🐛 Fixes memory overflow and removes server health check

.gitignore

@@ -104,3 +104,4 @@ flake.lock
 # Before adding new lines, see the comment at the top.
 
 .env*
+.idea/

admin/main.go

@@ -85,6 +85,7 @@ func makePostReq(url string, body any) ([]byte, error) {
 	}
 
 	req.Header.Set("Authorization", token)
+	req.Header.Set("Content-Type", "application/json")
 	res, err := http.DefaultClient.Do(req)
 	if err != nil {
 		return nil, err
@@ -119,8 +120,8 @@ func main() {
 				Action: test,
 			},
 			{
-				Name:  "get",
-				Usage: "get door state",
+				Name:  "open",
+				Usage: "get door state (opened or closed)",
 				Flags: []cli.Flag{
 					&cli.BoolFlag{
 						Name:  "raw",
@@ -200,7 +201,7 @@ func getOpened(ctx context.Context, cmd *cli.Command) error {
 		return err
 	}
 
-	opened, err := makeGetReq(fmt.Sprintf("%s/read", server))
+	opened, err := makeGetReq(fmt.Sprintf("%s/open", server))
 	if err != nil {
 		return err
 	}
@@ -244,7 +245,7 @@ func getAlert(context.Context, *cli.Command) error {
 		return err
 	}
 
-	alert, err := makeGetReq(fmt.Sprintf("%s/alerts", server))
+	alert, err := makeGetReq(fmt.Sprintf("%s/alert", server))
 	if err != nil {
 		return err
 	}
@@ -305,7 +306,7 @@ func createManageAlert(alert bool) func(context.Context, *cli.Command) error {
 			data.For = secs
 		}
 
-		_, err = makePostReq(fmt.Sprintf("%s/alerts", server), data)
+		_, err = makePostReq(fmt.Sprintf("%s/alert", server), data)
 		if err != nil {
 			return err
 		}

peripheral/.gitignore

@@ -1 +1,3 @@
+__pycache__/
+
 .env.json

peripheral/main.py

@@ -1,3 +1,4 @@
+import gc
 import utime
 import ujson
 import network
@@ -7,7 +8,6 @@ from machine import Pin
 THRESHOLD_DISTANCE = 15  # cm
 SOUND_SPEED = 340 * 100  # m/s * centi = cm/s
 MAX_CONNECTION_RETRIES = 50
-ULTRA_OPENED_THRESHOLD = 3
 
 
 class App:
@@ -18,7 +18,7 @@ class App:
 
     opened: bool = False
     previously_opened: bool = False
-    ultra_opened_counter: int = 0
+    wlan: network.WLAN
 
     led = Pin(15, Pin.OUT)
     trigger = Pin(2, Pin.OUT)
@@ -57,18 +57,18 @@ class App:
 
     def connect(self):
         print("Connecting to Wi-Fi...")
-        wlan = network.WLAN(network.STA_IF)
+        self.wlan = network.WLAN(network.STA_IF)
 
-        wlan.active(False)
+        self.wlan.active(False)
         utime.sleep_ms(250)
-        wlan.active(True)
+        self.wlan.active(True)
         utime.sleep_ms(250)
 
-        wlan.connect(self.ssid, self.password)
+        self.wlan.connect(self.ssid, self.password)
         utime.sleep_ms(100)
 
         retry_count = 0
-        while not wlan.isconnected():
+        while not self.wlan.isconnected():
             if retry_count >= MAX_CONNECTION_RETRIES:
                 print("Max connection retries reached")
                 exit(1)
@@ -82,12 +82,12 @@ class App:
 
             if retry_count % 10 == 0:
                 print("Attempting to restart connection...")
-                wlan.connect(self.ssid, self.password)
+                self.wlan.connect(self.ssid, self.password)
                 for _ in range(10):
                     self.led.toggle()
                     utime.sleep_ms(50)
 
-        print(f"Connected with IP {wlan.ifconfig()[0]}")
+        print(f"Connected with IP {self.wlan.ifconfig()[0]}")
         self.update_server()
 
     def update_server(self):
@@ -101,7 +101,7 @@ class App:
                 headers={"Authorization": self.token, "Content-Type": "application/json"},
                 data=raw
             )
-            print(f"State updated [{r.status_code}]")
+            print(f"State updated [{r.status_code}] {r.content.decode()}")
         except Exception as e:
             print(f"Error occurred: {e}")
 
@@ -122,7 +122,7 @@ class App:
 
         delta_time = received_time - sent_time
         distance = delta_time / 1_000_000 * SOUND_SPEED / 2
-        print(f"Distance: {distance} cm")
+        print(f"Distance: {distance:0<5} cm; mem_free = {gc.mem_free()}")
 
         return distance
 
@@ -133,35 +133,41 @@ class App:
         i = 0
         while True:
             try:
+                if not self.wlan.isconnected():
+                    self.connect()
+
                 distance = self.measure_distance()
                 self.opened = distance >= THRESHOLD_DISTANCE
 
-                if not opened:
+                if not self.opened:
                     self.led.low()
-                    self.ultra_opened_counter = 0
 
+                    # was it just closed?
                     if self.previously_opened:
                         self.update_server()
+                        self.previously_opened = False
                 else:
-                    self.led.high()
-                    self.ultra_opened_counter += 1
-
-                    if self.ultra_opened_counter >= ULTRA_OPENED_THRESHOLD:
+                    # was it just opened? +wait delay
+                    if not self.previously_opened:
+                        self.led.high()
                         self.update_server()
+                        self.previously_opened = True
 
                 if i >= 20:
+                    print("Blinking...")
                     self.led.toggle()
                     utime.sleep_ms(100)
                     self.led.toggle()
                     utime.sleep_ms(400)
+
                     i = 0
+                    gc.collect()
                 else:
                     utime.sleep_ms(500)
 
             except Exception as e:
-                print(f"Fatal exception occurred: {e}")
+                print(f"Fatal error occurred: {e}")
 
-            self.previously_opened = self.opened
             i += 1
 
 if __name__ == "__main__":

server/main.go

@@ -130,7 +130,6 @@ func main() {
 		}
 
 		if data.Opened == opened {
-			mut.Unlock()
 			return c.NoContent(http.StatusOK)
 		}