Android wired connection
Posted: Wed Aug 21, 2019 5:03 pm
Hi, I am wondering if there is any way to make a connection from an Android device using a USB OTG (on the go) cable to connect to any kind of device by physical cable, that can be sent on demand?
I am not really bothered whether the connection contains meaningful data or not, but that would be an advantage, I suppose. I really just need a signal that can be generated on the Android tablet that can trigger a device to receive a signal. I am open to what sort of device is needed for the receiver - it is a little complicated to explain but in essence can be thought of as a door keypad. Touch the right code on the Android and the USB OTG cable can deliver a signal that can be received and interpreted to open a door lock. This can be as simple as sending a voltage high on the power lines wired directly to a dumb relay, or as complicated as sending the signal with a data payload to a computer (or Arduino, or Raspbi Pi or whatever) for analysis/logging/processing/deciding whether to open the door or not. I just need something generated on the Android tablet (Nexus 9) to be detectable by whatever receiver I need to detect it. Is there any way I can achieve this?
I am not really bothered whether the connection contains meaningful data or not, but that would be an advantage, I suppose. I really just need a signal that can be generated on the Android tablet that can trigger a device to receive a signal. I am open to what sort of device is needed for the receiver - it is a little complicated to explain but in essence can be thought of as a door keypad. Touch the right code on the Android and the USB OTG cable can deliver a signal that can be received and interpreted to open a door lock. This can be as simple as sending a voltage high on the power lines wired directly to a dumb relay, or as complicated as sending the signal with a data payload to a computer (or Arduino, or Raspbi Pi or whatever) for analysis/logging/processing/deciding whether to open the door or not. I just need something generated on the Android tablet (Nexus 9) to be detectable by whatever receiver I need to detect it. Is there any way I can achieve this?