to detect veggie and fruit rot works with supply voltage of 5 V.
• Analog pin of MQ3 sensor is interfaced with ADC pin of ESP-12E Wi-Fi model. Voltage across the heater pins of MQ3 sensor varies as a result of subjected gas this is obtained at the end of analog pin .this data is sent to ADC pin of ESP-12E Wi-Fi model.

• An a voltage divider circuit consisting of two 1K£2 resistors connected in series i used in between analog pin of MQ3 sensor and ADC pin of ESP-12E Wi-Fi model The maximum voltage on analog pin of MQ3 sensor is found to be 1.8 v. And ADC pin of ESP-12E holds maximum of lv in order to build voltage difference a voltagi divider circuit is used it converts 1.8V to 0.9 volts.
• DHT11/22 Temperature and Humidity sensor DATA pin is interfaced with GPKX (General purpose input output) pin of ESP-12E Wi-Fi model.DHTl 1/22 Temperatun and humidity sensor works with supply voltage of 3.3V
• Reaming pins of ESP-12E Wi-Fi model are unconnected.
• FTDIFT232RL serial to USB writer is used to debug the code in to the ESP 12E Wi Fi model.
OPERATING PRINCIPLE:
For the operation of the Device, three main mechanisms are involved are- (1) collecting data from sensors and (2) pushing data to Required internet or cloud (3) and monitoring results.
Collecting Data from sensors: The various data such as amount of gas released in PPM ,and data of Temperature and Humidity will be sent to ADC and GP02 pin of ESP-12E Wi-Fi model. During debugging of data to a ESP-12E the EN(Enable ) pin will be connected tc 3.3 V which is a operating voltage of ESP_12E and GPO0 pin v/ill be grounded, and once the data is debugged the EN and GPO0 will be made no connection for an second, and the EN(enable)pin is reconnected and GPO0 pin will be made no connection. Pushing data to desired internet or cloud: The Data such as gas released in PPM, Temperature and Humidity received from the system needs to be located somewhere, so thai it could be accessed. Sending the processed data to cloud benefits one with advantages like high accessibility and scalability. The data from could will be accessed directly by the warehouse monitoring center or control board. ESP-12E uses local serial port for pushing data to cloud.
Monitoring results : Data string from internet protocol or cloud will be collected and an application is built to monitor data in the form of real time graph .which will be observed on monitor screen.
OPERATION OF THE DEVICE

1. This invention is regarding 'IoT Based Embedded Rot Monitoring Device' using sensors assembly with micro Wi-Fi model, this device comprising: alcohol sensor; Temperature and Humidity sensor; A micro Wi-Fi model; and A serial to USB writer as power supply ;embedded or assembled on single pcb board.
2. The alcohol sensor, referred in claim (1), is interfaced with analog pin of the micro Wi-Fi model calibrates the amount of gas generated from the fruits and veggies .
3. The alcohol sensor .referred in claim(l), produces analog output.
4. Temperature and Humidity sensor, referred in claim (l),is interfaced with GPO pin of micro Micro Wi-Fi model calibrates the temperature and humidity conditions of storage place.
5. Temperature and Humidity sensor .referred in claira(l) ,is digital in nature.
6. Serial to USB writer , referred in claim (1), is used to program and power the device and it is interfaced with Tx and Rx pin of the micro Wi-Fi model.
7. A micro Wi-Fi Model .referred in claim (1) consists of assembly of sensors ,and serial to USB writer interface.
8. The device, referred in claim (1), consists its four parts embedded on single PCB board with a voltage divider and registers assembly.
9. The device, referred in claim (1), monitors fruits and veggies rot conditions continuously from remote storage using an application of IoT(Internet of Things).