1'''
2DPOT - DPOT_writeByChannel.py with asynchronous mode.
3
4This example demonstrates how to write digital potentiometer resistance to the specefic channel from EthanP.
5-------------------------------------------------------------------------------------
6Please change correct serial number or IP and port number BEFORE you run example code.
7
8For other examples please check:
9 https://github.com/WPC-Systems-Ltd/WPC_Python_driver_release/tree/main/examples
10See README.md file to get detailed usage of this example.
11
12Copyright (c) 2022-2025 WPC Systems Ltd. All rights reserved.
13'''
14
15## WPC
16from wpcsys import pywpc
17
18## Python
19import asyncio
20import sys
21sys.path.insert(0, 'src/')
22
23
24async def main():
25 ## Get Python driver version
26 print(f'{pywpc.PKG_FULL_NAME} - Version {pywpc.__version__}')
27
28 ## Create device handle
29 dev = pywpc.EthanP()
30
31 ## Connect to device
32 try:
33 dev.connect("192.168.1.110") ## Depend on your device
34 except Exception as err:
35 pywpc.printGenericError(err)
36 ## Release device handle
37 dev.close()
38 return
39
40 try:
41 ## Parameters setting
42 port = 0 ## Depend on your device
43 channel = 0
44 resistance_ratio = 0.5
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 DPOT
51 err = await dev.DPOT_open_async(port)
52 print(f"DPOT_open_async in port {port}, status: {err}")
53
54 ## Write on the channel
55 err = await dev.DPOT_writeByChannel_async(port, channel, resistance_ratio)
56 print(f"DPOT_writeByChannel_async in port {port} channel {channel}, status: {err}")
57
58 ## Close DPOT
59 err = await dev.DPOT_close_async(port)
60 print(f"DPOT_close_async in port {port}, status: {err}")
61
62 except Exception as err:
63 pywpc.printGenericError(err)
64
65 finally:
66 ## Disconnect device
67 dev.disconnect()
68
69 ## Release device handle
70 dev.close()
71
72
73def main_for_spyder(*args):
74 if asyncio.get_event_loop().is_running():
75 return asyncio.create_task(main(*args)).result()
76 else:
77 return asyncio.run(main(*args))
78
79
80if __name__ == '__main__':
81 asyncio.run(main()) ## Use terminal
82 # await main() ## Use Jupyter or IPython(>=7.0)
83 # main_for_spyder() ## Use Spyder