flashing

Instructions http://rcdiy.ca/taranis-opentx-s-port-firmware-flashing/

I got a Eachine Racer 250, but I'm unable to connect to the FC with OpenPilot. Apparently, that was the included firmware. The flight controller doesn't have boot pads, so how am I supposed to flash it? The chip onboard is a gd32f103, a cheap STM32 compatible Cortex M3 MCU. Thanks, luketheduke

I'm looking for some guidance as I start to build a new quad. I have three 15 amp version 1 MultiStar ESC's from an older Tri-copter and purchased a version 2 15 amp MultiStar ESC that is loaded with BLHeli. Will I be able to use the three older and one newer together? If not, what if I...

I want to get into FPV racing so have been practicing fast and low in a field of wet grass. The other day my KK2 board failed on me. Display would light up but no text, board would also would not arm. I unplugged everything and looked for burn marks or other tell tail signs of missing smoke...

Quick question, Can You flash an ESC without a computer? Can it be done with a programmer?