1'''
2DPOT - DPOT_readByChannel.py with asynchronous mode.
3
4This example demonstrates how to read digital potentiometer resistance by 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
44 ## Get firmware model & version
45 driver_info = await dev.Sys_getDriverInfo_async()
46 print(f"Model name: {driver_info[0]}, Firmware version: {driver_info[-1]} ")
47
48 ## Open DPOT
49 err = await dev.DPOT_open_async(port)
50 print(f"DPOT_open_async in port {port}, status: {err}")
51
52 ## Read all channels by for loop
53 for i in range(4):
54 resistance_ratio = await dev.DPOT_readByChannel_async(i)
55 print(f"resistance_ratio in channel {i}: {resistance_ratio}")
56
57 ## Close DPOT
58 err = await dev.DPOT_close_async(port)
59 print(f"DPOT_close_async in port {port}, status: {err}")
60
61 except Exception as err:
62 pywpc.printGenericError(err)
63
64 finally:
65 ## Disconnect device
66 dev.disconnect()
67
68 ## Release device handle
69 dev.close()
70
71
72def main_for_spyder(*args):
73 if asyncio.get_event_loop().is_running():
74 return asyncio.create_task(main(*args)).result()
75 else:
76 return asyncio.run(main(*args))
77
78
79if __name__ == '__main__':
80 asyncio.run(main()) ## Use terminal
81 # await main() ## Use Jupyter or IPython(>=7.0)
82 # main_for_spyder() ## Use Spyder