I did the same thing as did Speedracer did here, in addition to that I also connected the output the of rf board to gpio 3 on the d1 mini. This way down the road I can use the d1 mini to decode the rf signal and remove the chime from the equation.
Ok I did the same but I also wired the output of the receiver into pin 3 of the d1 mini. This way I can actually add a 433 library and allow the wemos to eventually detect the signal and not rely on the code hopping chip.
Interesting, when I try your method I don't get any output when pushing the bell button. I see my accurite temp sensor posting updates but not the bell.