New USB passthough question

btw here is the pyhon code that works locally

import customtkinter as ctk
import ftd2xx
import os

RELAY_COUNT = 8
LABEL_FILE = "relay_labels.txt"

relay_labels = []
relay_states = [False] * RELAY_COUNT
buttons = []
ftdi = None

def load_labels():
labels = [f"Relay {i+1}" for i in range(RELAY_COUNT)]
if os.path.exists(LABEL_FILE):
with open(LABEL_FILE, "r") as f:
lines = f.readlines()
for i in range(min(RELAY_COUNT, len(lines))):
clean = lines[i].****()
if clean:
labels[i] = clean
return labels

def connect_ftdi():
global ftdi
try:
ftdi = ftd2xx.open(0)
ftdi.setBitMode(0xFF, 0x01)
status_label.configure(text="Connected to FTDI relay board")
turn_all_off()
for btn in buttons:
btn.configure(state="normal")
except Exception as e:
status_label.configure(text=f"FTDI connection failed: {e}")
for btn in buttons:
btn.configure(state="disabled")

def update_relay_outputs():
if ftdi:
mask = 0x00 # All OFF
for i, state in enumerate(relay_states):
if state:
mask |= (1 << i) # HIGH = ON
else:
mask &= ~(1 << i) # LOW = OFF
ftdi.write(bytes([mask]))

def make_toggle(relay_id):
def toggle():
for i in range(RELAY_COUNT):
relay_states[i] = (i == relay_id - 1)
buttons[i].configure(fg_color="green" if relay_states[i] else "gray")
update_relay_outputs()
return toggle

def turn_all_off():
for i in range(RELAY_COUNT):
relay_states[i] = False
buttons[i].configure(fg_color="gray")
update_relay_outputs()

ctk.set_appearance_mode("dark")
ctk.set_default_color_theme("blue")
app = ctk.CTk()
app.title("Antenna Relay Selector")
app.geometry("400x650")

relay_labels = load_labels()

for i in range(RELAY_COUNT):
btn = ctk.CTkButton(
app,
text=relay_labels[i],
fg_color="gray",
state="disabled",
command=make_toggle(i + 1)
)
btn.pack(pady=6, padx=20, fill='x')
buttons.append(btn)

status_label = ctk.CTkLabel(app, text="Not connected")
status_label.pack(pady=20)

connect_ftdi()

app.mainloop()

if ftdi:
ftdi.write(bytes([0x00])) # All relays OFF
ftdi.close()

it seems the sainsmart cards that look exactly alike come with two different chips sets… one will except serial commands, the one I have onky excepts ftdi links with precludes the pass though…. looking at options