242 lines
7.6 KiB
Python
242 lines
7.6 KiB
Python
import paho.mqtt.client as mqtt
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import time
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import board
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import busio
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from adafruit_ht16k33 import segments
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from enum import Enum
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__TOPIC_BRIGHTNESS__ = "brightness"
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__TOPIC_SCROLL_INTERVAL__ = "scrollinterval"
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__TOPIC_TEXT_STATIC__ = "textstatic"
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__TOPIC_TEXT_ONCE__ = "textonce"
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__TOPIC_TEXT_SCROLL__ = "textscroll"
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__TOPIC_TEXT_MARQUEE__ = "textmarquee"
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__TOPIC_TEXT_PAN__ = "textpan"
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NUMDIGITS = 8
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class Mode(Enum):
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STATIC = 1 #show text constantly. may cut digits
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ONCE = 3 #show once for some time
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SCROLL = 2 #scroll thorugh once
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PAN = 4 #scroll back and forth
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MARQUEE = 5
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class Controller:
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connected = False
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displayL = None
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displayR = None
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def __init__(self, base_topic, mqtt_host, mqtt_port = 1883):
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self.scroll_interval = 0.25
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self.text = " "
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self.text_last = ""
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self.poscount = 0
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self.last_scrollupdate = 0
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self.mode = Mode.STATIC
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# Create the I2C interface.
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self.i2c = busio.I2C(board.SCL, board.SDA)
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# Create the LED segment class.
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# This creates a 14 segment 4 character display:
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self.displayL = segments.Seg14x4(self.i2c, address=0x70) # find address with "sudo i2cdetect -y 1" . you need to install: sudo apt-get install -y python-smbus i2c-tools
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self.displayR = segments.Seg14x4(self.i2c, address=0x71)
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# Clear the display.
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self.displayL.fill(0)
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self.displayR.fill(0)
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# set brightness, range 0-1.0, 1.0 max brightness
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self.displayL.brightness = 1.0
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self.displayR.brightness = 1.0
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self.mqtt = mqtt.Client()
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self.mqtt.on_connect = self.on_connect
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self.mqtt.on_message = self.on_message
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self.mqtt.on_disconnect = self.on_disconnect
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self.mqtt.connect(mqtt_host, mqtt_port)
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self.topic = base_topic
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self.displayL.print("LEFT")
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self.displayR.print("RIGH")
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def on_disconnect(self, client, userdata, rc):
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print("MQTT disconnected")
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self.connected = False
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def on_message(self, client, userdata, message):
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msg = str(message.payload.decode("utf-8"))
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print("msg = " + msg)
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if message.topic.endswith(__TOPIC_BRIGHTNESS__ + "/set"):
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val = float(msg)
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if val >= 0.0 and val <=1.0:
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self.displayL.brightness = val
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self.displayR.brightness = val
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print("changed brightness to ", self.displayL.brightness)
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self.mqtt.publish(self.topic + "/" + __TOPIC_BRIGHTNESS__, self.displayL.brightness, 1 )
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else:
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print("invalid brightness ", val)
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if message.topic.endswith(__TOPIC_SCROLL_INTERVAL__ + "/set"):
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val = float(msg)
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if val > 0.0:
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self.scroll_interval = val
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print("changed scroll_interval to ", self.scroll_interval)
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self.mqtt.publish(self.topic + "/" + __TOPIC_SCROLL_INTERVAL__, self.scroll_interval, 1 )
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else:
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print("error not >0.0: ", val)
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if message.topic.endswith(__TOPIC_TEXT_STATIC__ + "/set"):
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self.mode = Mode.STATIC
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self.text = msg.ljust(NUMDIGITS)
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print("changed text to ", self.text)
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self.mqtt.publish(self.topic + "/" + __TOPIC_TEXT_STATIC__, self.text, 1 )
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if message.topic.endswith(__TOPIC_TEXT_MARQUEE__ + "/set"):
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self.mode = Mode.MARQUEE
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self.poscount = 0 #start at beginning of new text
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self.text = msg
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for i in range(NUMDIGITS):
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self.text = " "+self.text+" " #add spaces left and right for marquee to enter and leave the full frame
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print("changed text to ", self.text)
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self.mqtt.publish(self.topic + "/" + __TOPIC_TEXT_MARQUEE__, self.text, 1 )
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if message.topic.endswith(__TOPIC_TEXT_PAN__ + "/set"):
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self.mode = Mode.PAN
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self.poscount = 0 #start at beginning of new text
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self.text = msg
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for i in range(int(NUMDIGITS/4)):
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self.text = " "+self.text+" " #add spaces left and right for marquee to enter and leave the full frame
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print("changed text to ", self.text)
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self.mqtt.publish(self.topic + "/" + __TOPIC_TEXT_PAN__, self.text, 1 )
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if message.topic.endswith(__TOPIC_TEXT_SCROLL__ + "/set"):
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self.mode = Mode.SCROLL
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self.poscount = 0 #start at beginning of new text
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self.text = msg
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for i in range(NUMDIGITS):
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self.text = " "+self.text+" " #add spaces left and right for marquee to enter and leave the full frame
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print("changed text to ", self.text)
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self.mqtt.publish(self.topic + "/" + __TOPIC_TEXT_SCROLL__, self.text, 1 )
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def on_connect(self, client, userdata, flags, rc):
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print("Connected to MQTT Broker")
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self.mqtt.subscribe(self.topic + "/#")
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self.connected = True
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def writeSegment(self, _digit, _char, clear=False):
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if _digit>=0 and _digit<4:
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if clear:
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self.displayL[_digit]=' '
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self.displayL[_digit] = _char
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elif _digit<8:
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if clear:
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self.displayR[_digit-4]=' '
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self.displayR[_digit-4] = _char
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def displayTextOffset(self, _text, _offset = 0):
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# This function is needed because library print functions only work for a single display module. This function handles the '.' character with its special cases.
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_text+=" " #append NUMDIGITS spaces at end for when scrolling past end
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_text=_text[_offset:] #move by offset
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i=0 #counter for reading pos
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d=0 #counter for writing segment pos
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while d<NUMDIGITS and i<len(_text):
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if _text[i]=='.' and _text[max(0,i-1)]=='.': #is dot and was before (or is at start)
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self.writeSegment(d,_text[i],True)
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d+=1
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i+=1
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else:
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if _text[i]!='.' : #normal char
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self.writeSegment(d,_text[i])
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i+=1
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if i<len(_text):
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if _text[i]=='.': #dot, but can be appended to last char
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self.writeSegment(d,_text[i])
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i+=1
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d+=1
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def seglen(self, _text): #len function but optimized for 14-segment display
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i=0 #counter for reading pos
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d=0 #counter for writing segment pos
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while i<len(_text):
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if _text[i]=='.' and _text[max(0,i-1)]=='.': #is dot and was before (or is at start)
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d+=1
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i+=1
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else:
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if _text[i]!='.' : #normal char
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i+=1
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if i<len(_text):
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if _text[i]=='.': #dot, but can be appended to last char
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i+=1
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d+=1
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return d
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def loop_forever(self):
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run = True
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while run:
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self.mqtt.loop(0.1) #with block timeout
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if self.displayL is not None and self.displayR is not None: #displays initialized
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if self.mode == Mode.STATIC:
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if self.text != self.text_last: #time to update animation
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self.displayTextOffset(self.text, 0)
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if self.mode == Mode.MARQUEE or self.mode == Mode.SCROLL:
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if time.time() > self.last_scrollupdate+self.scroll_interval or self.text != self.text_last: #time to update animation
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self.displayTextOffset(self.text, self.poscount)
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self.poscount += 1
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if self.mode == Mode.MARQUEE:
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self.poscount %= max(1,int(self.seglen(self.text)-NUMDIGITS+1))
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elif self.mode == Mode.SCROLL:
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if self.poscount >= max(1,int(self.seglen(self.text)-NUMDIGITS+1)): #reached end for scroll once
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self.mode == Mode.STATIC
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self.text=" ".ljust(NUMDIGITS) #empty
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self.last_scrollupdate = time.time()
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if self.mode == Mode.PAN:
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if time.time() > self.last_scrollupdate+self.scroll_interval or self.text != self.text_last: #time to update animation
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print("pos=", self.poscount)
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scrolloffset = self.poscount
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if scrolloffset >= (self.seglen(self.text)-NUMDIGITS):
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scrolloffset = (self.seglen(self.text)-NUMDIGITS) - (scrolloffset-(self.seglen(self.text)-NUMDIGITS)) #reverse
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scrolloffset = max(0,scrolloffset) #cap at zero
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print("scrolloffset=", scrolloffset)
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self.displayTextOffset(self.text, scrolloffset)
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self.poscount += 1
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self.poscount %= (self.seglen(self.text)-NUMDIGITS)*2 #if poscount over scrollable width means scroll backwards
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self.last_scrollupdate = time.time()
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self.text_last = self.text
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