As far as C19 is concerned (and C20 also I guess) , from SONOFF Assistance I got the following: "I am sorry that the Electrical Schematic is not for public. C19 is a 50V100nF" Thank you for sharing your experience. This might hel me in understanding why I burned my R3 and may be how to fix...

OK. I got the point.

I will check it at the first opportunity when I will open again the roller shutter box.

Meanwhile I think I will buy a new Dual R3 because this one is really burnt in that area and also some trucks have disappeared (blowed) around C19.

Thanks for your assistance !

There is a reason to pull both the UP and DOWN to the neutral. It will break the motor and also impose an extra force to hold position. If both lines are floating, then you can rotate the motor easier. OK, if this is the case this shall be done internally to the motor because it is supposed to be u...

I cannot see how your mistake setup may have burned the cap in the Sonoff, unless you had the neutral connected to the motor. What could go wrong is when the remote tries to pull either UP or DOWN to the neutral, then a closed relay may cause a short. This is a good point. The motor is made by two ...

Can you operate (or should you...) the motor without the remote? It is still not clear to me what signal is present on the "UP" and "DOWN" pin. YES. The motor can be operated without the remote only with push button. Indeed it was like that at the beginning. The UP and DOWN are ...

Just to avoid misunderstandings about what I wanted to do and the mnistake I have done I post a pic.

That remote output, is that intended to connect to the motor directly? If so, then you may have put a voltage differential of 230V (AC) on the S inputs. There is probably a short circuit or load detection in the remote, so it could be that the remote first tries to check if something is connected b...

WOW, you are providing a lot of very usefull information. I try to explain the mistake I made (I did not mixed neutral with phase ... at least not directly). This is what I did: I wanted to use the DUAL R3 for my bedroom shutter that is right now commanded with a remote (RT3 - https://www.telecomman...

Yes. I have opened a dedicated ticket few minutes ago.
I hope they are willing to share the schematic.
Thanks for the assistance.

Thankyou for the feedback.
I cannot find an ESP32 schematic for the Dual R3.

Just for complete the issue, I attach a pic of the C19 burnt.

I need to find the schematic in order to understand the function of C19 and its value and rated voltage.
May be I can write them ...

Hello to everybody.
I connected the subject switch but I made a mistake so that S1 and S2 are no more working (I burnt some devices).
Output are working and I would like to fix the issue by changing the burnt components.

Is there any chance to have the original schematics ?

I'm Matteo from Italy (Milan).

I'm 55 and I like playing with Domotics...