display and espmega driver

access_control_python/access_control_mqtt.py

@@ -1,9 +1,11 @@
 import paho.mqtt.client as mqtt
+import espmega_mqtt.ESPMegaMQTT as ESPMegaMQTT
 
-BASE_TOPIC = "/facescan"
+plc = ESPMegaMQTT()
 
 class access_control:
     def __init__(self, serial_port: str):
+        
         pass
 
     def light_on(self):

access_control_python/display.py

@@ -1,3 +1,15 @@
+import serial
 class Display:
-    def __init__(self) -> None:
-        pass
+    def __init__(self, serial_port: str) -> None:
+        self.serial_adapter = serial.Serial(serial_port,baudrate=115200)
+    def set_page(self, page):
+        command = f'page {page}'.encode("ascii")
+        self.serial_adapter.write(command)
+        self.send_stop_bit()
+    def set_string(self, field, text):
+        command = f'{field}="{text}"'.encode("ascii")
+        self.serial_adapter.write(command)
+    def send_stop_bit(self):
+        self.serial_adapter.write(0xFF)
+        self.serial_adapter.write(0xFF)
+        self.serial_adapter.write(0xFF)

access_control_python/espmega_mqtt.py

@@ -1,7 +1,25 @@
-class espmega_mqtt:
+import paho.mqtt.client as pahomqtt
+BROKER = "192.168.0.26"
+BASE_TOPIC = "/facescan"
+class ESPMegaMQTT:
+    input_buffer = [0]*16
+    mqtt: pahomqtt.Client
     def __init__(self) -> None:
-        pass
-    def write_pwm():
-        pass
-    def read_digital():
-        pass
+        self.mqtt = pahomqtt.Client(client_id="pyfacescan")
+        self.mqtt.connect(host=BROKER,port=1883,keepalive=60)
+        self.mqtt.subscribe(f'{BASE_TOPIC}/input/#')
+        self.mqtt.on_message=self.handle_message
+        self.request_state()
+        self.mqtt.loop_start()
+    def write_pwm(self, id: int, state: bool, value: int = 4095):
+        self.mqtt.publish(f'{BASE_TOPIC}/pwm/{"%02d"}/set/state'%id,"on" if state else "off")
+        self.mqtt.publish(f'{BASE_TOPIC}/pwm/{"%02d"}/set/value'%id, str(value))
+    def read_digital(self, id: int):
+        return self.input_buffer[id]
+    def request_state(self):
+        self.mqtt.publish(f'{BASE_TOPIC}/requeststate',"req")
+    def handle_message(self, client: pahomqtt.Client, data, message: pahomqtt.MQTTMessage):
+        if (message.topic.startswith(BASE_TOPIC+"/input/")):
+            id = int(message.topic[len(BASE_TOPIC)+7:len(message.topic)])
+            state = int(message.payload)
+            self.input_buffer[id] = state

access_control_python/main.py

@@ -4,6 +4,7 @@ import time
 import face_processing as fp
 from access_control import access_control
 from database import database, Student, Parent
+from displ
 
 SERIAL_PORT_STM32 = "COM12"
 SERIAL_PORT_DISPLAY = "COM15"
@@ -11,6 +12,7 @@ CAMERA_INDEX = 0
 
 cam = cv2.VideoCapture(CAMERA_INDEX)
 stm32 = access_control(SERIAL_PORT_STM32)
+display = 
 
 global img
 global frame_ready