This is a great AIO board, but I really wanted to use IBUS on the SBUS port to free up UART6 for a GPS. I found this post on rcgroups (the greatest forum, check it out) that led me to the solution. https://www.rcgroups.com/forums/showthread.php?2872247-Racerstar-TattooF4S-Star-F3S-StarF4-StarF4S-50-AIO-FC-BF-OSD-30A-ESC-PDB-BEC/page3#post37622923 The SBUS pad on the edge of the board cannot be used for IBUS directly since it is routed through a hardware inverter (which cannot be controlled by Betaflight). The trick is to solder the IBUS cable not on the SBUS pad, but on the backside of the inverter, thus by-passing it. It worked great for me, I now have IBUS working and the UART6 free for other things. :-) The inverter is the black three pinned rectangular component over the right corner of the big ARM chip. NOTE! Only attempt this if you are willing to sacrifice the board if you make a mistake and you are good at soldering and you have an extremely small soldering tip and if you know 100% what you are doing. It is completely at your own risk. See pictures for details.

This is a great AIO board, but I really wanted to use IBUS on the SBUS port to free up UART6 for a GPS. I found this post on rcgroups (the greatest forum, check it out) that led me to the solution. https://www.rcgroups.com/forums/showthread.php?2872247-Racerstar-TattooF4S-Star-F3S-StarF4-StarF4S-50-AIO-FC-BF-OSD-30A-ESC-PDB-BEC/page3#post37622923 The SBUS pad on the edge of the board cannot be used for IBUS directly since it is routed through a hardware inverter (which cannot be controlled by Betaflight). The trick is to solder the IBUS cable not on the SBUS pad, but on the backside of the inverter, thus by-passing it. It worked great for me, I now have IBUS working and the UART6 free for other things. :-) The inverter is the black three pinned rectangular component over the right corner of the big ARM chip. NOTE! Only attempt this if you are willing to sacrifice the board if you make a mistake and you are good at soldering and you have an extremely small soldering tip and if you know 100% what you are doing. It is completely at your own risk. See pictures for details.

This is a great AIO board, but I really wanted to use IBUS on the SBUS port to free up UART6 for a GPS. I found this post on rcgroups (the greatest forum, check it out) that led me to the solution. https://www.rcgroups.com/forums/showthread.php?2872247-Racerstar-TattooF4S-Star-F3S-StarF4-StarF4S-50-AIO-FC-BF-OSD-30A-ESC-PDB-BEC/page3#post37622923 The SBUS pad on the edge of the board cannot be used for IBUS directly since it is routed through a hardware inverter (which cannot be controlled by Betaflight). The trick is to solder the IBUS cable not on the SBUS pad, but on the backside of the inverter, thus by-passing it. It worked great for me, I now have IBUS working and the UART6 free for other things. :-) The inverter is the black three pinned rectangular component over the right corner of the big ARM chip. NOTE! Only attempt this if you are willing to sacrifice the board if you make a mistake and you are good at soldering and you have an extremely small soldering tip and if you know 100% what you are doing. It is completely at your own risk. See pictures for details.

new best FC! but need silicone soft mount

new best FC! but need silicone soft mount

new best FC! but need silicone soft mount