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Description
Happymodel CrazyF411 20A F4 ELRS 2.4GHz Whoop AIO Flight ControllerThe CrazyF411 ELRS flight controller comes with integrated UART 2. 4GHz ExpressLRS receiver and 20A BLHeli_S ESC(Bluejay firmware pre installed) which could support 2 4s. Bigger Mosfet could support high to 20A currents would be better for 2 4S toothpick drone or long range FPV drone. And because the 2. 4GHz ExpressLRS receiver is equipped with the SX1280 radio frequency chip with high sensitivity, high packet rate and low latency, this flight
The CrazyF411 ELRS flight controller comes with integrated UART 2.4GHz ExpressLRS receiver and 20A BLHeli_S ESC(Bluejay firmware pre-installed) which could support 2-4s. Bigger Mosfet could support high to 20A currents would be better for 2-4S toothpick drone or long range FPV drone. And because the 2.4GHz ExpressLRS receiver is equipped with the SX1280 radio frequency chip with high sensitivity, high packet rate and low latency, this flight controller is the one that all Race/Freestyle pilots needed. The built-in ELRS receiver is UART communication with MCU, it’s the same like Happymodel EP1 which you can update firmware by Betaflight pass-through or WIFI, very simple. The default firmware is ELRS V3.0.1. This flight controller would be used for Crux35 to instead ELRS X1 flight controller.
Check out all our Flight Controllers and the rest of our HappyModel Express LRS Products!
Specifications:
| Flight controller | MCU:STM32F411CEU6 (100MHZ, 512K FLASH) Sensor: ICM42688P or BMI270 (SPI Control) Mount pattern: 25.5×25.5 M2 Size:32*28*9mm Power supply: 2-4S Lipo battery Built-in 20A Blheli_s ESC each Built-in Betaflight OSD(SPI Control) Built-in UART ExpressLRS 2.4GHz receiver Built-in 5V 1.5A BEC Flight controller firmware target: CRAZYBEEF4DX |
| Onboard 4in1 ESC | MCU upgraded to EFM8BB21 Power supply: 2-4S LiPo/LiPo HV (7v/17v) Currents: 20A continuous peak 25A (5 seconds) Support BLHeliSuite programmable Factory firmware: Bluejay 0.18.1Firmware target: F_H_40_48_v0.18.1 Default protocol: DSHOT150/DSHOT300/DSHOT600 |
| Onboard UART ExpressLRS 2.4GHz Receiver | Packet Rate option: 25Hz/50Hz/150Hz/250Hz/500Hz RF Frequency: 2.4GHzAntenna plug: IPEX Telemetry output Power: <12dBm Receiver protocol: CRSF Default firmware version: ExpressLRS V3.0.1 |
| Onboard voltage and Amperage meters settings | Voltage meter scale setting 110
Amperage meter scale setting 470 |
Package Includes:
- 1 x Happymodel CrazyF411 20A F4 ELRS 2.4GHz Whoop AIO Flight Controller
Binding procedure:
- Supply power to the flight controller by plug USB, wait until the green LED on the FC is off, immediately turn off the power, and then repeat again the above steps. When the FC is powered on for the third time, the green LED light will start to double-flash, which means that the RX enters the binding mode
- Please make sure your ExpressLRS tx module firmware is v3.x.x. And go to ExpressLRS.lua from “TOOLS” menu of your radio transmitter. Then hit [Bind] to binding with the onboard ExpressLRS receiver. The green LED should blinking slowly first then turn to solid, that means binding was successfully. If the green led still keep double flash after binding ,please change Model Match tab value from “off” to “on” or from “on” to “off”
Receiver LED status meanings:
Green LED solid means bind successful or RC link established; Green LED double-flash means get into bind mode; Green LED flash slowly means no RC signal input from TX module; Green LED continuous flash fast means ExpressLRS wifi enabled.
Bind successful
Bind mode
No RC Input
Wifi mode
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
4.6 ★★★★★
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Product Reviews
★★★★★ 5
Nearly 3 years later, Asurion had my back :)
In Nov of 2017 I bought a $900 35" Ultra wide PC monitor for Gaming and Work.
It was made by a company called AOC/Envision and I bought it through amazon.
The monitor had a 3 year warranty that I was still within but they said no to a defect that they said was only covered for 1 year, even though it wasn't the type of defect that was only covered for 1 year.
LUCKILY, back in 2017 I had purchased an Asurion insurance policy with this monitor.
I told an Asurion agent in a instant messaging chat window on the Asurion website my problem and she sent me postage in an email. I shipped my product and in 5 days from shipping it I received a text telling me that it was beyond repair and I would be getting a FULL REFUND!
Not 2hr later, in an email, there it was, an amazon gift card code for $900
I will not be making any big purchases without an Asurion plan going forward. Happy customer
Don't buy anything AOC
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Reviewed in the United States on October 16, 2020
★★★★★ 4
Received a refund
I purchased the 4-year protection plan offered at the time I purchased a refurbished printer. Seven months later the printer failed, so I went searching through my Amazon orders for my protection plan and located it. Once I created an account on Asurion's website it showed the the plan but it was not attached to a specific purchase, so I had to locate and upload the invoice for my printer. Once that was done, the policy still wasn't linked for some unknown reason. I proceeded to start the claim anyway stating that my printer had failed and I received an immediate reply stating that a box would be shipped to me for me to return the printer for inspection/repair. After a week I hadn't seen any additional info so I called their support phone #. The service was very good and they had to create a new case to replace the one I started online, and they assured me that a shipping box would be sent. About a week later I did receive the box with a prepaid shipping label to return the item by UPS. I packaged the printer up and sent it off. I received updates stating that they received it, were looking at it and attempting repairs. Everything appeared to be going along well, then out of the blue they sent me a notification of a full refund in the form of an Amazon gift card. Overall I'm satisfied and I'm glad I purchased the coverage.
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Reviewed in the United States on October 6, 2022
★★★★★ 5
Get this INSURANCE A MUST!!!
The best company top tier add it to your purchase !!!!
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Reviewed in the United States on July 21, 2025
★★★★★ 1
Worst Experience of my Life
My Epson printer had problems with it's software in early mid April, while trying to resolve the software glitch which I could not, I found that every picture I had scanned for some time had lines running through it and no cleaning process or other process that Epson had would get rid of it, and everything I had scanned for my project, was ruined. I sent the machine to Asurion following their instructions and explaining the issues. They sent it back to me after a month saying they had double checked and fixed everything, I spent some time setting it all back up, only to find that exactly the same two issues were still present and the machine was unusable. I sent in a second request, this time they sent it back to me a month later saying they couldn't find anything wrong with it. Hooked it up again, same problem. I complained numerous times asked for them to warranty the item; they would not unless I sent it back to them and they kept it and then they would give me a credit on my amazon account to buy a new one. I packed it up and drove to UPS a third time and mailed it back to them, after about three weeks they sent me a note that they had it and that they were sending it back to me as they couldn't find anything wrong. Three times I ha filled out their entire sheet with product, date of purchase, problems detailed, receipts, picture of the lines in the photos that it was making over all the scanned photos. Then after two weeks of back and forth they sent me a message telling me they couldn't warranty it until I filled all this information out again on line. Then they told me they couldn't read the tiny print off the receipt printed off the Amazon site, which I cannot change. I then blew up the receipts and circled everything and sent it back to them again...of course they already had now five copies of this same information, they had paid for postage three times to NY and back to fix it and they still aren't able to process a payment to me????? Finally I get a call from a gentleman telling me that I will have a credit to my Amazon Card in 72 hours. Great. Then he calls me back the next day and says the warranty team has decided they would not warranty the item and credit me but they will mail me a check in 7 to 10 days. After over four months of this I received a check...will it bounce? I don't know yet. My project that I was working on was for my mother's Celebration of Life, I could not do what I wanted to do for her, this caused me emotional pain, as well as the obvious frustration of four months of aggravation and complete and total ineptitude on their part.
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Reviewed in the United States on August 10, 2024
★★★★★ 5
Asurion Protection is worth it
After 3 years monitor had power issues. Asurion was unable to repair the monitor and provided a full refund with an Amazon Gift Card. Support was excellent and process was quick and easy.
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Reviewed in the United States on April 13, 2026