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mqtt_pi_led-display
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scroll text animations

This commit is contained in:
interfisch 2021-07-03 21:14:56 +02:00
parent 6ceb400b48
commit f7d33efd31
1 changed files with 97 additions and 17 deletions
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108
src/controller.py
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@ -4,15 +4,31 @@ import time
import board import board
import busio import busio
from adafruit_ht16k33 import segments from adafruit_ht16k33 import segments
from enum import Enum
__TOPIC_BRIGHTNESS__ = "brightness" __TOPIC_BRIGHTNESS__ = "brightness"
__TOPIC_SCROLL_INTERVAL__ = "scroll_interval" __TOPIC_SCROLL_INTERVAL__ = "scrollinterval"
__TOPIC_TEXT__ = "text" __TOPIC_TEXT_STATIC__ = "textstatic"
__TOPIC_TEXT_ONCE__ = "textonce"
__TOPIC_TEXT_SCROLL__ = "textscroll"
__TOPIC_TEXT_SCROLL_REPEAT__ = "textscrollrepeat"
__TOPIC_TEXT_SCROLL_LR__ = "textscrolllr"
NUMDIGITS = 8
class Mode(Enum):
STATIC = 1 #show text constantly. may cut digits
ONCE = 3 #show once for some time
SCROLL = 2 #scroll thorugh once
SCROLL_LR = 4 #scroll back and forth
SCROLL_REPEAT = 5
class Controller: class Controller:
connected = False connected = False
display = None displayL = None
displayR = None
last_scrollupdate = 0 last_scrollupdate = 0
mode = Mode.STATIC
def __init__(self, base_topic, mqtt_host, mqtt_port = 1883): def __init__(self, base_topic, mqtt_host, mqtt_port = 1883):
@ -25,13 +41,16 @@ class Controller:
# Create the LED segment class. # Create the LED segment class.
# This creates a 14 segment 4 character display: # This creates a 14 segment 4 character display:
self.display = 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 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
self.displayR = segments.Seg14x4(self.i2c, address=0x71)
# Clear the display. # Clear the display.
self.display.fill(0) self.displayL.fill(0)
self.displayR.fill(0)
# set brightness, range 0-1.0, 1.0 max brightness # set brightness, range 0-1.0, 1.0 max brightness
self.display.brightness = 1.0 self.displayL.brightness = 1.0
self.displayR.brightness = 1.0
self.mqtt = mqtt.Client() self.mqtt = mqtt.Client()
self.mqtt.on_connect = self.on_connect self.mqtt.on_connect = self.on_connect
@ -40,7 +59,8 @@ class Controller:
self.mqtt.connect(mqtt_host, mqtt_port) self.mqtt.connect(mqtt_host, mqtt_port)
self.topic = base_topic self.topic = base_topic
self.display.print("BOOT") self.displayL.print("LEFT")
self.displayR.print("RIGH")
def on_disconnect(self, client, userdata, rc): def on_disconnect(self, client, userdata, rc):
@ -54,9 +74,10 @@ class Controller:
if message.topic.endswith(__TOPIC_BRIGHTNESS__ + "/set"): if message.topic.endswith(__TOPIC_BRIGHTNESS__ + "/set"):
val = float(msg) val = float(msg)
if val >= 0.0 and val <=1.0: if val >= 0.0 and val <=1.0:
self.display.brightness = val self.displayL.brightness = val
print("changed brightness to ", self.display.brightness) self.displayR.brightness = val
self.mqtt.publish(self.topic + "/" + __TOPIC_BRIGHTNESS__, self.display.brightness, 1 ) print("changed brightness to ", self.displayL.brightness)
self.mqtt.publish(self.topic + "/" + __TOPIC_BRIGHTNESS__, self.displayL.brightness, 1 )
else: else:
print("invalid brightness ", val) print("invalid brightness ", val)
@ -70,13 +91,23 @@ class Controller:
print("error not >0.0: ", val) print("error not >0.0: ", val)
if message.topic.endswith(__TOPIC_TEXT__ + "/set"): if message.topic.endswith(__TOPIC_TEXT_SCROLL_REPEAT__ + "/set"):
self.mode = Mode.SCROLL_REPEAT
self.poscount = 0 #start at beginning of new text self.poscount = 0 #start at beginning of new text
self.text = msg self.text = msg
if len(self.text)==0: if len(self.text)==0:
self.text=" " self.text=" "
print("changed text to ", self.text) print("changed text to ", self.text)
self.mqtt.publish(self.topic + "/" + __TOPIC_TEXT__, self.text, 1 ) self.mqtt.publish(self.topic + "/" + __TOPIC_TEXT_SCROLL_REPEAT__, self.text, 1 )
if message.topic.endswith(__TOPIC_TEXT_SCROLL_LR__ + "/set"):
self.mode = Mode.SCROLL_LR
self.poscount = 0 #start at beginning of new text
self.text = msg
if len(self.text)==0:
self.text=" "
print("changed text to ", self.text)
self.mqtt.publish(self.topic + "/" + __TOPIC_TEXT_SCROLL_LR__, self.text, 1 )
def on_connect(self, client, userdata, flags, rc): def on_connect(self, client, userdata, flags, rc):
@ -84,6 +115,36 @@ class Controller:
self.mqtt.subscribe(self.topic + "/#") self.mqtt.subscribe(self.topic + "/#")
self.connected = True self.connected = True
def displayTextOffset(self, _text, _offset = 0, _wrap=True):
while len(_text)<NUMDIGITS:
_text+=" "
if _wrap:
self.displayL[0] = _text[((_offset+0)%len(_text))]
self.displayL[1] = _text[((_offset+1)%len(_text))]
self.displayL[2] = _text[((_offset+2)%len(_text))]
self.displayL[3] = _text[((_offset+3)%len(_text))]
self.displayR[0] = _text[((_offset+4)%len(_text))]
self.displayR[1] = _text[((_offset+5)%len(_text))]
self.displayR[2] = _text[((_offset+6)%len(_text))]
self.displayR[3] = _text[((_offset+7)%len(_text))]
else:
if _offset+0>=0 and _offset+0<len(_text):
self.displayL[0] = _text[((_offset+0))]
if _offset+1>=0 and _offset+1<len(_text):
self.displayL[1] = _text[((_offset+1))]
if _offset+2>=0 and _offset+2<len(_text):
self.displayL[2] = _text[((_offset+2))]
if _offset+3>=0 and _offset+3<len(_text):
self.displayL[3] = _text[((_offset+3))]
if _offset+4>=0 and _offset+4<len(_text):
self.displayR[0] = _text[((_offset+4))]
if _offset+5>=0 and _offset+5<len(_text):
self.displayR[1] = _text[((_offset+5))]
if _offset+6>=0 and _offset+6<len(_text):
self.displayR[2] = _text[((_offset+6))]
if _offset+7>=0 and _offset+7<len(_text):
self.displayR[3] = _text[((_offset+7))]
def loop_forever(self): def loop_forever(self):
run = True run = True
@ -91,10 +152,29 @@ class Controller:
while run: while run:
self.mqtt.loop(0.1) #with block timeout self.mqtt.loop(0.1) #with block timeout
if self.display is not None and time.time() > self.last_scrollupdate+self.scroll_interval: if self.displayL is not None and self.displayR is not None: #displays initialized
self.display.print(self.text[self.poscount]) if self.mode == Mode.SCROLL_REPEAT:
if time.time() > self.last_scrollupdate+self.scroll_interval: #time to update animation
self.displayTextOffset(self.text, self.poscount, True)
self.poscount += 1 self.poscount += 1
self.poscount %= len(self.text) self.poscount %= len(self.text)
self.last_scrollupdate = time.time() self.last_scrollupdate = time.time()
if self.mode == Mode.SCROLL_LR:
if time.time() > self.last_scrollupdate+self.scroll_interval: #time to update animation
print("pos=", self.poscount)
scrolloffset = self.poscount
if scrolloffset >= (len(self.text)-NUMDIGITS):
scrolloffset = (len(self.text)-NUMDIGITS) - (scrolloffset-(len(self.text)-NUMDIGITS)) #reverse
scrolloffset = max(0,scrolloffset) #cap at zero
print("scrolloffset=", scrolloffset)
self.displayTextOffset(self.text, scrolloffset, False)
self.poscount += 1
self.poscount %= (len(self.text)-NUMDIGITS)*2 #if poscount over scrollable width means scroll backwards
self.last_scrollupdate = time.time()