30 May '13, 5pm

Giving the Nexus 4 a serial port

Giving the Nexus 4 a serial port

Having a serial port on any Linux box is always useful, but with the tiny computers we’re carrying around in our pockets now, that isn’t always an option. Some of the more advanced phones out there break out a UART on their USB OTG port, but the designers of the Nexus 4 decided to do things differently. They chose to put the Nexus 4′s serial port on the mic and headphone input, and [Ryan] and [Josh] figured out how to access this port . Basically, the Nexus 4 has a tiny bit of circuitry attached to the microphone input. If the Nexus detects more than 2.8 Volts on the mic, it switches over to a hardware UART, allowing everything from an Arduino to an old dumb terminal to access the port. The guys used a USB to serial FTDI board wired up to a 3.5 mm jack with a few resistors to enable the hardware UART on their phone. With a small enclosure, they had a reasonably inexpensive...

Full article: http://hackaday.com/2013/05/30/giving-the-nexus-4-a-seria...

Tweets

HTC One with pure Nexus experience announced

HTC One with pure Nexus experience announced

soyacincau.com 31 May '13, 2am

Since this is a “Sense”-less device, you’ll probably lose out the fancy HTC Zoe camera features, BlinkFeed and IR Blaster ...

Four Companies with Unique Employee Giving Programs

Four Companies with Unique Employee Giving Prog...

triplepundit.com 31 May '13, 12pm

By Adam Weinger, President of Double the Donation As more and more companies adopt corporate giving programs , it’s gettin...