Cell2-Sky-Link-RS485-LTE/LAN for Wireless Sensors & Transmitters
The Cell2-Sky-Link-RS485-LTE/LAN, a member of the Nokeval Sky product family, serves as a base station for Nokeval 433.92MHz Sky transmitters. The base station receives measurement data, for example about air humidity, temperature or pressure, from wireless sensors using Nokeval’s Sky protocol and forwards this measurement data via the GSM network to the Ovaport service.
This facilitates dependable remote data collection from the field to Ovaport servers in a data centre. Nokeval’s third-generation Sky radio devices employ Semtech LoRa modulation on the 433 MHz ISM band, offering an impressive wireless range for battery-powered transmitters.
- Food service and hygiene
- Buildings and Environment
Specifications of the Base Station Transceiver
The base station offers an extensive operating temperature range, ensuring reliability even during power interruptions due to backup batteries. It is designed to be splashproof and comes preconfigured, requiring minimal attention after installation.
The device is suited for various environments, with a storage temperature range of -30 to +60 °C (non-condensing), an operating temperature range of -20 to +50 °C, and operational humidity from 5 to 95% RH (non-condensing).
It boasts an IP65 protection class, except for the power supply, which is rated IP20. Constructed from robust materials such as plastic (PC+ABS) and silicone, it is compatible with Nokeval Sky series 433 MHz ISM transmitters, Ovaport online service, and NCloud.
The base station’s dimensions are as follows: length 219 mm, width 133 mm, and depth 68 mm, with a weight of approximately 850 g, including the wall bracket and external antenna.
It features 14 two-color LEDs and two buttons – a power button and a multifunction button. The internal memory can buffer up to about 100,000 measurements using non-volatile FLASH memory.
For uninterrupted operation, the device relies on 2 heavy D size alkaline batteries with a standby time of approximately 2 days at +20°C and about 8 hours at -20°C.
The base station is equipped with a 433.92 MHz radio receiver using the Nokeval Sky protocol and LoRa modulation. It has an internal antenna, operates within the license-free 433.05 – 434.79 MHz frequency range, and delivers up to 10 dBm EIRP. In open areas, it can provide coverage up to 10 km, while indoor range varies depending on configuration parameters.
Network and Power
It connects to networks through mobile LTE Cat M1, NB1, and 2G, with a micro-size SIM card. It also supports Ethernet with 10/100 Mbit/s auto-negotiation and functions as a DHCP client. The power source requires a voltage of 18 to 28 VDC with a current draw of less than 500 mA.
Software and Connectivity
The device allows for over-the-air (OTA) firmware updates and features RS485 external connector pins for Modbus RTU or Nokeval SCL protocols. Additionally, it is compatible with the Nokeval Ovaport cloud service for streamlined data management.
What is a Base Station?
A base station, in the context of wireless communication, is a central radio transceiver and control unit that serves as a hub for connecting wireless devices to a network. It plays a crucial role in facilitating communication between wireless devices and the core network infrastructure, such as the Internet or a landline telephone system.
Base stations are commonly used in cellular networks, Wi-Fi, and other wireless communication systems to provide coverage, manage calls or data traffic, and relay signals between devices and the network. They are essential for extending the reach and reliability of wireless communication services.