The H7 Upgrade Removes a UART—and Your Current Sensor
Quick Answer
The iFlight Borg Mini H7 is not a straight upgrade over the Borg F7 Mini. It adds an H743 processor and onboard 2.4GHz ExpressLRS, but drops from six UARTs to five and pairs with a 60R ESC that has no current sensor. We would choose the H7 for a compact ELRS racer; the F7 remains the better instrumented stack.
What the H7 Actually Changes
Our two Borg listings expose the trade more clearly than the processor names do. The iFlight Borg Mini H7 stack combines an STM32H743VIH6, ICM42688 gyro, 32MB blackbox flash and onboard ESP8285/SX1281 2.4GHz ExpressLRS receiver. It gives you five UARTs, a 5V 2.5A rail and a switchable 12V 2A rail on a 20 × 20mm mount.
That integration is the H7's strongest argument. On a cramped racing frame, deleting a receiver, its wires and its mounting tape is more useful than quoting processor benchmarks. The catch is easy to miss: the H7 has one fewer UART than the F7, and iFlight explicitly lists no current sensor on the Borg 60R ESC. ESC telemetry is supported, but that is not the same as measuring total battery current.
Why the F7 Is Still the Sensible Default
The iFlight Borg F7 Mini stack uses an STM32F722RET6, the same ICM42688 gyro and 32MB flash, while providing six UARTs. Its 60 Mini ESC includes a current sensor. For a build where accurate amp-hour consumption matters, or where you want receiver, GPS, digital video control and spare serial capacity, we would keep the F7.
Both stacks use 20 × 20mm mounting, support 60A continuous and 65A ten-second ESC ratings, and provide 5V 2.5A plus switchable 12V 2A BEC outputs. Both also reach 8S, but voltage support is not proof that your motors, capacitor, VTX or propeller load belong on 8S. Our position is simple: buy the H7 to simplify an ELRS race build, not because H7 automatically makes the aircraft fly better.
The Decision the Specification Table Hides
| Feature | Borg Mini H7 | Borg F7 Mini |
|---|---|---|
| Processor | STM32H743VIH6 | STM32F722RET6 |
| UARTs | 5 | 6 |
| Receiver | Onboard 2.4GHz ELRS | Separate receiver required |
| Current sensor | No | Yes |
| Blackbox | 32MB flash | 32MB flash |
If you are still choosing by MCU letter alone, read our F4 versus F7 versus H7 explanation. The practical difference here is board-level integration, not an abstract H7 victory. These are both compact stacks rather than AIO boards; our AIO versus stack guide explains why that matters for repairs. You can browse the wider flight-controller range, but we would not replace a working Borg F7 merely to gain the H7 badge.
FAQ
Q: Does the Borg Mini H7 need a separate receiver?
A: Not for 2.4GHz ExpressLRS. Its onboard ESP8285 and SX1281 receiver uses an external antenna and is listed with 100mW telemetry power.
Q: Can the H7 stack show battery current in the OSD?
A: Its Borg 60R ESC has no current sensor. Do not assume ESC telemetry supplies total-current data; plan an external measurement source if amp-hour tracking is required.
Q: Which Borg stack would we buy?
A: For a compact ELRS racing quad, the H7 removes useful wiring. For broader peripheral support and measured battery current, we would buy the F7 Mini.