Skywatch® IoMET

IoMET weather station

The IoMET measures wind speed, temperature and relative humidity. It was developed for fine-granularity outdoor weather measurements or micro-climatic conditions within greenhouses or vertical farms:

  • An omnidirectional wind turbine which measures the wind horizontally and vertically.
  • Integral shield for humidity and temperature sensors.
  • Solar irradiation*
  • Ease of deployment: mount in seconds
  • High autonomy: three years continous use
  • Rechargeable lithium-polymer battery
  • Solar-power for completely autonomous operation*
  • Rugged, waterproof housing

* available to special order

Applications

Fruit crops

Measure fine-granularity climate to enable optimum irrigation

Greenhouses

Micro-climate measurement within greenhouses

Crop research

Maintain optimum germination conditions

Harvesting prediction

Determine crop readiness for harvesting

Yield improvement

Measure crop stress and ensure regular growth to avoid skin cracking

Technical data

The IoMET measures the following:

  • Wind speed
  • Humidity
  • Temperature
  • Barometric pressure

The data is transferred via LoRa over The Things Network and the packet format is as follows:

TTN

Each weather station has a serial number used as unique id for TTN.

The Deveui will be 0x31353430 + 4 bytes serial number
exemple for a SN of 4000 : DevEui= 0x3135343000000FA0

The AppKey is user-configurable

The IoMET comprises the weather station and a mounting bracket which may be attached by screws or straps to a perpendicular surface.

To fix the weather station to the bracket:

  • Unscrew the heat shield from the humidifier probe at the bottom of the unit
  • Make a 12mm hole in the bracket and pass the humidifier probe into the hole from above
  • Replace the heat shield

Measurement

 Temperature Humidity Pressure Wind speed
Units of measurement Degree Celsius RH % hPa m/s
Resolution 0.1 °C 0.5% 0.1 hPa 0.01 m/s
Precision +- 0.3 °C 2% +- 0.05 hPa +- 1 m/s
Range of measurement 0°C to 65°C 10% to 90% 260 to 1260 hPa 0 m/s to 50 m/s

Wireless

  • LoRaWAN class A
  • Specification 1.0.2 revision B
  • Europe 863 – 870 MHz

Battery

  • LiPo 1C 3.7V 1580mAh
  • 1 year autonomy (at 1 measure every 15mn)
  • Power supply via micro USB rechargeable battery, with battery charge indicator

Maintenace

Opening the case

Access the board-mounted micro-USB connector to configure and charge the device, unscrew the top screw and gently remove the top.

Closing the case

Ensure that the O-ring seal is clean and intact to prevent moisture ingress. Gently apply the top case half to the bottom case half.

Replace the top screw, ensuring it is fully-seated (there is another O-ring between the top-screw and the case) and the circlip holding the top screw captive is intact.

Battery level

The battery level is sent across lora in a specific packet every 24h

0 to 100% with a resolution of 1 LSB = 0.5%

Plug in the micro-USB cable to recharge the battery. A complete charge take 3h. The charge indicator is on until the charge is complete.

  • You need first to add your device to TTN
  • Go to applications 
  • Create an application
  • In the application go to End devices
  • Register end device
  • Enter given DevEUI and AppKey and click on Register end device
  • Open the top case
  • Connect the battery
  • Now your data will be sent on TTN !