Previous reading is 20240320 - Ground segment - Workshop 1 - Define you OpenC3 COSMOS system

TODO: Cleanup the next note

• 20240221 - OpenC3 (Cosmos) in the cloud sending the data of Open Day ESA

In this guide I am going to show you:

• How to create a new

In the previous guide we were able to create our own OpenC3 COSMOS plugin. In this guide we will simulate telemetry using python and construct.

Define our telemetry

The telemetry has the next information:

TELEMETRY BOB STATUS BIG_ENDIAN "Telemetry description"
  # Keyword      Name  BitSize Type   ID Description
  APPEND_ID_ITEM ID    16      INT    1  "Identifier"
  APPEND_ITEM    VALUE 32      FLOAT     "Value"
  APPEND_ITEM    BOOL  8       UINT      "Boolean"
    STATE FALSE 0
    STATE TRUE 1
  APPEND_ITEM    LABEL 0       STRING    "The label to apply"

We are going to define the telemetry using python and construct. It would look something like:

from construct import Struct, Int16ub, Float32b, Bit, CString
import math

# Define BOB telemetry packet

BOB = Struct(
  "ID" / Int16ub,
  "VALUE" / Float32b,
  "BOOL" / Bit,
  "LABEL" / CString("utf8")
  )

bob_data_dict = dict(
  ID = 1,
  VALUE = 3.27,
  BOOL = 0b0,
  LABEL = "Hello world"
  )

bob_packet = BOB.build(bob_data_dict)


#%%

# Send the packet over TCP

import socket

# Create a TCP/IP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Connect the socket to the server and port
server_address = ('cosmos.insightsat.com', 8002)
sock.connect(server_address)

try:
    # Prepare the binary data
    message = bytes([3, 1, 250])

    # Send data
    print('sending {!r}'.format(bob_packet))
    sock.sendall(bob_packet)

finally:
    # Close the socket
    print('closing socket')
    sock.close()

After executing it, we would see that the server were able to process our telemetry.