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RS232 serial signal input via 3.5mm audio port of android ...
https://stackoverflow.com/questions/19383890/rs232-serial-signal-input-via-3-5mm-audio-port-of-android-smartphone-android-de
I have a device, which gives me an output of essentially just a RS232 serial signal (1200 baud, 8 databits, no parity bits, one stop bit). This output comes in to my android phone via the 3.5mm audio jack. I want to store every data bit into a variable, display or calculate something and when the next bits come in, it should override the variable. I know exactly what to do with it …
Serial Communication RS232 - Apps on Google Play
https://play.google.com/store/apps/details?id=co.com.serialCommunicationRS232&hl=en_US&gl=US
Serial Communication RS232. john marin Tools. Everyone. Contains Ads. Add to Wishlist. Serial communication to connect your android phone that supports OTG externally by arduino example mediantes or other devices which can establish a serial connection and are compatible with the operating system android devices. Read more.
serial port - Android RS232 through headphone jack ...
https://stackoverflow.com/questions/23917249/android-rs232-through-headphone-jack
OR, in a much simplified version, you can send out TONES then some PLLs (Phase Locked Loop) react to specific frequencies (well, Arduino can act as an advanced PLL). 1 PLL is enough, since you want to react to 1s only, and the rest is 0s. – Phantômaxx May 28 '14 at 18:27 Add a comment
Audio port (headphone) jack and RS232 | B4X …
https://www.b4x.com/android/forum/threads/audio-port-headphone-jack-and-rs232.20692/
Audio RS232 Yes, i have created a library that does that exactly, since the audio jack is Stereo, you can use left channel as one RS232 port and the right channel as a second RS232 Port. check out the library here You will have to build the circuit in order to translate the output signal to TTL level, just follow the thread above.
What is RS-232 Control Protocol?
https://cie-group.com/how-to-av/videos-and-blogs/what-is-rs232-protocol
Significantly in the AV industry, RS-232 does not transmit audio and video signals, but is used specifically for control of devices in an AV system; so source devices such as some BluRay players and digital media players, display devices such as televisions and projectors, as well as signal control products such as signal splitters and matrices.
Android Audio-serial Connection | Hackaday
https://hackaday.com/2010/02/01/android-audio-serial-connection/
Android Audio-serial Connection. This seems like something of a throwback hack. [WilinNeofoxx] has built an audio modem interface for use with his Android phone. A program running on the Android ...
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