342 lines
7.5 KiB
Python
342 lines
7.5 KiB
Python
#!/usr/bin/env python
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# WS server example that synchronizes state across clients
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import asyncio
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import json
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import logging
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import websockets
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import redis
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import time
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import serial
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import numpy as np
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import RPi.GPIO as GPIO
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import threading
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import os
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def is_raspberrypi():
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try:
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with io.open('/sys/firmware/devicetree/base/model', 'r') as m:
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if 'raspberry pi' in m.read().lower(): return True
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except Exception: pass
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return False
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print(is_raspberrypi)
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# Colordefinition for console print
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class pcol:
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HEADER = '\033[95m'
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OKBLUE = '\033[94m'
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OKGREEN = '\033[92m'
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WARNING = '\033[93m'
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FAIL = '\033[91m'
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ENDC = '\033[0m'
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BOLD = '\033[1m'
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UNDERLINE = '\033[4m'
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#################################################################################
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#
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#
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# G L O B A L S
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#
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# DMX array config
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DMXDATA = np.zeros([513], dtype='uint8')
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# DMX Startcode
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DMXDATA[0] = 0 # 0 = Lighting Control Data
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# DMX Reset [µs]/float
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DMXRST = 1000000.0 # typical 88µs
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# DMX Break [µs]/float
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DMXBRK = 8.0 # 8µs (min) to 1s (max)
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# DMX Sequence sleep [ms]/float
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DMXSLP = 5000.0 #250.0 # 0µs (min) to 1s (max)
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# Buffer for RDM
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DMXRDM = 0
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DMXRDMFLAG = False # 1 for radlines() is active to buffer rdm packages
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#
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# Websocket variables
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#
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# Set to store user-data
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USERS = set()
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# Set to store other data served by the websocket
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# STATE = {}
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# DummyFill
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# for i in range(1, 10):
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# STATE.update({str(i): 0})
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#################################################################################
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#
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#
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# F U N C T I O N S
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#
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#
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###########################
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#
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# DMX
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#
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###########################
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def sendDMX(data):
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#continuously sending the signal; to receive changed values: Threading
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global DMXRDMFLAG
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global DMXRDM
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while True:
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with serial.Serial('/dev/serial0', baudrate=250000, timeout=1, stopbits=serial.STOPBITS_TWO, bytesize=8) as DMXSER:# UART configuration and definition
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DMXSER.cancel_read()
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# GPIO_18 to switch RS-485 driver (IC1) to TX-mode
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GPIO.output(18, GPIO.HIGH)
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# send reset
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DMXSER.send_break(DMXRST / 1000000.0)
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# break-time
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time.sleep(DMXBRK / 1000000.0)
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# send complete data array
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DMXSER.write(bytearray(DMXDATA))
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# GPIO_18 to switch RS-485 driver (IC1) to RX-mode
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DMXSER.reset_input_buffer()
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GPIO.output(18, GPIO.LOW)
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# Sleep between TX packages, use time to get RDM packages
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DMXRDM = ""
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DMXRDMFLAG = False
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DMXSER.timeout(DMXSLP / 1000.0) # between 0 - 1 sec
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DMXRDM = DMXSER.readlines()
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DMXRDMFLAG = True
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###########################
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#
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# THREADING
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#
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###########################
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slicy = threading.Thread(target=sendDMX, args=(DMXDATA, ))
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slicy.start()
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###########################
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#
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# Websockset
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#
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###########################
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async def rdm_state():
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global DMXRDM
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global DMXRDMFLAG
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if USERS and DMXRDMFLAG:
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message = "rdm=" + DMXRDM + ";"
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print("RDM EVENT " + DMXRDM)
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await asyncio.wait([user.send(message) for user in USERS])
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# Notify_State is triggered each time a new connection is established to the websocket
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# and only sent to the new user, not to all!
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# Serving all infos once as complete string, so we only have to send delta from that time on
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async def notify_state():
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if USERS: # asyncio.wait doesnt accept an empty list
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message = state_event()
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await asyncio.wait([user.send(message) for user in USERS])
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# Generate message-text for Notify_State
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def state_event():
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# we have to send a string
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rtn = ""
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# dont have to send DMXDATA[0], this is the start code
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for index in range(1, len(DMXDATA)):
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rtn += (str(index) + "=" + str(DMXDATA[index]) + ";")
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# give debug feedback
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print("state_event returned ", rtn)
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return rtn
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# Users-Event is triggered each time a new connection is established to the websocket
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# and sent to all other but not the new user
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async def notify_users():
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if USERS: # asyncio.wait doesnt accept an empty list
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message = users_event()
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await asyncio.wait([user.send(message) for user in USERS])
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# Generate message-text for Notify_Users
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def users_event():
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# only send the new value
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return "users=" + str(len(USERS)) + ";"
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# Handling (un-)registering
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async def register(websocket):
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USERS.add(websocket)
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print("New user registered ")
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await notify_users()
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async def unregister(websocket):
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USERS.remove(websocket)
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print("Known user left")
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await notify_users()
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#
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# Sending delta-reports to all users when a value changed except user count
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#
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async def notify_delta(delta):
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if USERS: # asyncio.wait doesnt accept an empty list
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await asyncio.wait([user.send(delta) for user in USERS])
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#
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# Websocket working thread
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#
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async def websworker(websocket, path):
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# register(websocket) sends user_event() to websocket
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await register(websocket)
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try:
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await websocket.send(state_event())
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while True:
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try:
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# waiting for a new message received on the websocket
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message = await asyncio.wait_for(websocket.recv(), timeout=0.1)
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# split message from multiple commands in one string
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data = message.split(";")
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# process each command
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for index in range(len(data)):
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# act[0] will be the key
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# act[1] will be the value
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act = data[index].split("=")
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try:
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# if key is a number, we will have e change on a dmx value
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# otherwise, we have a string to check which will be processed in except...
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# poor python - there is no other chance to check if a string can be a int without errors
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dmxchannel = int(act[0])
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dmxvalue = int(act[1])
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# We have integer, but are they in a valid range?
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if( dmxchannel < 1 or dmxchannel > 512 or dmxvalue < 0 or dmxvalue > 255):
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# this must be an exception, we will continue in the exception-area anyway now
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dmxchannel = int("will raise")
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# looks valid, so take them to the buffer
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DMXDATA[dmxchannel] = dmxvalue
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# notifying our connected users
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# we can send the resceived command back since the syntax is matched :)
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await notify_delta(data[index])
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# debug
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print("DMX value for channel " + act[0] + " changed to " + act[1])
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# It does not look like we have a dmx key-value, so we have to process the command
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except Exception:
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if act[0] == "manual":
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sendDMX(DMXDATA)
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print("Manual send data: ", bytearray(DMXDATA))
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elif act[0] == "sec":
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print("")
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else:
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print("received message, but can not handle: ", act)
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except asyncio.TimeoutError:
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await rdm_state()
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finally:
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await unregister(websocket)
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###########################
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#
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# GPIO
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#
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###########################
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# We have to set GPIO
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GPIO.setmode(GPIO.BCM)
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GPIO.setwarnings(False)
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GPIO.setup(18, GPIO.OUT)
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GPIO.setup(4, GPIO.OUT)
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# GPIO_18 to switch RS-485 driver (IC1) to RX-mode
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#GPIO.output(18, GPIO.LOW)
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# V2: will be done in send-loop for rdm
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# Powercycle 3V3 on HAT to ensure a cleaned up buffer
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GPIO.output(4, GPIO.HIGH)
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time.sleep(0.25)
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GPIO.output(4, GPIO.LOW)
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###########################
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#
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# Start the websocket
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#
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###########################
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asyncio.get_event_loop().run_until_complete(
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websockets.serve(websworker, port=6789))
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asyncio.get_event_loop().run_forever()
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