#IOT:1

My custom protocol for communication between devices at home. It uses UPD and broadcast. Messages are json strings.

## Message body:

{
    "protocol": "iot:1",
    "node": "Rpi-lcd-1",
    "chip_id": "RpiB",
    "event": "lcd.content",
    "parameters: [
        "content": "-(=^.^)"
    ],
    "response": '',
    "targets": [
        "nodemcu-lcd-40x4"
    ]
}

• protocol: defines name, currently iot:1
• node: friendly node name like light-room-big or screen-one-kitchen
• chip_id: a unique device id
• event: event name like light.on or display
• parameters: array of parameters. like rows to display
• response: used when responding to request, ie returning toilet state
• targets: message targets node with this names. special keyword ALL for all nodes in network

## set node name or/and chip_id

Message.chip_id = 'miau'
Message.node_name = 'miau_too'

### Message()

Create new instance. It is automatically filled with chip_id and node_name if not set

### Message(string_message)

Creates message and fills with received data

input = """{"protocol": "iot:1", "node": "node_name", "chip_id": "aaa", "event": "channel.on", "parameters": {"channel": 0}, "response": "", "targets": ["node-north"]}"""
msg = factory.MessageFactory.create(input)

## functions

### set(dictionary)

msg = message.Message()
msg.set({
    'event': 'event.test',
    'parameters': {
        'is_x': '1'
    }
})

Fills message with params.

### send message

s.sendto(bytes(msg), address)

### get value

msg = message.Message()
msg.set({
    'event': 'event.test',
    'parameters': {
        'is_x': '1'
    }
})

print(msg['event'])

### AES encryptor

Uses AES-CBC with hmac signing. require: pip install pycryptodome

Cryptor takes four parameters:

def __init__(self, staticiv, ivkey, datakey, passphrase):
    self.staticiv = staticiv
    self.ivkey = ivkey
    self.datakey = datakey
    self.passphrase = passphrase

Usage:

from iot_message.cryptor.aes_sha1 import Cryptor as AES

Message.add_decoder(AES(
    'abcdef2345678901', '2345678901abcdef', '0123456789abcdef', 'mypassphrase'
))