Hi,
I tried your Python/USB commands from my Pi 3B+ and it works well. Is there a command to make it permanent? I mean after I power cycle it, all the LEDs stay off(except the power LED, I read you can’t turn it off from Python)?
Thanks.
The system diagram shows the LEDs are controlled through SPI by XFV3000. I guess for their current firmware, the LEDs can’t be turned off without a firmware change.
In my designs, I have a byte in flash/EEPROM with flags to control things like LEDs so there is no need for a new firmware if a user just wants to control the LEDs. A user can change the flash/EEPROM flags in a program similar to your USB/Python interface in RPi.
Hi there~
Here is the firmware with led off. Hope it can help. thanks.
<LINK_TEXT text=“https://github.com/SeeedDocument/forum_ … ed_off.bin”>https://github.com/SeeedDocument/forum_doc/raw/master/reg/1_channel_firmware_led_off.bin</LINK_TEXT>
Thanks Bill. I tried it and it works 
@bill.yu Is there an updated version (v3) of this special firmware with the lights off by default?
I would really appreciate that!
Kind regards,
Bastiaan