Nokeval Cell2-Sky-Link-RS485-LTE/LAN User manual

ID11200 V31 24.9.2021
Firmware versions 1.0-1.0
Cell2-Sky-Link-RS485-LTE/LAN
User Manual

2
Table of contents
Introduction ....................................................................................................................................................4
Serial interface ............................................................................................................................................4
Sky radio......................................................................................................................................................4
Installation ......................................................................................................................................................5
Wall holder ..................................................................................................................................................5
Installation location....................................................................................................................................5
Connections ................................................................................................................................................6
Power supply & serial RS-485 connector ...............................................................................................6
Micro-SIM.................................................................................................................................................7
Cellular network LED...............................................................................................................................7
RS-485......................................................................................................................................................7
RS-485 bus information ..........................................................................................................................7
Backup battery case and POL connector...............................................................................................8
Configuring the device....................................................................................................................................9
Connection settings ................................................................................................................................9
Programming connector.........................................................................................................................9
Conf menu ...................................................................................................................................................9
Time settings...........................................................................................................................................9
Serial settings..........................................................................................................................................9
Network .................................................................................................................................................16
Nokeval Sky settings.............................................................................................................................17
Buzzer ....................................................................................................................................................18
Info.........................................................................................................................................................19
Mon menu..................................................................................................................................................19
Cal menu....................................................................................................................................................20
Usage.............................................................................................................................................................21
LEDs ...........................................................................................................................................................21
2G/4G .....................................................................................................................................................21
LAN.........................................................................................................................................................21
Uplink.....................................................................................................................................................21
Mem .......................................................................................................................................................21
Sky .........................................................................................................................................................22
RS485.....................................................................................................................................................22
FOTA.......................................................................................................................................................22
Batt ........................................................................................................................................................22
Power.....................................................................................................................................................22

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Multifunction button ...........................................................................................................................22
Status information....................................................................................................................................22
Maintenance..................................................................................................................................................24
Cleaning.....................................................................................................................................................24
Service .......................................................................................................................................................24
Troubleshooting............................................................................................................................................25
Specifications................................................................................................................................................26
Environment..........................................................................................................................................26
Measurements.......................................................................................................................................26
User interface ........................................................................................................................................26
Internal memory for buffered results...................................................................................................26
Backup batteries ...................................................................................................................................26
433.92 MHz radio transceiver (Sky) ......................................................................................................26
Network connection, depending on the device type...........................................................................26
Power supply.........................................................................................................................................26
Other......................................................................................................................................................27
Cloud connection..................................................................................................................................27
Warnings........................................................................................................................................................28
Open-Source Software Notice......................................................................................................................29
Trademarks ...................................................................................................................................................32
Manufacturer.................................................................................................................................................32

4
Introduction
Cell2-Sky-Link-RS485-LTE and Cell2-Sky-Link-RS485-LAN are base stations for Nokeval’s 433.92MHz
Sky-transmitters and are part of Nokeval Sky product families. They receive and buffer radio packets to
non-volatile memory and transmit them over cellular mobile data networks (LTE model) or local area
networks (LAN model) to Nokeval’s cloud data collections services, like Ovaport, thus enabling reliable
remote data acquisition from the field, straight to the cloud. The base station’s reliability is increased
by the backup batteries, which enable uninterrupted data acquisition also during external power
interruptions.
Serial interface
The base station can also be connected to standard Modbus RTU transmitters and to Nokeval
devices with SCL protocol using the integrated RS485 bus master.
Sky radio
Nokeval’s third generation Sky radio devices use the Semtech’s LoRa modulation technology on the
European license-free 433 MHz ISM band that allows unforeseen wireless range for battery powered
transmitters. The protocol used is defined by Nokeval, called Sky, which means that these devices are
not compatible with the LoRaWAN infrastructure.
The modulation has some parameters to define its operation. With the “maximal” settings, a very long
range can be reached, but at the expense of higher battery and radio band consumption. One radio
transmission can last approx. 2 seconds (compared to 20 ms of the Nokeval MTR series). This means
that the number of transmitters within the range must be limited to avoid collisions and to allow radio
time for each. It is not practical to use a short interval between transmissions; 10 to 30 minutes is the
recommended interval range.
When the maximal range is not necessary, the parameters should be adjusted for lower battery and
band consumption. All the devices within one network must share the parameters, because the
receiver can only listen with one set of parameters at a time. Consequently, the parameters must be
selected according to the most distant device. It is also possible to adjust the transmission power. The
devices that are closer to the receiver can use a lower power setting.
Before using these 433 MHz radio devices, make sure it is legal in your country.

5
Installation
Wall holder
Install the base station to a wall or some other suitable surface with the separate wall holder. See the
following dimensional drawing for the wall holder’s mounting hole distances. Use fastening accessories
suitable for the wall material, like plugs and screws. The screws need to have a countersunk head.
Installation location
Choose an installation location that is central in relation to the radio transmitters.
The base station must be installed vertically. The base station is splash waterproof, but the location
must be chosen so that the unit will not be exposed to water or hot steam. Please note that the AC
socket and the power supply are not splash waterproof.
The location must have LTE/GSM/GPRS network coverage for the LTE model. This can be verified before
the final installation steps by powering on the base station and checking the signal strength indicator
LEDs (see page 21). Installation location must have one free AC socket for the power supply.