interfisch
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mqtt_pi_led-display
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working code with python 3

This commit is contained in:
interfisch 2021-07-01 21:06:18 +01:00
parent 82652008d7
commit e09b57aab5
1 changed files with 9 additions and 4 deletions
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13
src/controller.py
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@ -12,11 +12,12 @@ __TOPIC_TEXT__ = "text"
class Controller: class Controller:
connected = False connected = False
display = None display = None
last_scrollupdate = 0
def __init__(self, base_topic, mqtt_host, mqtt_port = 1883): def __init__(self, base_topic, mqtt_host, mqtt_port = 1883):
self.scroll_interval = 0.25 self.scroll_interval = 0.25
self.text = "" self.text = " "
self.poscount = 0 self.poscount = 0
# Create the I2C interface. # Create the I2C interface.
@ -70,7 +71,10 @@ class Controller:
if message.topic.endswith(__TOPIC_TEXT__ + "/set"): if message.topic.endswith(__TOPIC_TEXT__ + "/set"):
self.poscount = 0 #start at beginning of new text
self.text = msg self.text = msg
if len(self.text)==0:
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__, self.text, 1 )
@ -85,11 +89,12 @@ class Controller:
run = True run = True
while run: while run:
self.mqtt.loop() self.mqtt.loop(0.1) #with block timeout
if self.display is not None: if self.display is not None and time.time() > self.last_scrollupdate+self.scroll_interval:
self.display.print(self.text[self.poscount]) self.display.print(self.text[self.poscount])
self.poscount += 1 self.poscount += 1
self.poscount %= len(self.text) self.poscount %= len(self.text)
time.sleep(self.scroll_interval) self.last_scrollupdate = time.time()