Machine-to-Machine-M2M-Communication-Using-ESP8266

Machine to Machine(M2M) Communication is an essential component in many Industrial IoT (IIoT) systems to communicate data in a short-range. Wi-Fi communication (HTTP) between two ESP8266 NodeMCU boards can exchange data without connecting to the internet (you don’t need a router). One ESP8266 as an Access Point (Server) and another ESP8266 as a Station (Client). Then, the server and the client will exchange data (sensor readings) via HTTP requests.

Requirements

• A temperature sensor connected to the one NodeMCU board (Client) will measure the real-time temperature in the environment.
• If the temperature exceeds a threshold value(you can decide the threshold value), it should communicate to the other NodeMCU board (server).
• Once the notification is received from the client node, the actuator (using a relay or a LED)connected to the node should turn on. Once the temperature value is below the threshold value, the actuator should turn off.
• Apply a power-saving technique to the system.
• Analysis of the range(distance) you can provide communication between two nodes.

Hardware Used

• 2 x NodeMCU ESP-12E ESP8266 CP2102
• DHT11 (Temperature and Humidity Sensor)
• 5V DC Relay 5 Pin
• 2 x 9V Battery (Carbon-Zinc)
• Multimeter (To measure the current consumption)
• Breadboard
• Jumper Wires

Software and Tools Used

• Arduino IDE
• ESP8266 CP2102 Driver
• DHT.h (Open your Arduino IDE and go to Sketch > Include Library > Manage Libraries > Search for DHT and install the DHT sensor library from Adafruit).
• Adafruit Sensor Library (go to Sketch > Include Library > Manage Libraries > Search for Adafruit Unified Sensor and install it).
• ESP8266 (In your Arduino IDE, go to File> Preferences, Enter http://arduino.esp8266.com/stable/package_esp8266com_index.json into the "Additional Boards Manager URLs" and click "OK", then Open the Boards Manager. Go to Tools > Board > Boards Manager and Search for ESP8266 and press install button for the "ESP8266 by ESP8266 Community".
• draw.io - Design system overview
• MATLAB R2016a - Plot Distance vs RSSI values and find Curve Fit
• Fritzing - Circuit Design