pir_hcssr501.md

PIR HCS SR 501

Module and handler for motion detector. Broadcasts two events: pir.movement and pir.nomovement. Response to event pir.move

Sample message:

{
    "chip_id":1084612,
    "protocol":"iot:1",
    "node":"node-kitchen",
    "targets":["ALL"],
    "event":"pir.movement",
    "response":""
}

Read current state:

{
    'protocol': 'iot:1',
    'node': 'computer',
    'chip_id': 'd45656b45afb58b1f0a46',
    'event': 'pir.move',
    'targets': [
        'ALL'
    ]
}

Response:

{
    "chip_id":1084612,
    "protocol":"iot:1",
    "node":"node-kitchen",
    "targets":["ALL"],
    "event":"",
    "response":false
}

Sample code

In ths example sensor is wired to pin G3

network_message = require "network_message"
server_listener = require "server_listener"

pir = require "pir_hcs_sr501"
pir_handler = require "pir_hcs_sr501_handler"

send_socket = net.createUDPSocket() 

sensor = pir(send_socket, 2) -- 2 is a pin no
handler = pir_handler(sensor)

-- add handlers to listener
server_listener.add("pir", handler)

-- run server
server_listener.start(PORT)

Can pass callback as last parameter to worker and handler:

cb = function(event)
    print("event :"..event)
end
 
sensor = pir(send_socket, 2, cb)
handler = pir_handler(sensor, cb)        

If send_socket is nil there is no broadcast. In this case only callback is executed:

sensor = pir(nil, 2, cb)