From 12a49d6da5b5ad50f5bf0eafdae868b582fd4af6 Mon Sep 17 00:00:00 2001
From: Sebastian Kroll <info@skroll.me>
Date: Sat, 19 Jan 2019 15:58:42 +0100
Subject: [PATCH] added c02-alert-treshold configuration option

---
 HISTORY.md             | 3 +++
 README.md              | 2 ++
 index.js               | 1 +
 package.json           | 2 +-
 service/eveatmo-co2.js | 2 +-
 5 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/HISTORY.md b/HISTORY.md
index 9e356d4..a876bcc 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,5 +1,8 @@
 ## version history
 
+### 0.4.3
+- added configuration-option to override the alert-state threshold for the extra co2-sensors (https://github.com/skrollme/homebridge-eveatmo/issues/24)
+
 ### 0.4.2
 - hopefully fixed a problem which caused the low-battery warning to persist even after replacing the module's battery (https://github.com/skrollme/homebridge-eveatmo/issues/21)
 
diff --git a/README.md b/README.md
index 0c6afc2..b40620d 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,7 @@ Because this plugin's base was taken from [homebridge-netatmo](https://github.co
             "platform": "eveatmo",
             "name": "eveatmo platform",
             "extra_co2_sensor": false,
+            "co2_alert_threshold": 1000,
             "ttl": 540,
             "auth": {
     	        "client_id": "XXXXX Create at https://dev.netatmo.com/",
@@ -33,6 +34,7 @@ Because this plugin's base was taken from [homebridge-netatmo](https://github.co
 ```
 
 - **extra_co2_sensor:** Adds an extra CO2 sensor which is available via Apple's stock Home.app, too.
+- **co2_alert_threshold:** Sets the co2-level [ppm] at which the sensors switch to alert-state
 - **ttl:** Seconds between two Netatmo API polls. Lower is not neccessarily better! The weatherstation itself collects one value per 5minutes, so going below 300s makes no sense
 - **auth:** Credentials for the Netatmo API
 
diff --git a/index.js b/index.js
index 9a6d32c..b32004d 100644
--- a/index.js
+++ b/index.js
@@ -17,6 +17,7 @@ class EveatmoPlatform {
 		this.foundAccessories = [];
 
         this.config.extra_co2_sensor = typeof config.extra_co2_sensor !== 'undefined' ? Boolean(config.extra_co2_sensor) : false;
+        this.config.co2_alert_threshold = typeof config.co2_alert_threshold !== 'undefined' ? parseInt(config.co2_alert_threshold) : 1000;
 
 		// If this log message is not seen, most likely the config.js is not found.
 		this.log.debug('Creating EveatmoPlatform');
diff --git a/package.json b/package.json
index 869558a..6fef959 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "homebridge-eveatmo",
-	"version": "0.4.2",
+	"version": "0.4.3",
 	"description": "Homebridge plugin which adds a Netatmo weatherstation as HomeKit device and tries to act like Elgato Eve Room/Weather",
 	"license": "ISC",
 	"keywords": [
diff --git a/service/eveatmo-co2.js b/service/eveatmo-co2.js
index 17f4806..0768edd 100644
--- a/service/eveatmo-co2.js
+++ b/service/eveatmo-co2.js
@@ -45,7 +45,7 @@ module.exports = function(pHomebridge) {
         }
 
         transformCO2ToCarbonDioxideDetected() {
-            return (this.accessory.co2 > 1000 ? Characteristic.CarbonDioxideDetected.CO2_LEVELS_ABNORMAL : Characteristic.CarbonDioxideDetected.CO2_LEVELS_NORMAL);
+            return (this.accessory.co2 >= this.accessory.config.co2_alert_threshold ? Characteristic.CarbonDioxideDetected.CO2_LEVELS_ABNORMAL : Characteristic.CarbonDioxideDetected.CO2_LEVELS_NORMAL);
         }
     }