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SonOff basic v2 firmware 3.3.0 and 4ch pro r2 3.1.0

My sonoff basic v2 has fw 3.0.1, I'm using it as dry contact (I edit it).
I cannot find any changelog for new firmware, why have I to update it?

Same for 4CH pro r2 and its firmware 3.1.0, no changelog :(

Which new feature were added to new firmware?


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You are right, I updated my 4CH pro R2 with v3.1.0 and now it is not working anymore if no WiFi connection is active. (I'm using as irrigation board without WiFi connection)

I'm very upset for this

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