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