SD read

 1'''
 2SD - SD_write.py with asynchronous mode.
 3
 4This example demonstrates how to read a message from SD card from WifiDAQE3AH.
 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.WifiDAQE3AH()
31
32    ## Connect to device
33    try:
34        dev.connect("192.168.5.38")  ## 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        filename = "WPC_test.txt"
44        read_bytes = 15
45        mode = 1  ## 0 : write, 1 : read
46
47        ## Get firmware model & version
48        driver_info = await dev.Sys_getDriverInfo_async()
49        print(f"Model name: {driver_info[0]}, Firmware version: {driver_info[-1]} ")
50
51        ## Open file in sdcard
52        err = await dev.SD_openFile_async(filename, mode)
53        print(f"SD_openFile_async, status: {err}")
54
55        ## Get sdcard storage
56        storage = await dev.SD_getStorage_async()
57        print(f"SD_getStorage_async: {storage}")
58
59        ## Read data form sdcard
60        read_data = await dev.SD_readFile_async(read_bytes)
61        print(f"SD_readFile_async, data: {read_data}")
62
63        ## Close file in sdcard
64        err = await dev.SD_closeFile_async()
65        print(f"SD_closeFile_async, status: {err}")
66    except Exception as err:
67        pywpc.printGenericError(err)
68
69    finally:
70        ## Disconnect device
71        dev.disconnect()
72
73        ## Release device handle
74        dev.close()
75
76
77def main_for_spyder(*args):
78    if asyncio.get_event_loop().is_running():
79        return asyncio.create_task(main(*args)).result()
80    else:
81        return asyncio.run(main(*args))
82
83
84if __name__ == '__main__':
85    asyncio.run(main())  ## Use terminal
86    # await main()  ## Use Jupyter or IPython(>=7.0)
87    # main_for_spyder()  ## Use Spyder