feat: configure ui labels via mqtt message

flow3r_openhab/__init__.py

@@ -1,6 +1,7 @@
 
 import gc
 import json
+import math
 import network
 import os
 import socket
@@ -22,14 +23,25 @@ class Flow3rOpenhabMqtt(Application):
         self.state = 0
         self.nic = network.WLAN(network.STA_IF)
         client_id = CONFIG['mqtt_client_id'].format(self.nic.config('mac').hex())
-        self.base_topic = CONFIG['mqtt_topic'].format(self.nic.config('mac').hex())
+        self.base_topic = CONFIG['mqtt_topic_base'].format(self.nic.config('mac').hex()).encode()
         self.mqtt = MQTTClient(client_id, CONFIG['mqtt_broker_ip'])
+        self.mqtt.set_callback(self.mqtt_cb)
         self.touch_time = [None]*10
         self.touch_begin = [None]*10
         self.touch_last = [None]*10
         self.touch_base = [False]*10
         self.touch_tip = [False]*10
         self.touch_log = [[]]*10
+        self.ui_config = [""]*10
+
+    def mqtt_cb(self, topic, msg):
+        print(topic, msg)
+        if topic == self.base_topic + b'ui_config':
+            try:
+                print(msg)
+                self.ui_config = json.loads(msg.decode())
+            except Exception as e:
+                print(e)
 
     def draw(self, ctx: Context) -> None:
         if self.state == 0:
@@ -39,6 +51,15 @@ class Flow3rOpenhabMqtt(Application):
         ctx.rgb(0, 0, 0).rectangle(-120, -120, 240, 240).fill()
         ctx.rgb(0.3, 0.3, 0.3).arc(0, 0, 90, 0, 2.39, 0).arc(0, 0, 90, 2.79, 6.29, 0).stroke()
         ctx.rgb(0.9, 0.3, 0.1).move_to(-96, 53).line_to(-1, -43).line_to(71, 29).stroke()
+        ctx.text_align = ctx.CENTER
+        ctx.text_baseline = ctx.MIDDLE
+        ctx.font_size = 20
+        for i, text in enumerate(self.ui_config):
+            phi = (2*math.pi/10)*(i+1)-(math.pi/2)
+            radius = 50 if i%2 else 80
+            x = radius*math.cos(phi)
+            y = radius*math.sin(phi)
+            ctx.rgb(1, 1, 1).move_to(x, y).text(text)
         if CONFIG.get('debug_touch', False):
             ctx.line_width =1
             for i in range(10):
@@ -62,9 +83,13 @@ class Flow3rOpenhabMqtt(Application):
             self.do_connect()
         if self.nic.status() == network.STAT_GOT_IP and self.state == 0:
             gc.collect()
+            self.mqtt.set_last_will(self.base_topic + 'status', 'Offline', retain=True)
             self.mqtt.connect()
+            self.mqtt.subscribe(self.base_topic + 'ui_config')
+            self.mqtt.publish(self.base_topic + 'status', 'Online', retain=True)
             self.state = 1
         if self.state == 1:
+            self.mqtt.check_msg()
             for i in range(10):
                 if ins.captouch.petals[i].pressed:
                     # Ignore the first few ms of touch events, as position data appears to be unrealiable at first
@@ -104,7 +129,9 @@ class Flow3rOpenhabMqtt(Application):
                                 event = 'swipe_left'
                         if event is not None:
                             human_petal = 10-(-i%10)
-                            self.mqtt.publish(self.base_topic, b'{{"petal":"{}","event":"{}","dx":{},"dy":{},"duration":{}}}'.format(human_petal, event, d_x, d_y, duration))
+                            msg = b'{{"petal":"{}","event":"{}","dx":{},"dy":{},"duration":{}}}'\
+                                .format(human_petal, event, d_x, d_y, duration)
+                            self.mqtt.publish(self.base_topic + 'event', msg)
                         self.touch_time[i] = None
                         self.touch_begin[i] = None
                         self.touch_last[i] = None

flow3r_openhab/config.example.json

@@ -3,5 +3,5 @@
     "wifi_psk": "supersecurepassword",
     "mqtt_broker_ip": "127.0.0.1",
     "mqtt_client_id": "flow3r-{}",
-    "mqtt_topic": "flow3r-{}/event"
+    "mqtt_topic_base": "flow3r-{}/"
 }