Troubleshooting • i2c Mux giving Errno 5

Code:

[all]dtoverlay=w1-gpiodtoverlay=i2c-mux,pca9548,addr=0x70

Code:

 i2cdetect -y 1

Code:

import smbus2import timedef read_data_from_device():    # PCA9548A multiplexer address    multiplexer_address = 0x70 #<--- same result with 0x71    device_channel = 0    device_address = 0x28    # Create an SMBus object    bus = smbus2.SMBus(1)    print(f"bus:{bus}")    try:        while True:            bus.write_byte(multiplexer_address, 1 << device_channel)            print('wrote bus')            # Read 4 bytes from the device            read_data = bus.read_i2c_block_data(device_address, 0, 4)            print('read_data', read_data)            # Group the first two bytes and last two bytes            first_two_bytes = read_data[:2]            # Display the grouped values            print(f"channel{device_channel}: {first_two_bytes}")            # Delay for 1 second            time.sleep(1)    except KeyboardInterrupt:        print("\nProgram interrupted by user.")    except Exception as e:        print(f"An error occurred: {e}")    finally:        # Close the SMBus connection        bus.close()if __name__ == "__main__":    read_data_from_device()