Wiring for 2nd Register

[annujbhatia]

Hi, my module works with 8 relays but when i try to expand to 16 relays i have an issue. The 2nd register heats up and the pro mini keep restarting / re-initializing. I think i have the wrong connections for the 2nd register. Can anyone help / share what the wiring for the 2nd register should be?

[mfalkvidd]

Locking this thread to avoid double work. If anyone can help, please post in https://forum.mysensors.org/post/90962 instead.