Any ideas on the best way to take this door keypad system as a trigger input into the Gateway? I'd like to do various things like turn lights on and trigger the security DVR system. The keypad is 12vdc so I basically have a 12vdc and NO Gnd output that I need to trigger the Gateway.
(https://lh3.googleusercontent.com/IY5N2pfU3KK2Uk-YLO4WmUlI0575LvGniI2ZFjBH9sMFwuLy6zgrRAlwzaSjoeoumM6VU61u-r5AsPqxWzPODdS9GgU0qI2fCuzoUCTc_FIHdVGFgihTb3r8p_c4ZenrN-JUjDZv_3lznbKBVpSlS-Lh5comDENQLKj7Py6Kqm8zEASsRbFzeqBvYX6UpQD_1Egm2uNMv7OOxN29xZP2F7oQ2sqTwSn0mEWL2ISSt0GVfERJa87fFMXxBZSXd1ZnGrU-ARLRhTfgXRKEOG0ea74_e8ggqyuPdWube_REQV2L8LVdq9Cag2--qsBYndnQkycd5eQ_gcbYpUXlbHaUcXpFikocMSQQvtZQe8rlRpPqVaVbf37KUVDwGeHiqFFEfwYPHPBR2kYHQN_QH5qt0ay6aLQa3wbzsCqS8umCAhHo5Oh62BkfU33JfmUtoS70cuITmiK5QdGYLB8pq0CsHmGXPaZQfF01u1zsBRUBqxs2iuCtGPl4uXNCQX4wSgC1WcDTyH37572CSGAbNhT5HjrWxzt-Vhk1DxveLWQCTuFLPANswy_nFmvHBKA_jeTUswdf=w622-h404-no) <-- Oops, image not showing. Why do I always have such a hard time with Google Photos. They are usually so easy with everything.
(http://www.emxinc.com/images/KP100_2.jpg)
Thanks for any ideas.
From the schematic it looks like this is a 12V active low interface. Ie you get your GND when the outputs are asserted.
Should be pretty straight forward to get these hooked up to digital pins through some optoisolators.