Elcom BFT-210 Nuki Opener working with hardware mod

[onepunchdenno (Dennis)]

@onepunchdenno

Ring:

Thats super simple, you just install the RSR 210 and Get the BUS+ signal to one of the K terminals and your yellow Ring wire to the other one to and easy peasy you get a ring signal.

Open the door:

Here it got tricky, so the touch sensitive plate and the button of the BHT differ how they are working. the other hacks just add a the nuki contact and bridge the button with the NUKI itself. thats not possible with the BFT210 because of the SSD relai working function, you always would get creeping capacity within the system therefore you need a real physical disconection of the Button. The button works more or less like so. A capacitor charges the plate and your physical touch decharges it, that drop is then reconized by the system as “touch”

The Hack:

first struggle i had to find a connection point of the Corresponding touch plate. after i found that i needed a point to ground it too so same same as the BHT but differnt as before because as i explained above the nuki on connection on these buttons wouldnt work because they would “short it” so you need to install an additional relai in that connection and thats triggered with the nuki to discharge the capacitor against ground.

ahhh okay, now it clicked. Sorry though you were circumventing the RSR but using it like so should work jep. but it also works if you would use the solder points on the backside of the board like i did and not physically disconnect the speaker itself. find the corresponding button on the front and “press it” with the relay

[oasisliving (Hannes)]

Hi Dennis,

do you happen to be from near Munich?

Kommst du zufälligerweise aus der Nähe von München?

Stehe vor dem selben Problem und will die Umrüstung/Hack.

Best regards Hannes

[Daniel_H]

How did you manage to solder the white wire to the tiny soldering point?

[shexbeer]

Thats real issue with this solution. I bought a second BFT-210 and tried to solder it. Got a connection, but when installing all those cables in this tiny housing pad broke off from board and now i cannot try again.

I would really love to smart up my BFT-210 but buying another one i wont do. Is there any other solution of getting contact with this small point?

[spyonical (Patrick)]

Thank you for your Hardware hack. How did you configure the opener in the App? Generic Bus or Generic analog?

[David_Himmelstoss]

Hey Dennis,

Do you still have a spare PCB? If so, how much would you want for it, including shipping to Munich?

Cheers,

David