BenCommunication-Micropython-client

A python library that runs on the micropython side to communicate with BenCommunication Server.

The BenCommunication project uses UDP protocol to communicate with the server, it can assure a secure communication between Micropython and Python scripts over the network. BenCommunication use AES CBC algorithm to encrypt the traffic with a key file that must be kept in a secure place.

The library will:

• Generate a random iv for each request and send it along with the payload.
• Generate a unique ID for each request.

Installation

Download benclient.py and save it on the micropython main directory.

Object arguments

benclient.client() can have the following arguments:

1. host (str) => The ip of the server.
2. port (int) => The port used by server.
3. timeout (int) => (default=10) How much time to wait for response from server.
4. keyfile (str) => (default=key.sec) the keyfile, it contains 32 random bytes. You can generate a key with the server module.
5. buffersize (int) => (default=4096) The buffer for Udp Socket.

benclient.client().send() can have the following arguments:

1. data (dict) : payload to be sent must be in following format { "action" : "someaction" ,"data" : ... }
2. noreturn (bool): (default=false) if set to True, it will wait for the return of the called action.

Example to send data from sensor every 1 minute

Client side

import dht 
from machine import Pin
from time import sleep
from  benclient  import  client # Import the 
obj  =  client("192.168.1.2",8585) # Server ip and port

sensor = dht.DHT11(Pin(14)) #GPIO 14
while True:
	sensor.measure() 
	temperature = sensor.temperature() 
	humidity = sensor.humidity()
	obj.send({"action":"dhtsensor","data":{
		"temperature":temperature , 
		"humidity":humidity 
		}}, noreturn=True) # We set noreturn to true, this will make library continue without waiting for response.
	sleep(60)

Server Side see BenCommunication-Micropython-Server:

from  benserver  import  server
def  dht(data):
	temperature  =  data["temperature"]
	humidity  =  data["humidity"]
	print(f"Temperature: {temperature}")
	print(f"humidity: {humidity}")

server1  =  server("0.0.0.0",8585)
server1.add_action_handler("dhtsensor",dht)
server1.start()

We get output:

Temperature: 30

humidity: 50

Last tested with MicroPython v1.19.1 on 2022-06-18; ESP module with ESP8266.

If you have any suggestions, feel free to fork and send a pull request. Thanks for reading :D