rusEFI likes Tag Connect so many boards have that small TC2030 footprint - microRusEFI, Hellen, Proteus and wideband etc.
TC2030-CTX-NL-STDC14 and STLINK-V3MINI is the easiest to use combo.
![x](/rusefi/rusefi_documentation/media/commit/6827702083d499bb9085cd878125e62ac4247aaa/Images/tc2030-stlink-v3.jpg)
Way more ghetto option would be
![x](/rusefi/rusefi_documentation/media/commit/6827702083d499bb9085cd878125e62ac4247aaa/Hardware/microRusEFI/TC2030_SWD.jpg)
![x](/rusefi/rusefi_documentation/media/commit/6827702083d499bb9085cd878125e62ac4247aaa/Hardware/tc2030.png)
Four more important wires are: