47 lines
1.5 KiB
Markdown
47 lines
1.5 KiB
Markdown
# Circuitpython as Client
|
|
|
|
This example demonstrates the use of Socket as a client, accessing a server on a host development machine. This Circuitpython sketch uses the Connect, Send, and Recv_Into methods.
|
|
|
|
## Prerequisites
|
|
|
|
Circuitpython V6.2.0 minimum. Neither the host or client sketch has installed module prerequisites.
|
|
|
|
## Setup
|
|
|
|
Find a viable IP address for the host machine first and insert it in both sketches as HOST. On mac, this can be done by going to System Preferences/Network and checking the IP address used to connect to the local wireless network. Make sure that both devices are using the same WIFI!
|
|
|
|
Each sketch can have Timeout values changed. The host sketch usually needs a value above 0, or the recv() will fail. Currently, Circuitpython's Connect function is always blocking, so changing the client timeout will not cause much change in behavior.
|
|
|
|
Start the Server on the host PC first, within this folder:
|
|
|
|
```
|
|
python host-server.py
|
|
```
|
|
|
|
Then, reload the client sketch in Circuitpython.
|
|
|
|
## Expected Behavior
|
|
|
|
The example should connect to a server running on the host machine. The client will send a "Hello world" string to the server, which will return it.
|
|
|
|
Expected client output:
|
|
|
|
```
|
|
Connecting to wifi
|
|
Creating Socket
|
|
Connecting
|
|
Sending
|
|
Receiving
|
|
bytearray(b'Hello, world')
|
|
```
|
|
|
|
Expected Server output (IP/port values will vary):
|
|
|
|
```
|
|
Create Socket
|
|
Accepting connections
|
|
Connected by ('192.168.10.128', 64509)
|
|
got: b'Hello, world'
|
|
sent: b'Hello, world'
|
|
```
|