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mikee123 April 30th, 2018 05:02 AM

Problem controlling Somfy RTS with 2 RFXcom
I have 2 RFXtrx, one of them paired to a Somfy RTS blind. Thats working fine. As that Rfxtrx is on a unreliable USB over ethernet, I thought I switch transmitters on the device to the other Rfxtrx (obviously left the code unchanged). But it does not respond when I try to control it. Do I have to pair it to the second Rfxtrx even though it has the same code ?

b_weijenberg April 30th, 2018 05:18 AM

You need to pair each RFXtrx433E with a different ID-Unit Code to the Somfy motor.

The reason is that the rolling code for each ID-Unit Code is stored in the RFXtrx433E.
If you use another RFXtrx433E with the same ID-Unit code the rolling will not match and the motor will not respond.

mikee123 April 30th, 2018 05:32 AM

Ok that makes sense. But I cannot use the same code to pair to the second Rfxtrx, I have to give it a different one ? Then I could easily switch transmitters if needed

b_weijenberg April 30th, 2018 05:57 AM

Yes, you have to use a different code.

The Somfy motor can have a few remotes paired. Each Somfy remote has a different ID.
The RFXtrx433E act as a Somfy Telis4 remote.
The motor has an internal table for each paired remote with: ID, unit code, rolling code.

For that reason you cannot use the same ID, unit code in a different RFXtrx433E.

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