apt update && apt upgrade -y  
apt install python3-pip  
pip3 install CoAPthon3  

1. Post.py: can be used to post requests to the local server
python3 post.py 'hello'

2. coap_post.py: can be used to post requests to any coap server
python3 coap_post.py

3. coap_server.py: used to startup the local server listenining to a resource. Default listening resource is 'big'
python3 coap_server.py

4. response.py: this issues a get request to the local server to obtain any post sent to it
python3 response.py

5. light_response.py: this should run on the raspberry pi. it send instructions to turn the led light on or off when a post request is issued.
python3 light_response.py