Interfacing The SSD1306 OLED Display To OrangePi

I recently purchased an 0.96 Inch 4Pin IIC I2C OLED Display Module and needed to interface it to my OrangePi.  It uses the SSD1306 chipset and can be updated via I2C interface.

SSD1306 Datasheet.

I modified a Python library built for RaspberryPi so it would work with the OrangePi I2C ports.

You can checkout the library here: https://github.com/nukem/ssd1306

You can buy the OLED Display here: https://goo.gl/coVB5o

How To Setup A Free Proxy Server Using Amazon Services CentOS

Tinyproxy is a small and fast HTTP/HTTPS proxy server daemon.

Open Amazon Web Services (AWS) Account

Register for a free AWS account. You will need a valid credit card to register. The free tier allows you to use their services free (limited) for up to 12months.

Create an EC2 Instance. Here's a great tutorial on how to do it. It includes how to connect to it via SSH.

Install tinyproxy

Connect to your instance via SSH and issue the following command:


yum -y install tinyproxy --enablerepo=epel

Configure tinyproxy

You must allow your IP to connect to the server

sudo vim /etc/tinyproxy/tinyproxy.conf

Allow XXX.XXX.XXX.XXX #Your public IP address

Then we need to make sure it runs even on restart.
sudo chkconfig tinyproxy on
sudo service tinyproxy start

Need proxy? Lowest priced starting at $0.71/proxy. Insane!

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UNIX time to human readable

You can easily convert a UNIX time to human readable using the shell command date.



$ date -d @1212312323
Sun Jun 1 13:25:23 GST 2008


RPM for Everybody

1. Listing content of an RPM file:

rpm -qpl package-version.rpm

2. Unpacking of an RPM archive:

rpm2cpio < myfile.rpm | cpio -i --make-directories

all contents of the RPM package will be extracted into the current directory creating relative path..

3. Installing an RPM package.

rpm -ivh package-version.rpm

4. Upgradinga an RPM package.

rpm -Uvh package-version.rpm

5. Listing installed packaged on your system:

rpm -qai

This will list all packages installed via the RPM system.

6. Uninstalling RPM packages:

rpm -e package-version.rpm

7. Building RPM from source:

@todo

Determining BIND version using dig

Here's a simple way to query a nameserver what version of BIND it is running.


# dig @yns1.yahoo.com version.bind chaos txt

; <<>> DiG 9.2.4 <<>> @yns1.yahoo.com version.bind chaos txt
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31576 ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;version.bind. CH TXT ;; ANSWER SECTION: version.bind. 0 CH TXT "9.2.3" ;; Query time: 238 msec ;; SERVER: 66.218.71.205#53(66.218.71.205) ;; WHEN: Sat Feb 24 19:10:14 2007 ;; MSG SIZE rcvd: 48 #