Once you have the card, the next step is to use an OTG cable to connect to your phone. It is ok to use a card that outputs HD, but make sure that it can receive 4K on the input side. What I have seen on Amazon is that you can find the cheap “brands” using the keywords USB 2.0 HDMI capture.
My guess is that you can pretty much use any capture device you want. The only difference here is that you will be pushing the signal into your phone. I tested the serial port using the same approach described above for the USB adapter.This “hack” is similar to other hacks converting cameras into webcams using capture cards. My serial port shows up in the /dev folder as ttyS0. In the Pi, the serial port might need to be enabled in the configuration settings. The setup is more compact compared to using a USB adapter. The converter has solder terminals that I connected to female header adapters, and connected to pins 4, 6, 8, and 10 on the Pi. This converter fits within a DB9 back shell. I use NulSom’s Ultra Compact RS232 to TTL Converter with Male DB9. Using an RS232-to-TTL converterĪn RS232-to-TTL converter converts RS232 voltage levels to TTL levels that can be used by the Pi (and vice versa). Typing in PuTTY on the Pi resulted in text showing up in HyperTerminal on the PC. I set up HyperTerminal for 9600 baud, N, 8, 1, and no flow control. On the PC, I used HyperTerminal (yes, I still have an old copy from the XP days). I connected the Pi to a PC’s serial port (via another USB adapter) for testing using a null modem adapter. Line discipline options -> Local Echo -> Force on.9600, 8, 1, Parity = None, Flow control = None.On the Pi, the PuTTY settings I used for testing are: To test the serial port, I installed PuTTY on my Pi using: sudo apt-get install putty (During my installation, before plugging in the USB/serial converter, this file was not in the /dev directory.) In the Pi’s /dev folder, a file with the name ttyUSB0 or similar should now be shown. I bought this on Amazon for less than $9.Īfter booting up the Raspberry Pi, plug in the cable. When using this approach, I’m using a Sabrent USB 2.0 to serial cable adapter (CB-DB9P) attached to one of the Pi’s USB ports. This post shows two ways to adapt the Raspberry Pi’s TTL serial port to a DB9 connector for use as an RS232 serial port:
Serial ports (RS-232) are still useful to me, and a Raspberry Pi is a great platform to use as a low-cost serial terminal for a packet radio terminal, serial debugger, or general serial interface.
0 kommentar(er)
