Make the firmware request the next wakeup time instead of sleeping always 24h

Author: nrother

firmware/epaperinfodisplay.yaml

@@ -113,8 +113,9 @@ http_request: # required by online_image
   verify_ssl: false #not supported on the Arduino framework
 
 deep_sleep:
+  id: my_deep_sleep
   run_duration: 1h # we explicitly enter deep sleep
-  sleep_duration: 24h # TODO: Add a time component and use until: to wakeup in the night
+  sleep_duration: 24h # default
 
 script:
   - id: download_image_script
@@ -124,6 +125,20 @@ script:
       #     format: "VCC is %.1f V"
       #     args: ['id(vcc_sensor).state']
       - component.update: frame_image
+      - http_request.get:
+          url: !secret wakeup_time_url
+          capture_response: true
+          on_response:
+              - lambda: |-
+                  if (response->status_code == 200) {
+                      int next = std::stoi(body);
+                      id(my_deep_sleep).set_sleep_duration(next * 1000);
+                  } else {
+                      id(my_deep_sleep).set_sleep_duration(6 * 60 * 60 * 1000); // default to 6h
+                  }
+          on_error:
+              - lambda: |-
+                  id(my_deep_sleep).set_sleep_duration(6 * 60 * 60 * 1000); // default to 6h
   - id: update_display_script
     then:
       - wifi.disable: # disable wifi after image was downloaded

firmware/secrets.yaml.example

@@ -2,4 +2,5 @@ wifi_ssid: "MyWiFi"
 wifi_password: "changeme"
 ota_password: "changeme"
 fallback_ap_password: "changeme"
-image_url: "http://192.168.178.21:5000/frame.png"
+image_url: "http://192.168.178.21:5000/frame.png"
+wakeup_time_url: "http:///192.168.178.21:5000/next_wakeup_time"

software/app.py

@@ -262,6 +262,17 @@ def frame_image():
         return "No image available", 404
     return send_file(BytesIO(last_image), mimetype='image/png')
 
+@app.route('/next_wakeup_time')
+def next_wakeup_time():
+    """Tell the hardware in how many minute to check back. """
+    now = datetime.now()
+    next_wakeup = config['wakeup_time']
+    next_wakeup_dt = datetime.strptime(next_wakeup, "%H:%M").replace(year=now.year, month=now.month, day=now.day)
+    if next_wakeup_dt <= now:
+        next_wakeup_dt += timedelta(days=1)
+    seconds_until_next_wakeup = int((next_wakeup_dt - now).total_seconds())
+    return str(seconds_until_next_wakeup)
+
 @app.route('/status')
 def status():
     """ Serve the current status information. """