Reading data from Raspberry pi using TCP/IP block

Question

I am trying to send data to the raspberry pi using TCP/IP Send block from Simulink. Can anyone suggest how I can read data from raspberry pi and write it to the CSV format ??

Answer 1

You can try scripting a program to listen for the TCP message, and dump it to a CSV file in the same program.

For example, using python (copy-pasted with some modifications from https://wiki.python.org/moin/TcpCommunication) with socket library, you can write a program running in raspi that listens for the csv messages:

import socket


TCP_IP = '127.0.0.1'
TCP_PORT = 5005
BUFFER_SIZE = 1024

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((TCP_IP, TCP_PORT))
s.listen(1)

data_rcv = ''
conn, addr = s.accept()
print 'Connection address:', addr
while 1:
    data = conn.recv(BUFFER_SIZE)
    if not data: break
    data_rcv += data
conn.close()

with open('/path/to/csv', 'w') as csvfile:
  csvfile.write(data_rcv)

I believe python comes with Raspbian by default.