Added the documentation for a new component - poolsense (#13842)

Co-authored-by: Klaas Schoute <klaas_schoute@hotmail.com>
Co-authored-by: Franck Nijhof <git@frenck.dev>

source/_integrations/poolsense.markdown

@@ -0,0 +1,44 @@
+---
+title: PoolSense
+description: Instructions on how to integrate your PoolSense device within Home Assistant.
+ha_category:
+  - Sensor
+ha_release: 0.113
+ha_iot_class: Cloud Polling
+ha_config_flow: true
+ha_codeowners:
+  - '@haemishkyd'
+ha_domain: poolsense
+---
+
+[PoolSense](https://www.proautomation.co/) is a smart pool monitor that publishes data to the cloud via SigFox. PoolSense eliminates the time and effort spent fixing what’s wrong with your pool water. Accurate sensors, in the PoolSense smart pool monitor, send data to a cloud server in timed intervals. 
+
+There is currently support for the following information within Home Assistant:
+
+- Chlorine Level
+- pH
+- Water Temperature
+- Battery
+- pH Status Indicator
+- Chlorine Status Indicator
+
+## Configuration
+
+You will need to use the associated standalone app for this device to register a username and password.
+
+- [Google](https://play.google.com/store/apps/details?id=co.proautomation.app.poolSense&hl=en_ZA)
+- [Apple](https://apps.apple.com/us/app/poolsense/id1288535609)
+
+Home Assistant offers PoolSense integration through **Configuration** -> **Integrations**. Click the `+` sign and from the list of integrations select **PoolSense**. Simply enter `username` and `password` when prompted.
+
+## Tips
+
+It is recommended that you create your own card with the following sensors:
+
+- `sensor.poolsense_chlorine`
+- `sensor.poolsense_ph`
+- `sensor.poolsense_battery`
+- `sensor.poolsense_temperature`
+- `sensor.poolsense_last_seen`
+
+Leave `sensor.poolsense_ph_status` and `sensor.poolsense_chlorine_status` as badges.