Mini project

Question 1

Why use Enhanched ShockBurst?

Answer 1

Suitable for ultra low power wireless applications.
The system cost is reduced by handling high speed link layer operations.
It has automatic packet handling, and auto transaction handling; There are auto acknowledgement with payload, and auto retransmission.

Question 2

How does ShockBurst check received packets?

Answer 2

Check the PID (packet identification) if it is the same as last packet. If they have the same PID, then CRC (Cyclic redundancy check) will be compared to the last packet, to see if the packet is new, or it is retransmitted. If the PID and/or CRC is not the same, they will be considered as a new packet.

Question 3

Discuss the use of a photoresistor

Answer 3

It is very very cheap, and does its purpose in this project. It is not very precise as a lux meter or lux sensor though.

Question 4

Discuss the use of the PIR sensor

Answer 4

Will sense 110 degrees of movement, and can messure up to about 7 meters. Will return either high or low.