# Is there a way to calibrate ambient light sensors **URL:** \ **Category:** Questions & Help\ **Tags:** homey-pro\ **Created:** [January 14, 2025, 7:23pm UTC](https://community.homey.app/t/is-there-a-way-to-calibrate-ambient-light-sensors/127734 "2025-01-14T19:23:50Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Viggo\_Kleven](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/viggo_kleven/32/124913_2.png) [@Viggo\_Kleven](https://community.homey.app/u/Viggo_Kleven)\ **Post date:** [January 14, 2025, 7:23pm UTC](https://community.homey.app/t/is-there-a-way-to-calibrate-ambient-light-sensors/127734/1 "2025-01-14T19:23:50Z")
Hi, Using Homey Pro (2023). I have two multisensors that show ambient light in LUX. These are: - Philips Hue motion sensor model 9290030675 (connected via Zigbee 3.0 directly to Homey Pro. - Namron Z-Wave multisensor 4512734 (connected via Z-Wave 3.0 directly to Homey Pro. In a given location my reference light-meter shows 170 Lux. Philips Hue motion sensor shows: Light: 759 Lux Temp: 24.1 ºC Namron multisensor shows: Light: 151 Lux Temp: 25.5 ºC Is there a way to calibrate sensors, ie. the value represented in the Homey Pro and being used in Flows to set thresholds etc. It’s a bit complex with multiple sensors that are giving different values for the same condition. If there is no way, would it be an idea to have a generic feature in Homey Pro to adjust these? Thanks! ---
**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\ **Post date:** [January 14, 2025, 9:20pm UTC](https://community.homey.app/t/is-there-a-way-to-calibrate-ambient-light-sensors/127734/2 "2025-01-14T21:20:04Z")
I’ve noticed this is (very) sensor dependent, and in general nowhere near real lux values (but I use cheap crap). The max lux of Sensor A = 80000, sensor B = 150 … Some apps provide for calibration (Aqara), it’s not in general. I decided to just use the sensor’s specific lux values, or the mean value of several combined: You could consider creating a grouped light sensor, in order for you to work with one general mean lux value. You can use an [advanced virtual device](https://community.homey.app/t/43287): Settings: ![1000041443](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/9/3/9384bdee521e3351373ac07d92f5d5708b4b5ca6.jpeg) Result: ![1000041447](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/b/9/b90b2c8687c7c8ee5ea55ed81f71d9619c109ad7.jpeg) ---
**Author:** ![Viggo\_Kleven](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/viggo_kleven/32/124913_2.png) [@Viggo\_Kleven](https://community.homey.app/u/Viggo_Kleven)\ **Post date:** [January 15, 2025, 6:40am UTC](https://community.homey.app/t/is-there-a-way-to-calibrate-ambient-light-sensors/127734/3 "2025-01-15T06:40:35Z")
Hi Peter, Thank you for pointing out Advanced Virtual Device, which is new to me, appreciated! It is a good idea to group multiple sensor into a single mean value. However, I have multiple zones and must keep these apart. I am just looking for a way to make them more alike so that thresholds etc can be more similar and not all over the place for each sensor - or brand of sensor. I will learn more about AVD and also if the Better Logic Library can help so a custom virtual decive can scale the values as I want. I may, however, consider swapping out to one type only, for example the Namron that is closest to the reference. ---
**Author:** ![Arie\_J\_Godschalk](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/arie_j_godschalk/32/63027_2.png) [@Arie\_J\_Godschalk](https://community.homey.app/u/Arie_J_Godschalk)\ **Post date:** [June 6, 2025, 6:07pm UTC](https://community.homey.app/t/is-there-a-way-to-calibrate-ambient-light-sensors/127734/4 "2025-06-06T18:07:28Z")
I kinda do the same. In my backyard, i have multiple lux and motion sensors and lights, running on an chronograph timer. For my backyard i have created an AVD with motion, lux, light and the timer, and group all backyard-devices in rhe motion, lix and light reflect. This way the lux is the mean value of multiple devices. I must say, it works kinda perfect. And if a lix fails to send it value for a while, i have the exclution time on 3600 seconds (1 hour). I created the same device for my frontyard and my halway below and above.