[Pi IoT] Smart Competition Home #4: Smarthome II - Sensors Node & other clients

RE: [Pi IoT] Smart Competition Home #4: Smarthome II - Sensors Node & other clients

element14Dave — Tue, 09 Aug 2016 19:41:24 GMT

Hello [mention:03e2f3aa764e41fc9902b1084cab3232:e9ed411860ed4f2ba0265705b8793d05]

This is a fantastic and very detailed blog post! How about an update on your progress? We'd love to see how things are shaping up. Let us know how we can help!

Dave

RE: [Pi IoT] Smart Competition Home #4: Smarthome II - Sensors Node & other clients

clem57 — Thu, 28 Jul 2016 11:32:44 GMT

Long post but full of detail. Curiously what is your next step?

Love the project!

Clem

RE: [Pi IoT] Smart Competition Home #4: Smarthome II - Sensors Node & other clients

mg.sergio — Thu, 14 Jul 2016 12:07:52 GMT

Hi Caterina, great and detailed update! Hope to see more how you implement the app on the mobile phone that can control the system besides monitoring it, it will be a cool feature.

I am reviewing the schematics for the door switch and I am not sure about the connections. When the door sensor is closed, I agree the GPIO pin will be forced to GND and you can easily manage the input in the RPI. When the door sensor is open however, you will just have VDD -> Resistor -> GPIO + LED -> GND. The GPIO pin will detect the voltage at the LED, which will be around 0.7v

This means that the pin input will vary between 0v and 0.7v, since the RPI pins are digital only, most probably both inputs will be understood as a logic 0 and you will not be able to correctly detect the status of the door...