FAQ

Can we use our own SIM for the NB-IoT version?

Yes, you can use your own NB-IoT/LTE-M SIM card. However, you have to think about running your own backend infrastructure. Alternatively, you can use a HARDWARIO SIM card or SIM chip in conjunction with HARDWARIO Cloud and the integration of the device with your service is done via REST API or via callback (webhook).

Which LoRaWAN networks does CHESTER support?

CHESTER supports private LoRaWAN networks (e.g. built by our EMBER platform) as well as networks operated by LoRaWAN operators (CRA, Starnet, TTN, etc.).

How do I access the data that CHESTER sends?

If you use the services of our HARDWARIO cloud, we will make the API available to you - https://api.hardwario.cloud/ and help you integrate it with your systems. We can also get you up and running with data visualization built on our servers and Grafana application. If you are interested in a custom application, we can connect you with our partner, eMan.

Which external devices can be connected to the CHESTER?

The external devices are connected via CHESTER-X extensions directly to the CHESTER-M motherboard or an additional module in the box lid. We are able to quickly add additional expansion modules as required. You can currently find an overview of the extensions CHESTER product page.

How are Modbus peripherals connected to CHESTER?

The condition is that the peripheral provides the Modbus RTU communication protocol via RS-485 interface. Another important condition is that the CHESTER must behave as MASTER and the peripheral as SLAVE. For integration we need the peripheral specification (datasheet), in particular a table of Modbus registers to be read together with the read interval specification. We will modify the CHESTER firmware for your application according to this data.

Can I sense pulses with CHESTER (dry contact)?

Yes, CHESTER will be complemented by the CHESTER-X0 module and you can set the configurable input as desired.

How long does the CHESTER run on battery power?

CHESTER is designed as a very low power consumption device. It is powered by a LiSoCl2 lithium primary cell with a nominal voltage of 3.6 V. This type of battery spontaneously loses only 3% of its capacity per year. By economical metering and communication setup, we can ensure a lifetime of several years. The run time for your specific application depends on the frequency of reading and sending data. Using external CHESTER-B battery modules, the capacity can be increased several times.

How do I find out if the installation site is covered by the LPWAN signal?

Preferably by asking the operator of the network in question. CHESTER is also offered as an CHESTER Signal to test NB-IoT/LTE-M signal quality. To reduce the risk of the purchased device not being functional at the point of installation, we offer a 100 day testing period with a money back guarantee.

What frequencies (LTE bands) does CHESTER support?

CHESTER supports LTE bands B1-B5, B8, B12-B14, B17-B20, B25-B26, B28 and B66.

Je možné připojit CHESTER k relé pomocí digitálního výstupu (DO)?

Ano, nabízíme rozšiřující modul CHESTER-X9, který dokáže ovládat až 4 relé. Alternativně lze CHESTER spojit s RS-485/Modbus reléovým modulem a ovládat výrazně vyšší počet výstupů. Pro nabídku konkrétního řešení potřebujeme specifikaci požadovaného výstupu (např. chcete spínat relé 230 VAC / 16A nebo požadujete spínač typu otevřený kolektor).