How are computed the different Ewon cellular signal strength indicators?

In an Ewon, you have multiple cellular signal level indications : The raw RSSi (0 to 30), the 3 Bars/LEDs on the extension card and the 5 bars icon in the summary page.

This article explains how these different signal values are used in the Ewon web interface.

APPLICABLE PRODUCTS

Ewon : Flexy
Ewon : Cosy

IN THIS ARTICLE

The received value varies from 0 to 99 and corresponds to a certain dBm level.

This value is stored into an "estat" variable ("INF" parameter type in BASIC Script)

or in the SYS Tag "GSM_LVL" (IOServer "Ewon").

You will also find into the Ewon Cosy/Flexy interface some bars indicators :

Or a 3 LEDs signal indication on the Cellular extension card :

Here is how these two status are computed using the RSSI raw value.

First we convert the 0 to 99 RSSI value into a "GSM_Bars" (See in "estat") value using the following logic :

Then, the Web 5 bars indicator and the 3 Bars LEDs card indicator are computed.