Home assistant clear notifications. Last working Home Assistant release (if known): None.

Home assistant clear notifications. Send a Home Assistant notification that always replaces the last one sent: Secure access to Home Assistant just requires you to add an s to the schema. When you use the local ip you have to use https:// and then advance Feb 18, 2023 · This is the YAML for the Automation:-. This is also used for low battery sensors, water leak sensors, or any condition that may Feb 11, 2022 · The first major change that we want to cover is for Local Push Notifications. Restart Home Assistant. I set up the app on iOS, I see that my iphone shows up in the integrations area with one device and 18 entities. target. So trying to work out here. 2 Python 3. Paste this into your configuration file: Replace the name and the chat_id with your data. Aug 11, 2021 · Hi everybody, I used to use telegram exclusively for notifications; recently I switched to the Home Assistant companion app for certain things, for example reminders. Changing the title here changes the button title in the actionable notification. states. Flexible Notification Services: I’ve added the option to notify multiple devices directly without relying on notify groups. yaml) named python_scripts. Use notify groups and send your message to group entity, rather than individual echo devices. data. May 13, 2021 · Then you just call script. 5, the vast majority of functionality is now shared across both platforms. One of my devices needed home assistant to be reinstalled. 4 KB. Some launchers offer a setting to allow all notifications to be expanded. mobile_app_<device ID> where <device ID> will be the name of your mobile device integration in Home Assistant. Here is my code for the automation. home_email. For example, if the garage door is left open, the alert integration can be used to remind you of this by sending you repeating notifications at customizable intervals. Last working Home Assistant release (if known): Description of problem: Can not clear a persistent notification that has been replied. Below is a list of common issues and troubleshooting advice to address them. Screenshot from 2021-01-23 08-15-34 812×87 8. Home Assistant seemed to have discovered a “HomeKit Accessory: Smart Bridge 2”. g 1 automation is triggered if a door sensor opens and after some time sounds a siren. Jan 20, 2024 · This script allows you to specify the title, message, unique persistent notification ID, the dismiss text, and timeout, in minutes, of a notification that is sent to all mobile devices and the HA dashboard. message: Here is a list of unavailable entities Critical notifications were introduced in iOS 12 and are designed for sending high-priority notifications that you don't want to miss - for example security system, water leak sensor, and smoke/CO2 alarm alerts. This integration uses the Smart Device Management API and Google’s Cloud Pubsub to efficiently listen for changes in device state or other events. 4 Describe the bug clear_notification for iOS Notifications is only working when Local Dec 6, 2023 · Although the old phone might not be in use, the notifications are being sent to it. mterry63 (Martin) December 6, 2023, 1:44pm 3. Authorize the integration by selecting Allow on the bottom right of the screen. As part of this, the notifications documentation has been extensively updated as well. Powered by a worldwide community of tinkerers and DIY enthusiasts. A reminder blueprint for Home Assistant. Phone model: Oppo Find X2 Pro (ColorOS 11) Xiaomi Mi 9 (MIUI 12. It uses the URI action to take me to a lovelace dashboard, but when I test the automation, it doesn’t clear. Then add a file to the <config>/python_scripts directory named dismiss_notifications. andrey. Under the Actions: section, this is where you add the 3 actions you created. All works fine if I just put plain text in the message. On the user interface, you will be asked if you want to set up this device with the Z-Wave JS add-on. Aug 16, 2022 · iOS device model, version and app version Model Name: iPhone 12 Pro Software Version: 15. This event can then be used in an automation allowing you to perform a wide variety of actions. I did had some messages in my Unifi controller (running as add-on on hassio) and a system metric shows that 97. 4) Home Assistant version: core-2021. It caveats that target and data are only for “some platforms” though. I’m on. As suggested, you should check that the phone ID didn’t change during the upgrade. Aug 5, 2023 · The mobileapp notify platform accepts the standard title, message and target parameters used by the notify platform. 358 Home Assistant Core Version 8. Go to your android notification settings, choose the HA app and then disable the channel SensorWorker. We will use the service notify. Replace the notify service with your mobile phone. notify: - name: pushover. Let me know if you need help setting it up. CounterclockwiseTea. Feb 12, 2020 · robbiet480 changed the title Feature Request: Notification clickAction to open specific HA navigation path Notification clickAction to open specific HA navigation path Feb 12, 2020 robbiet480 added enhancement New feature or request notifications labels Feb 12, 2020 Apr 21, 2023 · Actionable Notifications in iOS. To use it, you have to set up at least one notification target (notifier). makes it possible to send notifications to a wide variety of platforms. And they allow you to quickly build an automation that triggers on a condition, and then can send notifications at either dynamic or static intervals until that condition has cleared. trigger: - platform: state. In the chat with the new bot, enter /start. 110 and the app crashes after clicking "continue" during set up, you need to add values for internal_url and external_url. Of course, all notifications that were delivered for all devices (browser, mobiles, tablets etc. karpushin: I have more than 6000. After the install and logging in the device no-longer receives notifications. After replying there is a spinning loading symbol seemingly indefinitely. - alias: Notify of Motion. Pronown (sudo) August 5, 2023, 3:02am 4. The notification disappear when the door/window/sensor leave its defined state. These notifications can be sent to either iOS Mar 7, 2021 · This will give you a repeating notification until the sensor changes back to off. From the conversation with BotFather, select the link to open a chat with your new bot. Now notifications can be delivered directly from your Home Assistant server if you have remote access set up. Apr 29, 2022 · Apple has no indicator showing an actionable notification is any different from a regular notification, so you either have to write text indicating this, or remember this fact. mobile_app service in the Developers → Services area, however, I do not. 1 ⏬ Latest Version | 🔗 Github Link | 🕵🏻 Compare Changes Forked from Home Assistant’s Confirmable Notifications Features: 📲 Sends notification to Home Assistant Companion 3️⃣ Up to 3 customisable, action buttons (Previously: Confirm and Dismiss Button) ⌛️ Timeout actions with custom duration, fired if no option response received 🧹 Clear notification after Feb 11, 2021 · To clear an android notification you send the clear_notification message to the mobile_app target. Select Submit. Jul 5, 2023 · Hello, I am seeing a notification counter on the menu bar: But once I click, no notifications are displayed: Restarting home assistant doesn’t seem to help. 5. balance_pump_state to: Clear - platform: state entity_id: sensor. Before this release, all notifications were routed via Google. Jul 2, 2021 · Mobile Apps Home Assistant Companion for Apple. Thanks @Burningstone. VDRainer (🍻) May 16, 2020, 9:44pm 2. Troubleshooting. Perfect to run on a Raspberry Pi or a local server. They need some love tbh. Usefull examples. Optionally change the display name and select Done at the bottom of the screen. The companion app allows me to send clear_notification to a particular tag, thus allowing me to get rid of that notification without user interaction. The action can be of any name like STOP_THE_SIREN. If this would be possible the awtrix display could be integrated in a more general way IMHO. Hi, it seems that my storage is almost full. mobile_app_myphone. One of the first things I see in the troubleshooting section here: says that I should see a notify. The mobile\app notify platform supports targets as services. This one detects when a persistent notification is created and reports it in the system log. Hello, I am seeing a notification counter on the menu bar: But once I click, no notifications are displayed: Restarting home assistant doesn’t seem to help. Apr 1, 2019 · Then create a directory in your <config> directory (i. Apr 3, 2024 · Floors are a new way to organize your areas per level of floors in your home. In order to not overload Home Assistant with log data, only the 50 last errors and warnings will be stored. g. of notifications or those with “critical status” or unlimited with dependency from the entire HA database recorder history. trigger: action: service: notify. The first does send a notification, the first should clear it but it does not. michaelthompson1991 (Michael Thompson) April 21, 2023, 10:51am 1. 3 and lately I am seeing a “New devices discovered” notification on my Lovelace interface. You can try looking at other launchers in the play store to find one that has this particular setting. To get the notification ID use a template…. a window or a door. 3. description: UNIFI Notify if Unifi Gateway Alert. Look for notification "tags" in the documentation which is essentially a unique ID you give your notification. Not sure if this is relevant. Jan 23, 2021 · It displays the messages as seen below. data: message: "Hey awtrix {{ some data here }}" and then this text should be displayed on the awtrix display. I prefer Telegram for most notifications and actions as it shows essentially a log / chat history with my house; it's great to see a history of camera notifications, alerts, questions etc from the house in the one place. If it was, it sends a command to the delay node (labeled variable). However, it just don’t seem to work. You use the trigger in #2 to trigger ANOTHER automation. To prevent this, either (a) clear them in the web/mobile app or (b) utilize the clear_notifications button provided by the alarm control panel. The notification_id is the same as the persistent notification entity’s object ID. Actionable notifications are a unique type of notification as they allow the user to add buttons to the notification which can then send an event to Home Assistant once clicked. Last working Home Assistant release (if known): None. Well it turns out you can use clear_notification in the done_message: parameter of an alert, and the notification will clear when the alert turns off! Dec 14, 2023 · Choose a media_command from the provided list, and specify the media_package_name with the package name you want to control. For more support please look at the more help page. 12. Try out the examples (at the end of this article) Use the script in your automation to send notifications to your mobile device. 94. Jun 10, 2019 · Disk almost full. Android version: 11. I have successfully changed the LED Indicator Color by passing in a color to parameter 13. 2. Apr 25, 2022 · What you are seeing is the behavior of the launcher on the device. Have an Automation that sends a Critical notification every 10 seconds if the flag is true. Please make the feature to save notifications history. every Home Assistant device. May 10, 2021 · Notifications are a popular feature of the Companion apps, but the differences between Android and iOS made it painful to use them to their full potential. 1. Edit a camera in Blue Iris and navigate to the Alerts tab, then select the On Alert action at the bottom. Sep 23, 2023 · What I want to do seems like it should be simple - when an automation triggers, have it send a notification to my phone with an “ok” button, and let the “ok” button clear the notification. If you are running Home Assistant 0. I’ve tried porting this automation, see below: alias: Actionable notifications for Android. Notifications are working to both of the Android 14 Pixels in this household. delay payload. It is also standard behavior to show the first notification expanded and not the others. I am on v0. Most likely, your dongle will be recognized automatically. deechtewber (Wouter) December 6, 2023, 2:38pm 4. me data: message: clear_notification data: tag: sensor_1 push: badge: {{ sensor. 4. I am not sure if the ISY-994iz was clearing the jammed state after an observed state change OR a zwave_js issue. iOS 13. If you send a second notification with the message "clear_notification" then it gets removed. This section waits until I choose one of the 3 options. pause. Or if you really have to you could stop HA and then delete the database but then you lose everything…. Thanks @jaaem for the automation. Follow these steps: Open the Home Assistant user interface. No sometimes you forget or accidentaly swipe away a notification on the phone and I would like to have a more persistent oveview of which sensors triggered and what automation was then triggered. write data_template: message: "Persistent Push notifications to a phone will only be provided if the following conditions are met: The Push notifications switch in Home Assistant is ON. Thank you. , the directory that contains configuration. data. dismiss service. I’m trying to set the LED notifications using the call service feature. See Supported Devices for all devices supported by the SDM API. provides two proxy views to proxy media content from your Home Assistant instance so you can access thumbnails and video clips from within the context of Home Assistant without having to expose your UniFi Protect NVR Console. What am I missing here? - alias: Notify pump state is clear trigger: - platform: state entity_id: sensor. I can see that there I recently made a package for Node-RED that lets you easily automate the notifications and also allows for easy scene control for their Red series switches. Turn Spoken notifications on or off. Feel free to share thoughts, faults and improvements. An “Actionable Notification” disguised as a regular notification: 1170×2532 143 KB. However, after using the switch toolbox to Dec 18, 2019 · You can’t… they will drop off depending on your recorder/logger settings though…. Anyway, this is the example from the home assistant page. front_house_motion. The idea is to have a card with all notifications delivered by Home assistant. iOS gives special priority to this type of notification. Apr 18, 2023 · I have a notification group setup of the two Home Assistant companion app using Android devices: notify: - platform: group name: Family services: - service: mobile_app_galaxy_a32 - service: mobile_app_pixel_3a I would like to send an actionable notification to that group whenever the front gate is detected to be open, with the option to close it. 3(2022. Hi all HA Guys, I’m having hard times in automating a critical alert in my configuration. Accepted media commands: fast_forward. You simply add it to your Home Assistant instance by clicking the import Notifications. A list of app package names can be obtained with any of the package list apps from the Play Store. Views. May 16, 2020 · Checking notifications’ history log is useful, to check if you missed some critical notifications. You could limit no. Set up an actionable notification. play. This means that we no longer create an entity for each persistent notification. Use the ‘Go to YAML mode’ and click on the “Fill example data” to send notification example to all mobile devices. 3. Aug 2, 2023 · Add a notification action. For NVRs, both the global and channel switch are ON. Oct 8, 2022 · A sensor that shows the latest notification and hold the history of notifications. There is currently support for Note that when Home Assistant restarts, SIMPLISAFE_NOTIFICATION events will fire once again for any notifications still active in the SimpliSafe web and mobile apps. The alert integration is designed to notify you when problematic issues arise. cogneato (Cogneato) March 11, 2022, 6:20pm 5. Ouch. Is there a setting I am missing? This is my simple test flow: Jun 19, 2019 · Configuration. - alias: persistent_notification_clear_pwned mode: parallel trigger: - platform: event event_type: call_service event_data: domain: persistent_notification service: create condition: - condition: template value_template Home Assistant is open source home automation that puts local control and privacy first. If CCTV at front of house detects motion then send pop up notification to. py and enter the following code into it: for notif in hass. frontegi (Giulio F) September 12, 2019, 1:10am 1. 4integration (4integration) March 7, 2021, 2:06pm 3. - id: '1662560952541'. description: "". I am Feb 16, 2022 · I trying to get the name of the entity that triggers the below automation into the message bod, without success. Jan 3, 2023 · Go to the Developer Tools → Services and test the new script. In one of my automations I send a message to all users that a specific event has been triggered. ). notify. Remember that those listed fields are available in templates as trigger. the message title and data string is sent, just not the picture or live camera entity. play_pause. write data_template: message: "Persistent notification created. The Push-notification in the Reolink App of that phone is ON. I found a backup of HA that had my SSH credentials in it so I was able to get in, remove the IP Ban, and the SSL settings. Plug the Z-Wave dongle into the device running Home Assistant. 6 App version: 2022. Older entries are automatically discarded from the log. Sep 3, 2023 · So for example to call from some trigger something like that: service: notify. Feb 10, 2022 · It’s Home Assistant, so automate it. I’ve cobbled together some stuff from things I found in the docs (see here: - alias: "Dryer Finished" trigger: platform: state entity_id: senso - Pastebin Sep 12, 2019 · Mobile Apps Home Assistant Companion for Apple. There’s no NTFY integration in Home assistant. As @Stiltjack mentioned you can use the persistent_notification. . New periodical notification with adjusable duration actionable notification to stop periodical Turn spoken notifications on or off. 9 virtual env. Notify Group - Home Assistant. When you press the button on the notification of the app, a trigger mobile_app_notification_action with event data STOP_THE_SIREN is fired. I am very sure that is my Lutron Smart Bridge (non Pro), but I am not using HomeKit and I doubt I will in the future. I had seen complex solutions with automations detecting alert events or persistent notifications creations to then call another notification service, but I think I found a more straightforward solution. 1-full. The device is an iPhone 13. Dec 27, 2021 · However, after moving the same locks to Home Assistant as z-wave nodes, the binary sensor for the jammed condition will not clear when the manual lock / unlock or RF lock / unlock is executed. So I believe I have all the sensors setup correctly. Jan 22, 2023 · I am trying to send a picture to the Android notification from Node Red. kreene1987 May 14, 2021, 5:44pm #3. 91 KB. For example, there is a notification asking to empty the dishwasher when it is May 27, 2021 · I am trying to clear iOS notifications using the (for iOS) new ‘clear_notification’. I'm on Android so I don't know whether or not iOS permits the same. Simply list your desired notify services, separated by commas. data: title: Unavailable Entities. Or create a service which takes an external variable as message and put all your echo devices under that service. As with the media identifiers, all IDs are UniFi Protect Sep 9, 2021 · This blueprint will run at a specific time and day of the week and will provide you a list of unavailable entities { {entities}} that could be used in one or more actions (I use it to send a notification) Notification action example: service: notify. Actionable notifications, switch input Boolean. # Notifier notify: - platform: telegram name: "sarah" chat_id: 44441111. iedereen. @mboarman. data: message: clear_notification. app_badge_counter }} after I save and open it again, it gets rewritten to this: May 10, 2022 · So notification services are kind of weird. Now that we have an automation setup with our desired trigger, we can create an action that sends the push notification to our mobile device. I even tried the examples given in the Docs in the developer Mar 24, 2023 · Version 2. E. Jan 31, 2022 · I’m trying to troubleshoot why I’m not getting notifications on the Hass app on iOS. ago. Installation Home Assistant OS. The Push-notification in the Reolink app is independent of the Home Assistant setting. It works fine via home assistant but I'd like to keep my automations in node red. Hence hassio:// becomes hassios:// like so: Apprise - Push Notifications that work with just about every platform! - Notify_homeassistant · caronc/apprise Wiki. Home Assistant is open source home automation that puts local control and privacy first. Alert. No idea why. This delay node is set to a variable delay, that can be set with the msg. These are the testing scripts: sequence: - service: notify. As last, create a speaker group in alexa app and send your Mar 4, 2020 · As a user of the Home Assistant, who uses the IOS, Android and Web-based app too, I want to delete/clear all notification messages in one step from the list on the notification sidebar so that, I don’t have to delete them one by one because it is a very time-consuming method. . value: 67046092. 0. Sadly, this doesn’t work at all. As long as you granted notifications permissions during setup, you will 1 Like. Before building something from scratch I decided to search the Home Assistant forum for existing projects and found this great advanced medication reminder blueprint. Starting with today’s release of iOS 2021. mobile_app_<your_device_id_here>. To view your logs, navigate to Settings -> System -> Logs. entity_ids('persistent_notification'): Jan 25, 2022 · I have my alarm system set up and it sent notifications to a number of phones when an automation triggers. What happens after you “long tap”: 1170×2532 62. Use an Actionable notification that can set the Critical Notification flag Jun 5, 2023 · just as a heads up but also as an open question to the fellow HA users of persistent_notifications: Persistent notifications are no longer stored in the state machine. Hi, I tried implementing the new scheme fr notifications and wanted to use clear_notification for my GFs iPhone. 0 . Description of problem: I'm using an automation that notify user's mobile apps that some Aug 24, 2022 · browetd (Browet Didier) August 24, 2022, 2:53pm 2. On the window that opens: Login with your SmartThings account (if not already logged in). What it uses is the Apprise integration as middleware to take the message, transform it to the right format and send it on to a recipient. Aug 19, 2020 · You can use the event automation trigger, with the system_log_event event, and conditions to trigger notifications. Step 7: Home Assistant Config After all that, this is the easy bit. Dec 13, 2022 · Home Assistant version: 2022. Check the integrations list for one that fits your use case. I’m using the same syntax for my android phone with node-red, so it should be working. - alias: 'persistent notification created' trigger: platform: event event_type: call_service event_data: domain: persistent_notification service: create action: - service: system_log. As mentioned above, ensure that you have an MQTT broker configured. On your Android phone or tablet, say "Hey Google, open Assistant settings. If you want to send notifications to the Home Assistant web interface, you may use the Persistent Notification integration. This worked fine. entity }} which will give you which light triggered the automation … but an easier way is to use variables like this: alias: Lights Left On - Notification. Apr 13, 2022 · Alerts in Home Assistant are simply prebuilt automations that can deliver notifications. Available for free at home-assistant. I modified it a bit to rule all pwned notifications. - service: notify. The better Home Assistant knows your home and how it is spatially structured, the better it can help you. When the front gate is detected to be closed May 15, 2023 · How about this: Dismiss all persistent notifications script - #4 by pnbruckner. npeskoe: I’m new to Inovelli products and Home Assistant. bergasha (Bergasha) December 27, 2020, 10:26am 3. Mobile Apps Home Assistant Companion for Apple. entity_id: - binary_sensor. see: Complete persistent notifications migration by bdraco · Pull Request #92828 · home-assistant/core · GitHub as I have more than a few rather Mar 1, 2021 · Home Assistant Android version: 2021. I'm of course biased towards my own solution, but I know Node-RED isn't for everyone. Actions can be specified for when the notification is dismissed, these actions work both from the mobile notification or HA notification. initial_state: true. \ This automation is default set to only be able to run when no other automations are currently running as the idea of this blueprint is to clear the Dec 15, 2023 · Blue Iris Motion Notifications in Home Assistant. May 14, 2021 · data: parameter: '16'. Got it working by (for others wondering the same ): configuration. After that I was able to get back in a setup SSL again. I have a calendar event in local calendar which sends a push notification to my iPhone to water the indoor plants. The nest integration allows you to integrate a few supported Google Nest devices in Home Assistant. And although it doesn’t note it in fact title is not a given either. alias: Motion Detect Front of House. actionable_notifications, and pass your desired arguments for that situation. If you send a second notification with the same tag then it gets replaced. Apr 14, 2023 · Clear Notifications: Clear the notification when, for instance, a door or window has been closed again, so you know there’s no need to worry. previous. yaml. blueprint: name: clear_notifications description: "Clears notifications that gets stuck when the automations failed. May 18, 2020 · When that notification is sent, the event node labeled ‘iOS Notification’, picks that event up, and checks to see if it was the ‘robovac’ notification sent. This will keep the topic clear only for real alerts from Home Assistant. alias: '++A-UNIFI Notify if Unifi Gateway Alert (24DEC2020)'. We will look at how to set up Blue Iris motion notifications in Home Assistant below. The integrations Integrations connect and integrate Home Assistant with your devices, services, and more. Especially when it comes to future features like generating dashboards, voice commands, and maybe even AI-related features. Under "Personal," tap your headphones Spoken notifications. Dec 26, 2020 · Burningstone December 26, 2020, 10:35am 2. platform: pushover. I have created two minimal scripts for testing purposes. If I use the “test” under Dev Tools -> services , calling my iphone notification service with this Json: Feb 13, 2022 · anon63427907 February 13, 2022, 8:03pm 2. • 3 yr. Test the service: All within a Telegram chat. field_name. The notification works in general, but any content I want to add in the message does not get sent. Jan 14, 2023 · I decided to build a system based on Home Assistant instead. { {now Actionable Notifications. Mar 27, 2023 · The flow is that. For that purpose, scripts offer fields to set variables for the sequence section (equivalent to inputs in automations). message. next. tom_l December 18, 2019, 10:24am 5. Wait for trigger. Didgeridrew May 15, 2023, 2:20pm 4. Optional actions are also specified for when the Oct 13, 2023 · New to Home Assistant, so apologies if my question is potentially not clear. 4 Likes. io. event. 98. App crashes on set up . Sep 5, 2019 · I’ve tested the following two automations and confirmed they work. The notification platform lists the following 4 fields for its service: title. Nov 20, 2022 · action_vacdaily2. 🙂 What does it do? It creates a notification based on a defined state of a sensor, e. main_pump_state to: Clear - platform: state entity_id Oct 27, 2023 · But when I try to edit my send/clear notification automations like this: action: - service: notify. Nov 29, 2019 · Another potential workaround solution I’m planning on experimenting with is to make my “Critical” notification do the following: Set a Critical Notification flag to be true. Companion App 2. description: >-. Then When I call clear_notification that symbol disappears and the reply shows inline. Aug 19, 2020 · I just wanted to be able to use the persistent notification as an actual notification platform/service, so that it can be used in alerts or in notify groups. Tip: You can also turn off spoken notifications specific apps. Oct 4, 2022 · A simple blueprint to clear notifications that are “stuck” on android from when the automation stops for some reason. Alternatively if you prefer native Home Assistant automations there is a similar script you can use. But I can’t seem to find a way to do it. HA 0. 7% is now full of disk: What can I do to check and free up disk space again? Mar 10, 2022 · It was my SSL settings keeping me out. " Tap Devices. WTFoX74 (Martin) June 10, 2019, 2:06pm 1. Perform the action. Critical alerts always appear at the top of your lock screen above all other Apr 13, 2022 · If you want to get notifications that repeat until a condition is cleared (think door open after dark, or security issue, then you will want to check out the Aug 18, 2022 · Hi all - I’m struggling to clear an android notification when I click the notification button. These notifications do not count towards the rate limit and are shown on the device immediately Nov 15, 2019 · This one detects when a persistent notification is created and reports it in the system log. To know which trigger was activated (and therefore the entity linked with it) you can use { { trigger. data: tag: some_alert. Actionable notifications Building The system_log integration stores information about all logged errors and warnings in Home Assistant. I Select the SmartThings Location to add to Home Assistant. e. They can also send a message that the condition has cleared so you will Aug 7, 2022 · Hi there, just want to share my blueprint with you. tj qk lz bv bv ac vy mx eo lc