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Description
Happy Model - X12 ELRS Pro v1.1 5-IN-1 AIO flight controller built-in 2.4G ELRS V3.0 and OPENVTXBuilding a featherweight FPV whoop or toothpick and tired of wiring spaghetti? The Happymodel X12 ELRS Pro V1. 1 is here to declutter your life (or at least your drone build). This isn't just a flight controller; it's a highly integrated 5 in 1 AIO (All In One) powerhouse packing an F411 FC, a 12A Blheli_S ESC, a built in OpenVTX, AND a UART ExpressLRS receiver onto a single, tiny board. What makes the "Pro V1. 1" special? It utilizes a dedicated
Building a featherweight FPV whoop or toothpick and tired of wiring spaghetti? The Happymodel X12 ELRS Pro V1.1 is here to declutter your life (or at least your drone build). This isn't just a flight controller; it's a highly integrated 5-in-1 AIO (All-In-One) powerhouse packing an F411 FC, a 12A Blheli_S ESC, a built-in OpenVTX, AND a UART ExpressLRS receiver onto a single, tiny board.
What makes the "Pro V1.1" special? It utilizes a dedicated ESP32 chip to manage the onboard VTX and the super-reliable UART ExpressLRS V3.0 receiver . This frees up the main STM32F411 processor to focus purely on flight performance and gives you back a precious UART port compared to SPI receiver versions. Plus, updating the ELRS firmware is a breeze via WiFi!
Designed for 1-2S LiPo builds , this board features a robust 12A 4-in-1 ESC (running smooth Bluejay firmware out of the box) and a capable OpenVTX switchable up to 400mW via Betaflight OSD/MSP control. With its standard 25.5x25.5mm whoop mounting pattern and weighing only 5.1 grams, it's the perfect brain for your next agile micro FPV drone.
Search Terms You Might Have Used (Welcome aboard!): AIO Flight Controller, Whoop FC, ExpressLRS FC, Built-in ELRS Receiver, 12A ESC AIO, F411 Flight Controller, Happymodel X12 Pro, UART ELRS Flight Controller, 5-in-1 FC, OpenVTX AIO, Micro Drone FC, Toothpick Flight Controller, 1S FC, 2S Flight Controller.
Specifications:
- Brand Name: Happymodel
- Item Name: X12 ELRS Pro V1.1 AIO 5-IN-1 Flight Controller
- MCU: STM32F411CEU6 (100MHz, 512K Flash)
- Co-processor: ESP32-PICO-D4 (for ELRS RX & VTX)
- Gyro Sensor: ICM42688P (SPI connection)
- Mounting Hole Size: 25.5mm x 25.5mm
- Size: 30mm x 30mm x 8mm
- Weight: 5.1g
- Power Supply: 1-2S LiPo/LiPo HV input (DC 2.9V-8.7V)
- Betaflight Firmware Target: CRAZYBEEF4DX - check happymodels official website for latest resources, Betaflight 4.4.x recommended)
Onboard 4-in-1 ESC:
- Current Rating: 12A continuous, 15A peak (3 seconds)
- Firmware: Bluejay v0.19.2 (Factory)
- Default Protocol: DSHOT300
- Supports: BLHeliSuite
Onboard UART ExpressLRS 2.4GHz Receiver:
- Firmware Version: ExpressLRS V3.0.0
- RF Frequency: 2.4GHz
- Antenna: SMD Antenna
- Packet Rate: 50Hz/150Hz/250Hz/500Hz
- Telemetry Power: <12dBm
- Protocol: Serial-based CRSF
- Flash Method: WiFi
- ELRS Target: HappyModel AIO 2.4GHz RX+VTX (via ExpressLRS web flasher, v3.4.0 RC2+)
Onboard 5.8GHz OpenVTX:
- Firmware: OpenVTX
- Control Protocol: MSP VTX (Betaflight OSD Control)
- Features: PIT Mode, RCE Mode
- Channels: 40ch
- Transmitting Power: 0mW (PIT) / RCE / 25mW / 100mW / 400mW
- Power Supply: DC 5V
- Current Draw (5V): <650mA @ 400mW
- VTX Antenna Connector: U.FL
What's In The Box:
- 1 x Happymodel X12 ELRS Pro V1.1 AIO Flight Controller
- Mounting Grommets & Screws (Typically)
- 1 x 5.8GHz Antenna (Typically a linear dipole with U.FL)
- Power Lead Wire/Connector (Typically PH2.0 or requires soldering)
Disclaimer: Included accessories, like the exact type of screws, grommets, antenna style, or power connector, can vary based on the supply batch from Happymodel. Always verify contents upon receipt. Ensure you use the correct Betaflight firmware target provided by Happymodel for optimal performance.
Specifications:
Brand Name: Happymodel
Item Name: X12 ELRS Pro AIO 5-IN-1 Flight controller built-in 12A ESC and OPENVTX
Betaflight firmware target:
betaflight_4.4.0_STM32F411
VTX antenna: U.FL
Weight: 5.1g
Size: 30mm*30mm*8mm
| Flight controller |
X12 ELRS Pro v1.1 AIO 5-IN-1 Flight controller
MCU:STM32F411CEU6 (100MHZ, 512K FLASH) ,ESP32-PICO-D4 Sensor: ICM42688P(SPI connection) Mount hole size: 25.5mm*25.5mm Power supply: 1-2S battery input (DC 2.9V-8.7V) Built-in 12A(each) Blheli_S 4in1 ESC Built-in Betaflight OSD(SPI Control) Built-in 5.8G OpenVTX 0mw~400mw (MSP control) Built-in UART ExpressLRS v3.0.0 Built-in voltage meter sensor , voltage meter scale 110 Built-in current meter sensor , current meter scale 470 |
| Onboard 4in1 ESC |
Power supply: 1-2S LiPo/LiPo HV
Current: 12A continuous peak 15A (3 seconds) Support BLHeliSuite programmable Factory firmware: Bluejay v0.19.2 Default protocol: DSHOT300 Recommend ESC Startup power value to min1100/max1200 |
| Onboard UART ExpressLRS 2.4GHz Receiver |
Packet Rate option: 50Hz/150Hz/250Hz/500Hz
ExpressLRS Firmware version: V3.0 RF Frequency: 2.4GHz Antenna : SMD antenna Telemetry output Power: <12dBm Receiver protocol: Serial_based CRSF Compatible with ExpressLRS V3.x.x TX Module Could flash single ELRS receiver firmware by Wifi ExpressLRS firmware target: HappyModel AIO 2.4GHz RX+VTX (ExpressLRS web flasher) Available from Expresslrs version 3.4.0 RC2 |
| Onboard 5.8g OPENVTX |
Firmware version: OPENVTX
MSP VTX PIT Mode support Channels:40ch Transmitting Power: 0/RCE/25mw/100mw/400mw Power supply: DC 5V Current (5v): <650ma (400mw) Antenna connector: U.FL |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 3
Good, But Not Great
Format: Kindle
3.5 stars
In the fourth, but hopefully not final, book in Elle Kennedy’s enjoyable Off Campus contemporary new adult romance series, another university student hockey player and lovely young woman find a future in each other as they move inexorably towards adult lives.
Sabrina James has been surviving on ambition, overwork, and very little sleep as she drives herself through her final undergrad year. Determined to make a better life for herself and gain distance from her grinding family life, she is going to go to law school if it kills her. Her upbringing in an unpleasant, complicated family has made her self-reliant to the point of leeriness and incredibly driven. It’s been a long time since I wanted to see a heroine to escape as much as I wanted a better life for Sabrina. Show me a capable woman fighting dream crushers telling her who she is and you have my full attention.
Letting off steam one evening, Sabrina meets John “Tuck” Tucker. He’s a charming member of the men’s hockey team at her university. While she likes athletes, she has sworn off hockey players after a bad experience with one. Tuck’s a temptingly engaging and unassuming guy though, so she makes an exception for him just for one night. Laid-back Tuck finds himself smitten with tough, but sweet Sabrina and he pursues her until – WONDER OF WONDERS AND MIRACLE OF MIRACLES – she tells him she’s not interested and he backs off. (Let’s pause to thank Elle Kennedy for a hero taking no for answer.) When Sabrina realises she’s pregnant, she finds herself seeking Tuck out and things move forward from there. Tuck is all in.
It’s been three years since I asked this question, but I still don’t have the answer. Should a hero be a perfect guy or the perfect guy for the heroine? Is there a difference? Tuck is pretty amazing. He’s grounded, patient, an enthusiastic and attentive paramour, hard-working, calm, rational, responsible, patient again plus synonyms for it, mature, kind, sensible, fun, good-looking, protective in a non-overbearing way, bearded (to start off with and, admittedly, that may only make him perfect to me), supportive, and financially secure. Tuck gives Sabrina time and space, he participates as much or as little as she wants him to with her pregnancy and its ramifications, and bides his time while she comes around to the same conclusion he did the night they met.
Tuck and Sabrina face almost insurmountable odds in succeeding with the stresses of their relationship, school, baby, and getting established in adult lives and all, I thought, with virtually no sacrifices. I guess that’s where the wish-fulfillment part of these books comes in. Young people having an instant family plot is not my favourite, but Kennedy did a good job with the story and she continues to be very good at writing friendships in addition to the love story. I will be buying all of the other books in the Off Campus series as they are published.
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Reviewed in the United States on January 13, 2017
★★★★★ 5
🥺🤭🤍👏🏼
Format: Kindle
“My goal, once upon a time, was to succeed. I didn’t realize that success wasn’t grades or scholarships or achievements, but the people I was lucky enough to have in my life.” 👏🏼
I will say again I absolutely love this series. But Tucker’s southern drawl, patience, sweetness, and maturity level😍 this man is amazing! Seeing Sabrina character grow from unsure about love or trusting anyone. To falling for a guy that broke all those walls down for her. Ughhhh my heart!!!
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Reviewed in the United States on May 28, 2026
★★★★★ 4
great book!
Format: Kindle
Great book! I loved the main male character. Storyline was pretty good. I would recommend it but don’t feel like it’s 5 stars.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Great couple!
Format: Kindle
This is my second read of this story. And I loved it then, and I loved it now. Tucker is super sweet but also sexy steamy. Sabrina is independent and feisty. But I loved how they brought out the others non dominant sides. They had great chemistry and although it wanted to shake Sabrina at times lol, Tucker is totally patient and such a great book boyfriend!
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Reviewed in the United States on May 28, 2026
★★★★★ 4
LOVED Tucker!!
Format: Kindle
4 stars — I was actually most looking forward to Tucker’s story, and while I loved it, it didn’t end up being my favourite. Weird how that works right?
Now as I fully anticipated, I LOVED Tucker. Like LOVE LOVED him. He was everything I was hoping for and more. I adored how he was this delicious blend of sweet, caring, genuinely good guy mixed with a delightfully dirty mind. I think that was the part that surprised me, though I’m not sure why. But damn, that boy had it going on!! And yet he was still so gentlemanly…god, I love that mix. And he was so freaking patient! Like, I couldn’t even believe it sometimes. He was almost too patient on occasion, b/c he wouldn’t push Sabrina at all, and maybe she needed a little push. But I loved how he could see through Sabrina’s bullcrap to the heart of her. And I loved how he didn’t let the curveballs throw him off his path, he stayed true to himself and wouldn’t make choices that he couldn’t be happy with when it came to his life.
While I wasn’t surprised that I loved Tucker, I will admit that I was surprised I loved Sabrina too. I loved how driven she was, and how she put on that persona of being a witch with a b to keep people away, but underneath she was extremely vulnerable. I also thought that Ms. Kennedy did a great job of showcasing the challenges of poverty through her situation. She desperately wanted a better life, and she thought she knew exactly what that better life would look like. While both Sabrina and Tucker aggravated me with their stubbornness and wrong assumptions (it’s not my favourite trope), she took a bit longer than I wanted to figure stuff out. It’s not that I didn’t get that her family life and childhood damaged her, but she was being an idiot and I was sad that none of her friends woke her up. Another thing that bugged me was that, in my opinion, she was seriously emotionally abused, and I kind of wished that that had been addressed at some point. Her Nana was, quite frankly, awful to her, and her love felt very conditional. And the way Sabrina would excuse Ray’s behavior…well, I just wish that someone had told her that that’s not normal, and gotten her some guidance.
Tucker and Sabrina were interesting together. Obviously they had amazing chemistry, and there were so many sweet moments that I just loved. But their relationship was a bit dysfunctional, and I felt like I needed a bit more near the end when things changed. I just would have appreciated learning a bit more about their motivations, or seeing more frank discussions between the two of them…it just felt like I didn’t understand why this time it was different, you know?
The plot in this one flowed a bit differently for me, especially the second half. It just didn’t feel like the usual narrative structure I’m used to, with the build up to a conflict and climax. As I said, I kept waiting for the turnaround, but it just kind of snuck in there with a lot of little ups and downs.
And can I also say that I hated the way Tucker’s Mom behaved? She was truly awful, and I’m not sure I ever fully understood her motivations, or what she was like, or how Tucker became who he was with that kind of mother.
On the completely other side of it, I loved seeing the group interact again. I really love all those boys and the girls they fell in love with. I also really appreciated that Dean and Sabrina worked things out, but weren’t all buddy buddy. And as for other secondary characters, I loved Sabrina’s friends and seeing a bit more of some of the other hockey boys. I’m so excited to know we’ll be getting a bit more of some of them.
So yeah, so much goodness in this one, just a few little niggles that made it not the hit out of the park I was expecting. But a seriously great end to a fantastic sports romance series.
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Reviewed in the United States on March 9, 2018
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