Author: Sankar Cheppali

In this blog we will see how to receive a button press notification from the CC2541 keyfob. DK comes with CC2541 keyfob, CC2540 USB dongle and CC debugger.

C supports pointers to functions. Functions are not variables but you can define a pointer to a function. The function name refers to the address of the function

In this blog we will see how to connect to a MQTT broker and receive messages from the broker. We will also handle connection losses to broker and

NOTE: There are many models in SCT013 series. Some models act as voltage source and some act as current source, you need to make sure that the voltage

Johnny-five is a java script frame work which allows nodejs apps to talk to the hardware such as Arduino ,Intel Edison and Raspberry Pi. For full list of support

NodeMCU is great for connecting cloud and arduino is great at talking with different sensors. nodemcu has only one analog pin. In this blog we will see how

When ever a request is made to a data node to read a block, the data node will read the block from disk. If you know that you

We have seen here, that Avro supports three kinds of API (Generic,Specific,reflect). In this blog we will see how to use Reflect API. Reflect API is use full

Kafka is a distributed pub/sub broker which can scale horizontally. Kafka broker is designed to work in clusters , where you will run multiple Kafka brokers on different

Hadoop has many standard compression codecs available, namely DEFLATE (.deflate) ,gzip (.gz), bzip2 (.bz2) ,LZO (.lzo),LZ4 (.lz4),Snappy (.snappy) . Only bzip2 is splittable , it very important for