Skip to product information
Get directions
LUCKY DIP · Airbot Fenix G4 4-6S AIO FC (35A AM32): Faulty Voltage Reading (ADC), Sold As-Is
Lucky Dip price today
$55.00Was $119.00 new
GST included
1 In stock
Order in
H, M,
Seconds
(before 1pm Sydney time) for same day despatch.
Pickup available
1/80 Somersby Falls Road, Somersby NSW
Ready to collect Monday from 9:30am
- Open: Mon to Fri, 7:30am to 5pm
- Online orders: at the front counter by 9:30am, or about 2 hours after you order. We'll email you when it's ready.
- Walk-ins: come by any time we're open and buy over the counter.
What was reported
Battery voltage reading (onboard ADC) jumps wildly (0–6V on USB, erratic on 4S) whenever an ESC/motor protocol is selected, on any Betaflight version; it reads correctly with the protocol disabled.
Our take
Board otherwise appears to work, but the FC’s battery voltage reading can’t be trusted with motors enabled. Fine with a separate voltage alarm/sensor, for bench/test builds, or as a tinkerer’s fix (likely ADC noise from the ESC side).
Repair hint
Use an external voltage alarm/sensor, or try filtering noise on the vbat/ADC line.
Product details
SKU:
49956420
Shipping Weight:
50g
W/H:
T-03-C-07
Tags:
Airbot, AM32, AT7456E, Daily Price Drop, DPS310, Faulty, Flight Controller, ICM42688P, STM32G473
0 Hand-picked accessories
Compatible options selected by our team
Are you looking to buy LUCKY DIP · Airbot Fenix G4 4-6S AIO FC (35A AM32): Faulty Voltage Reading (ADC), Sold As-Is in Australia?
LUCKY DIP: faulty customer return, sold as-is. No returns, no warranty.
This listing is for one returned Airbot Fenix G4 4-6S AIO flight controller (toothpick/whoop, ICM42688-P gyro, 35A 32-bit AM32 4-in-1 ESC). It came back to us in May 2025 and has been sitting on the returns shelf since. We could pay to freight it back to the overseas supplier, but we'd rather it went to a tinkerer.
How the price works: it starts at $55 and drops every night at midnight for 30 days, down to a $15 floor. The floor price only lasts 24 hours. If nobody grabs it, the price goes back up to $55 and the 30-day countdown starts again. Wait too long and you could miss it, or have to wait another month.
About the photos: the stock photos are of a new one, for reference only. They don’t show this unit or its condition. The other photos show the actual returned unit. Want more photos of it? Email us at hello@phaserfpv.com.au and we’ll send some.
What was reported
- The battery voltage reading (onboard ADC) jumps around wildly, between 0 and 5–6V on USB, and higher but still erratic on a 4S battery.
- The owner found it happens whenever an ESC/motor protocol is selected, on any Betaflight version. With the motor protocol set to Disabled, the voltage reads correctly and steadily.
Our take
The board otherwise appears to work, but you can't trust its battery voltage reading while the motors are enabled. That means no reliable low-battery warning or voltage OSD from the FC itself.
- Could score: fly it with a separate voltage alarm or a dedicated current/voltage sensor, or use it on a bench or test build where telemetry doesn't matter.
- Tinkerers: it may be noise on the voltage-divider/ADC line from the ESC side. Someone handy might filter it.
- Worst case: a spare board for parts or testing.
Specs (when working)
- Airbot Fenix G4 AIO · 4–6S · ICM42688-P gyro
- 35A 32-bit 4-in-1 ESC (AM32) · toothpick/whoop mounting
Chips on the board (for parts hunters)
- MCU: STMicro STM32G473CEU6 (G4)
- IMU / gyro: TDK InvenSense ICM-42688-P
- Barometer: Infineon DPS310
- OSD: AT7456E
- 16MB blackbox flash · 35A AM32 4-in-1 ESC
Chips are as listed by the manufacturer for this model, not checked on this exact unit. They make it a handy donor for repairs.
Sold as-is, please read
- Lucky Dip items are untested or known-faulty returns sold at a special price.
- No returns, refunds, exchanges or warranty claims, including DOA. You're buying it exactly as described.
- Board only, as pictured. Its pads have been soldered before (it was wired into a build), so expect some solder on the pads.