Py2c Prime

I2c interface in Python that is served over TCP that can connect to a multitude of different services. Primarily used for development in F'.

This process can be generalized to communicate with a Python server through a TCP socket, using Python code within F Prime.

Connecting

Py2c opens up a TCP server on port 7860 (customizable). This is not a RESTful API, rather communication of bytestreams.

Here's an example of how you could connect to a TCP server using Python:

import socket
​
#Create a TCP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect(("127.0.0.1", 7860))

while True:
​
    # Send data to server
    msg = "Message to server"
    sock.send(msg.encode('utf-8'))
​
    # Receive data from server
    data = sock.recv(1024).decode('utf-8')
    print(f"Received data: {data}")
​
    sock.close()

Utilization

While not a RESTful API, data is obtained through a hierarchical system that is defined within the string sent to the server. It comes in the form of:

[endpoint]/[data to return]

All data is returned as a string, but then must be converted to the proper type on the client side. Information about the proper types is in the following sections.

Endpoints

"test" - Ping Server

Usage: test Response: "Hello from server.py!" Resp. Type: String

"bme680" - All-in-One Ambience Sensor

--- get temperature ---

Usage: bme680/temp Response: ex. 25.84 Resp. Type: Float, degC

--- get pressure ---

Usage: bme680/pressure Response: ex. 500 Resp. Type: Float, hPa

--- get humidity ---

Usage: bme680/humidity Response: ex. 40 Resp. Type: Int, %

--- get all ---

Usage: bme680/all Response: [temp],[pressure],[humidity] Resp. Type: See above.

"rm3100" - Magnetometer

--- get X measurement ---

Usage: rm3100/x Response: ex. ### Resp. Type: Float

--- get Y measurement ---

Usage: rm3100/y Response: ex. ### Resp. Type: Float

--- get Z measurement ---

Usage: rm3100/z Response: ex. ### Resp. Type: Float

--- get all ---

Usage: rm3100/all Response: [x],[y],[z] Resp. Type: See above.