Portable cloud & sky quality detector
The improved version of our previous PocketCloudWatcher. The portable solution for cloud detection, measuring sky quality, measuring the temperature, the relative humidity, the dew point, detecting wind, with GPS location, and all of it accessible from the phone and the PC.
Not to be permanently installed outside. Not rain resistant.
All of it in a box of 71 × 71 × 27 mm that weighs under 85 g.
IR sensor for cloud detection.
Light sensor: sky brightness expressed in mpsas (mag/arc.sec2), read through a dichroic UV/IR filter.
Ambient temperature sensor. The dew point is worked out from it and the humidity.
Relative humidity sensor.
Atmospheric pressure sensor.
Wind detection. A crude measurement, but enough to know that it is windy.
Built-in GPS. The coordinates and the time go into the data output.
Includes 2.4 GHz Wi-Fi.
All of it accessible from the phone and the PC. Free app for iOS and Android.
Safety Monitor and Observing Conditions, either via http or file.
For each of the readings, for the battery level and for the data updates (the “watchdog” function).
Through its USB-C connector, which also charges the battery.
Works with an internal rechargeable LiPo battery (optional).
Sleep relaxed while it monitors the sky and the ambient conditions, and wakes you up in case of trouble.
These are just a few examples: any ASCOM-Alpaca, INDI or INDIGO compatible software will work with the PocketCW2, not only the ones listed above.
No need to install: download it, run it, configure, and delete it when you're done. See downloads.
If you are looking for a full feature sky weather conditions cloud detector that can be permanently installed outside, choose our CloudWatcher high precision and low-cost system for monitoring the sky conditions and measuring sky quality.
Portable use only. The PocketCW2 is not to be permanently installed outside, and is not rain resistant.
Live readings, configurable alarms and the choice of alert sound, from the phone or from the desktop.
A short animated introduction to the pocketCW2.
| Dimensions | 71 × 71 × 27 mm |
| Weight | < 85 g |
| Power | USB-C (also charges internal battery) |
| Battery | Internal rechargeable LiPo (optional) |
| Connectivity | Wi-Fi 2.4 GHz + USB-C |
| GPS | Built-in |
| Cloud detection | IR sensor |
| Sky quality | mpsas (with dichroic UV/IR filter) |
| Protocols | ASCOM-Alpaca, INDI, INDIGO |
| Scripting | Lua, built in |
| Sensors | IR, humidity, temperature, pressure, light, wind |
| Outdoor use | Not for permanent install—not rain resistant |
The pocketCW2 is the improved version of the pocketCW, launched in 2018, which made Sky & Telescope’s Hot Products list in 2019.
Build your own integrations with Lunaticoastro devices. Every command travels over plain HTTP, USB or UDP—one protocol shared across the whole range, so what you learn on one device works on the next.
Explore SLP391 commands · 12 devices · try one from your browser
Every command the pocketCW2 understands, over HTTP, USB or UDP. For scripting and your own integrations.
Full documentation including first-steps guides for smartphone and computer setup.
Go to documentation →Windows software, ASCOM and USB drivers, firmware and the configuration tool.
Go to downloads →How-to guides, integration tutorials and software configuration.
Browse docs →