{"product_id":"lucky-dip-airbot-fenix-g4-aio-49956420","title":"LUCKY DIP · Airbot Fenix G4 4-6S AIO FC (35A AM32): Faulty Voltage Reading (ADC), Sold As-Is","description":"\u003cp\u003e\u003cstrong\u003eLUCKY DIP: faulty customer return, sold as-is. No returns, no warranty.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis listing is for \u003cstrong\u003eone returned Airbot Fenix G4 4-6S AIO flight controller (toothpick\/whoop, ICM42688-P gyro, 35A 32-bit AM32 4-in-1 ESC)\u003c\/strong\u003e. It came back to us in \u003cstrong\u003eMay 2025\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow the price works:\u003c\/strong\u003e it starts at $55 and \u003cstrong\u003edrops every night at midnight\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout the photos:\u003c\/strong\u003e the stock photos are of a \u003cstrong\u003enew\u003c\/strong\u003e 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 \u003ca href=\"mailto:hello@phaserfpv.com.au\"\u003ehello@phaserfpv.com.au\u003c\/a\u003e and we’ll send some.\u003c\/p\u003e\n\n\u003ch3\u003eWhat was reported\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003ebattery voltage reading (onboard ADC) jumps around wildly\u003c\/strong\u003e, between 0 and 5–6V on USB, and higher but still erratic on a 4S battery.\u003c\/li\u003e\n\u003cli\u003eThe owner found it happens \u003cstrong\u003ewhenever an ESC\/motor protocol is selected\u003c\/strong\u003e, on any Betaflight version. With the motor protocol set to Disabled, the voltage reads correctly and steadily.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eOur take\u003c\/h3\u003e\n\u003cp\u003eThe board otherwise appears to work, but you \u003cstrong\u003ecan't trust its battery voltage reading\u003c\/strong\u003e while the motors are enabled. That means no reliable low-battery warning or voltage OSD from the FC itself.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCould score:\u003c\/strong\u003e 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTinkerers:\u003c\/strong\u003e it may be noise on the voltage-divider\/ADC line from the ESC side. Someone handy might filter it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorst case:\u003c\/strong\u003e a spare board for parts or testing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecs (when working)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAirbot Fenix G4 AIO · 4–6S · ICM42688-P gyro\u003c\/li\u003e\n\u003cli\u003e35A 32-bit 4-in-1 ESC (AM32) · toothpick\/whoop mounting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eChips on the board (for parts hunters)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMCU: STMicro \u003cstrong\u003eSTM32G473CEU6\u003c\/strong\u003e (G4)\u003c\/li\u003e\n\u003cli\u003eIMU \/ gyro: TDK InvenSense \u003cstrong\u003eICM-42688-P\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBarometer: Infineon \u003cstrong\u003eDPS310\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eOSD: \u003cstrong\u003eAT7456E\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e16MB blackbox flash · 35A AM32 4-in-1 ESC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eChips are as listed by the manufacturer for this model, not checked on this exact unit. They make it a handy donor for repairs.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eSold as-is, please read\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLucky Dip items are untested or known-faulty returns sold at a special price.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo returns, refunds, exchanges or warranty claims\u003c\/strong\u003e, including DOA. You're buying it exactly as described.\u003c\/li\u003e\n\u003cli\u003eBoard only, as pictured. Its pads have been soldered before (it was wired into a build), so expect some solder on the pads.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Airbot","offers":[{"title":"Default Title","offer_id":48481160659115,"sku":"49956420","price":52.24,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1477\/4314\/files\/airbot-fenix-g4-4-6s-aio-toothpickwhoop-flight-controller-w-35a-32bit-am32-4in1-esc-image-1-darkmode-v4-review.webp?v=1792166154","url":"https:\/\/phaserfpv.com.au\/products\/lucky-dip-airbot-fenix-g4-aio-49956420","provider":"Phaser FPV","version":"1.0","type":"link"}