diff --git a/content/.obsidian/workspace b/content/.obsidian/workspace
index ae11e41..1bc5fad 100644
--- a/content/.obsidian/workspace
+++ b/content/.obsidian/workspace
@@ -4,12 +4,12 @@
     "type": "split",
     "children": [
       {
-        "id": "7f0602e2f0f19f5d",
+        "id": "e466de4f93356253",
         "type": "leaf",
         "state": {
           "type": "markdown",
           "state": {
-            "file": "QotNews.md",
+            "file": "Sensors.md",
             "mode": "source",
             "source": false
           }
@@ -69,7 +69,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "QotNews.md",
+                "file": "Sensors.md",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -86,27 +86,28 @@
             "state": {
               "type": "outline",
               "state": {
-                "file": "QotNews.md"
+                "file": "Sensors.md"
               }
             }
           }
-        ]
+        ],
+        "currentTab": 1
       }
     ],
     "direction": "horizontal",
     "width": 300
   },
-  "active": "7f0602e2f0f19f5d",
+  "active": "e466de4f93356253",
   "lastOpenFiles": [
-    "QotNews.md",
+    "Sensors.md",
     "Protospace.md",
-    "t0txt.md",
-    "Notica.md",
+    "Plant Waterer.md",
+    "QotNews.md",
+    "Solar Car.md",
     "Spaceport.md",
+    "t0txt.md",
     "Backup Strategy.md",
-    "p.md",
-    "media/Screenshot from 2022-05-18 16-24-38.png",
-    "media/Pasted image 20220518162452.png",
-    "media/Pasted image 20220518162414.png"
+    "Notica.md",
+    "p.md"
   ]
 }
\ No newline at end of file
diff --git a/content/Backup Strategy.md b/content/Backup Strategy.md
index 439883f..f588635 100644
--- a/content/Backup Strategy.md	
+++ b/content/Backup Strategy.md	
@@ -165,7 +165,7 @@ The `tbotbak` user has write access to the `/mnt/backup/remote/tbotbak` director
 
 I run a lot of services for [Protospace](https://protospace.ca/), my city's makerspace.
 
-The member portal I wrote called [Spaceport](https://my.protospace.ca/) creates an archive I download daily:
+The member portal I wrote called [[Spaceport]] creates an archive I download daily:
 
 ```
 40 10 * * * wget --content-disposition \
diff --git a/content/Sensors.md b/content/Sensors.md
new file mode 100644
index 0000000..34925dc
--- /dev/null
+++ b/content/Sensors.md
@@ -0,0 +1,17 @@
+Title: Sensors
+Date: 2022-05-24
+Category: Notes
+Summary: A dashboard for various sensors around my house.
+Short: d
+
+I wrote a custom [dashboard](https://sensors.dns.t0.vc/) to visualize data from various sensors around my house. I'm a huge fan of sensors because they're at the intersection of what I love: electronics, home automation, and data hoarding.
+
+You can find the [source code](https://git.tannercollin.com/tanner/sensors) on my Gitea.
+
+![[sensors1.png]]
+
+Most of the data is captured by two cheap RTL-SDRs (software-defined radios) that are set to listen to 433 MHz and 915 MHz radio frequencies. I use the open-source project [rtl_433](https://github.com/merbanan/rtl_433) to automatically decode the signals and forward them to an MQTT broker, which is a messaging server that services can publish and subscribe to. Other sensors run an MQTT client directly or expose their data through other means like a web interface that I poll.
+
+The data gets collected by a central Python script that process and stores it in an InfluxDB database for "efficient" storage. The script also runs a web server that queries the database and exposes the data over an API to the dashboard at various dates and ranges. The dashboard is written in JavaScript / React using a simple chart library.
+
+My biggest regret was using InfluxDB. It's a stupid database and I wouldn't recommend it to anyone. The documentation is confusing and I ran into timezone issues with `group by time()`. It also assumes the column data type is an integer if your sensor happens to send it a whole number at first and it won't let you change that. Just stick to Postgres / SQLite.
\ No newline at end of file
diff --git a/content/media/sensors1.png b/content/media/sensors1.png
new file mode 100644
index 0000000..bd59e29
Binary files /dev/null and b/content/media/sensors1.png differ