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Jun 26, 2023 at 17:50 comment added Robin Bennett If you wire the battery connectors together, you'll be suppling 4s voltage to a 3s device and it probably won't work. You need to take the battery power to a 12v regulator, and connect the 3s ESC to the 12v output from the regulator. I think you're right about using a UART, but I've never done it. ESCs use the same signal as a servo, and there are probably lots of guides for connecting a servo to a flight controller.
Jun 26, 2023 at 14:22 comment added demon_of_speed So if i wire the battery connector from the brushed ESC to the other ESC's Power connection, do I still need the linear regulator? Is a BEC the same the voltage regulator? Additionally, do you know if I should wire the brushed ESC's receiever wires to any of the 4 UART ports on the FC?
Jun 26, 2023 at 8:48 history answered Robin Bennett CC BY-SA 4.0