Error handling

fb_gui.py

@@ -62,7 +62,7 @@ time_str = time.strftime(CLOCK_FORMAT, now_parts)
 temp_str = TEMP_FORMAT % -10.0
 
 clock_box=TextBox( (10,10), (300,120), JITTER, (255,255,255), BKGND_COLOR, time_str)
-temp_box =TextBox( (120,180), (190,50), JITTER, (255,0,0), BKGND_COLOR, temp_str)
+temp_box =TextBox( (100,160), (200,60), JITTER, (255,0,0), BKGND_COLOR, temp_str)
 
 display = Framebuffer(1)
 fb_img = Image.new(mode="RGB", size=DISPLAY_SIZE)
@@ -71,14 +71,27 @@ fb_draw = ImageDraw.Draw(fb_img)
 mean_temp = 0
 
 def fetch_temp(bridge, user, sensor):
-    r=requests.get(f"http://{bridge}/api/{user}/sensors/{str(sensor)}")
+    try:
+        r=requests.get(f"http://{bridge}/api/{user}/sensors/{str(sensor)}")
+    except requests.exceptions.ConnectionError:
+        r=None
     if r:
-        return r.json()["state"]["temperature"]/100
+        json = r.json()
+        if 'state' in json and 'temperature' in json['state'] and json['state']['temperature']:
+            return json["state"]["temperature"]/100
     return None
 
 def jitter():
     return (random.randint(0,JITTER), random.randint(0,JITTER))
 
+def set_brightness(now_parts):
+    if now_parts.tm_hour > 7 and now_parts.tm_hour < 19:
+        subprocess.run(GPIO_TOOL+DAY_BRIGHT)
+    else:
+        subprocess.run(GPIO_TOOL+NIGHT_BRIGHT)
+
+
+
 # Main loop:
 jitter_pos = jitter()
 
@@ -86,7 +99,8 @@ old_time=""
 old_temp=""
 
 subprocess.run(GPIO_TOOL+PWM_MODE)
-subprocess.run(GPIO_TOOL+NIGHT_BRIGHT)
+
+set_brightness(now_parts)
 
 fb_draw.rectangle(((0,0),DISPLAY_SIZE),BKGND_COLOR, BKGND_COLOR,1)
 temp_time=time.time()
@@ -96,23 +110,21 @@ try:
 
         now = time.time()
         now_parts = time.localtime(now)
+        time_str = time.strftime(CLOCK_FORMAT, now_parts)
 
         if now-temp_time > TEMP_DELAY:
             cur_temp = fetch_temp("philips-hue", "GQ03rw1saUS0n88G5yj9j7-TsteFIE1yxtlBOgzD", 71)
             if cur_temp:
                 mean_temp = cur_temp
                 temp_time = now
+                temp_str = TEMP_FORMAT % mean_temp
+            else:
+                temp_str = "---"
 
         if now_parts.tm_sec == 0:
             jitter_pos = jitter()
-
-            if (now_parts.tm_min == 0) and (now_parts.tm_hour > 7 and now_parts.tm_hour < 19):
-                subprocess.run(GPIO_TOOL+DAY_BRIGHT)
-            else:
-                subprocess.run(GPIO_TOOL+NIGHT_BRIGHT)
- 
-        time_str = time.strftime(CLOCK_FORMAT, now_parts)
-        temp_str = TEMP_FORMAT % mean_temp
+            if now_parts.tm_min == 0: 
+                set_brightness(now_parts)
 
         if time_str != old_time:
             clock_box.draw_text(fb_img, time_str, jitter_pos)