Relay set channel

 1'''
 2Relay - Relay_set_channel.py with asynchronous mode.
 3
 4This example demonstrates how to write channel from EthanL.
 5
 6-------------------------------------------------------------------------------------
 7Please change correct serial number or IP and port number BEFORE you run example code.
 8
 9For other examples please check:
10    https://github.com/WPC-Systems-Ltd/WPC_Python_driver_release/tree/main/examples
11See README.md file to get detailed usage of this example.
12
13Copyright (c) 2022-2025 WPC Systems Ltd. All rights reserved.
14'''
15
16## WPC
17from wpcsys import pywpc
18
19## Python
20import asyncio
21import sys
22sys.path.insert(0, 'src/')
23
24
25async def main():
26    ## Get Python driver version
27    print(f'{pywpc.PKG_FULL_NAME} - Version {pywpc.__version__}')
28
29    ## Create device handle
30    dev = pywpc.EthanL()
31
32    ## Connect to device
33    try:
34        dev.connect("192.168.1.110")  ## Depend on your device
35    except Exception as err:
36        pywpc.printGenericError(err)
37        ## Release device handle
38        dev.close()
39        return
40
41    try:
42        ## Parameters setting
43        port = 0  ## Depend on your device
44        DO_port = 0
45
46        ## Get firmware model & version
47        driver_info = await dev.Sys_getDriverInfo_async()
48        print(f"Model name: {driver_info[0]}, Firmware version: {driver_info[-1]} ")
49
50        ## Open relay
51        err = await dev.Relay_open_async(port)
52        print(f"Relay_open_async in port {port}, status: {err}")
53
54        ## Toggle digital state for 10 times. Each times delay for 0.5 second
55        for i in range(10):
56            if i % 2 == 0:
57                value = [0, 0, 0, 0, 0, 0]
58            else:
59                value = [1, 1, 1, 1, 1, 1]
60
61            await dev.DO_writePort_async(DO_port, value)
62            print(f'Port: {DO_port}, digital state= {value}')
63
64            ## Wait
65            await asyncio.sleep(0.5)   ## delay [sec]
66
67        ## Close relay
68        err = await dev.Relay_close_async(port)
69        print(f"Relay_close_async in port {port}, status: {err}")
70    except Exception as err:
71        pywpc.printGenericError(err)
72
73    finally:
74        ## Disconnect device
75        dev.disconnect()
76
77        ## Release device handle
78        dev.close()
79
80
81def main_for_spyder(*args):
82    if asyncio.get_event_loop().is_running():
83        return asyncio.create_task(main(*args)).result()
84    else:
85        return asyncio.run(main(*args))
86
87
88if __name__ == '__main__':
89    asyncio.run(main())  ## Use terminal
90    # await main()  ## Use Jupyter or IPython(>=7.0)
91    # main_for_spyder()  ## Use Spyder