Monthly Archives: September 2014

PL2303 Prolific USB to TTL Driver for Windows 8.1

After plugging in the USB to TTL (3.3V) to the PC with Windows 8.1 in order to connect to the Raspberry Pi according to the lesson in Adafruit Window 8.1 does not seem to have appropriate driver for the device but I manage to get it working using the following steps:

1. Download the driver Profilic_Win8_x64_x86 and extract it
2. Open Device Manager3. Expand Ports (COM & LPT) 
4. Right click device name Prolifc USB-to-Serial Comm Port and select Property
5. Select Driver tab
6. Click Update Driver
7. Choose Browse my computer for driver software
8. Choose Let me pick from a list of device drivers on my computer
9. Click Have Disk
10. Choose the folder that you extracted from the downloaded zip file.
11. Choose file "ser2pl.inf" and click Open
12. Click OK
13. After successfully installed restart your PC.




Enable Telnet on Mac OS X Mavericks

Telnet is a network protocol and a network application that provides bidirectional interactive text-oriented communication between two endpoints. One endpoint acts as a server and another acts as a client. You can use Telnet client on Mac OS X by running telnet command in the Terminal followed by ip address or domain name of the server:

anand$ telnet localhost

However, if you need to make your Mac OS X (Mavericks) to run as a Telnet server you can enable it from the Terminal via launchctl command. You can follow the following steps:

anand$ sudo launchctl
launchd% load -F /System/Library/LaunchDaemons/telnet.plist 
launchd% exit

Now you can try using Telnet client to your Mac. For example, you can use telnet command on the Terminal to access the Telnet server on your Mac:

anand$ telnet localhost
Trying ::1...
Connected to localhost.
Escape character is '^]'.

Now you can provide log in information to gain access to your Mac via Telnet!!.

Note that Telnet is a plain text-based application without any encryption and it is not secure. You may want to use SSH instead if you want to do remote management of your Mac.

This technique should also work with Mac OS X Lion as stated in this post