SKU: 74950844333

Happymodel CruxF405 HD AIO Flight Controller 3-4S 20A ESC-UART ELRS 2.4GHz- 20x20mm

$66.59 $73.99
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Description

Happymodel CruxF405 HD AIO Flight Controller 3-4S 20A ESC-UART ELRS 2.4GHz- 20x20mmThe CruxF405HD ELRS AIO flight controller comes with integrated UART 2. 4GHz ExpressLRS receiver and 20A Blheli_s ESC(Bluejay firmware pre installed) which could support 3 4s battery. Bigger Mosfet could support high to 20A currents would be better for 3 4S toothpick drone or long range FPV drone. Reserved 6 pin socket for DJI HD equipment plug and play. Its a great solution of build HD digital FPV drone . No longer supports 2S, only 3S 4S. Check out

The CruxF405HD ELRS AIO flight controller comes with integrated UART 2.4GHz ExpressLRS receiver and 20A Blheli_s ESC(Bluejay firmware pre-installed) which could support 3-4s battery. Bigger Mosfet could support high to 20A currents would be better for 3-4S toothpick drone or long range FPV drone. Reserved 6 pin socket for DJI HD equipment plug and play. It’s a great solution of build HD digital FPV drone .

No longer supports 2S, only 3S-4S.

Check out all our Flight Controllers and the rest of our HappyModel Products!

SPECIFICATIONS:

Flight controller

  • MCU: STM32F405RGT6 (168MHZ, 1Mbyte FLASH)
  • GYRO Sensor: ICM42688  (SPI connection)
  • Mount hole size: 20mm*20mm
  • Power supply: 3~4S battery input (DC 8.7V-17.4V)
  • Built-in 20A(each) Blheli_S 4in1 ESC
  • Built-in Serial ExpressLRS 2.4G (Default connected to UART2)
  • Built-in BMP280 Barometer
  • Built-in 8MBp blackbox
  • Built-in voltage meter sensor , voltage meter scale 110
  • Built-in current meter sensor , current meter scale 470
  • Flight controller firmware target: BETAFLIGHTF4

Onboard 4in1 ESC

  • MCU upgraded to EFM8BB21
  • Power supply: 3-4S LiPo/LiPo HV (7v/17v)
  • Currents: 20A continuous peak 25A (5 seconds)
  • Support BLHeliSuite programmable
  • Factory firmware: Bluejay 0.19.2
  • Firmware target: F_H_40_48_v0.19.2
  • Default protocol: DSHOT150/DSHOT300/DSHOT600

Onboard UART ExpressLRS 2.4GHz Receiver

  • Packet Rate option: 25Hz/50Hz/150Hz/250Hz/500Hz
  • RF Frequency: 2.4GHz
  • Antenna 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

Binding procedure:

  1. Supply power to the flight controller by plug USB, wait until the red 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 red LED light will start to double-flash, which means that the Receiver enters the binding mode
  2. 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 red LED should blinking slowly first then turn to solid, that means binding was successfully. If the red led keep tri-flash after binding ,please change Model Match tab value from “off” to “on” or from “on” to “off”

Receiver LED status meanings:

Red LED solid means bind successful or RC link established; Red LED double-flash means get into bind mode; Red LED flash slowly means no RC signal input from TX module; Red LED continuous flash fast means ExpressLRS wifi enabled; Red LED tri-flash means model mismatch need to change model match from “off” to “on”.

UART description:
ELRS receiver was connected to UART2 default out of factory.
Usually UART1 or UART6 Could be used for MSP OSD with HD VTX.
UART6 could be used for GPS or other serial equipment.
IRX6 is an inverted serial RX6 for SBUS input.
IRX6 and TX6/RX6 couldn’t be used at the same time.

NOTES:

If upgrade firmware to betaflight 4.4.x , need to add custom Defines “GYRO_SPI_ICM42688P ACC_SPI_ICM42688P” from build configuration of betaflight configurator otherwise gyro will not working . 

If you want to enable Barometer , please connect to betaflight configurator and go to CLI command ,then type the following command:

resource I2C_SCL 2 B10
resource I2C_SDA 2 B11
set baro_bustype = I2C
set baro_i2c_device = 2
save


Package Includes:

  • 1x Happymodel CruxF405 HD AIO Flight Controller 2-4S 20A ESC-UART ELRS 2.4GHz- 20x20mm


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 74950844333

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pen_name
New York, US
★★★★★ 5
Delicious!
Flavor Name: Chocolate, Size: 14 Fl Oz (Pack of 12)
I’ve tried a lot of protein shakes and this one is hands down my favorite choice. It tastes like a delicious glass of chocolate milk, without being overly sweet the way some other protein drinks are, and the texture is perfect - neither chalky nor too thick. Some folks don’t like the sugar in the ingredients list but for me, 42g of protein in 230kcal is a godsend for meeting my daily macros. And it’s lactose free so zero issues with digestion. I use a little in my morning coffee as a coffee creamer and drink the rest with breakfast - a great and easy way to start my day with a good amount of protein.
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Reviewed in the United States on March 30, 2026
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Giamji
Houston, US
★★★★★ 4
Smooth, chocolate milk flavor with a massive protein punch
Flavor Name: Chocolate, Size: 14 Fl Oz (Pack of 12), Flavor Name: Chocolate, Size: 14 Fl Oz (Pack of 12)
The Context: I’ve tried a wide variety of protein supplements over the years, and many of them are a struggle to get down due to a thick, chalky texture or a chemical aftertaste. I picked up the Core Power Elite 42g shakes to use as a convenient meal replacement on busy days, and they have quickly become my go-to. The Performance: Flavor and Texture: The standout feature here is the taste. It genuinely tastes like high-quality chocolate milk rather than a supplement. It is remarkably smooth and lacks that dry, chalky finish that usually plagues high-protein drinks. Satiety: With 42g of protein in a single 14oz bottle, these are incredibly effective at keeping you full. When used as a meal replacement, I’ve found that they keep hunger at bay for significantly longer than lighter shakes or snacks. Convenience: The 12-pack is a great value, and the bottles are perfect for a grab-and-go lifestyle. They don't require any mixing or shaking to get rid of clumps, which makes them ideal for the car or the office. Nutritional Profile: For the amount of protein you're getting, the calorie count and sugar levels are well-balanced, making it easy to fit into a variety of nutritional plans without feeling like a "cheat" meal. Pros: Great Taste: No chalky texture or medicinal aftertaste. High Protein Content: 42g is a significant amount that helps with satiety. Solid Value: Purchasing the 12-pack is much more cost-effective than buying individual bottles. Cons: Thickness: Because it is milk-based, it is a bit richer than a water-based shake, which some might find heavy if they aren't used to it. The Verdict: If you want the benefits of a high-protein supplement but hate the typical "protein shake" experience, these are the answer. They are delicious, filling, and convenient. Whether you're using them for recovery or just as a quick meal replacement, they are one of the best-tasting options on the market.
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Reviewed in the United States on May 14, 2026
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Sls701
Whiting, US
★★★★★ 5
Great Protein Source
Flavor Name: Chocolate, Size: 14 Fl Oz (Pack of 12)
Low calories, tastes awesome, good ingredients, convenient to throw in my backpack because it is resealable and doesn’t leak. Price is a bit high, however, the protein content is some of the highest I’ve seen. I drink at least 2 of these a day and have a case pack set up for auto renew every 2 weeks.
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Reviewed in the United States on April 14, 2026
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J. Howard
West Palm Beach, US
★★★★★ 5
Smooth, tastes good, and ... WOW! 42g protein!
Flavor Name: Chocolate, Size: 14 Fl Oz (Pack of 12)
With 42g protein, I was a tad concerned about taste, though the reviews were encouraging. Many say it is smooth and tastes like chocolate milk. For sure, it is smooth and tastes good, similar to chocolate milk, but there is a marked difference between its taste and that of chocolate milk. Has a little bit of an aftertaste. For me, it is much better than was expected and I'm thrilled with the 42g. I will absolutely have one daily and recommend it to others, along with this tip – drink it very cold.
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Reviewed in the United States on March 26, 2026
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James & Gabrielle
Cuba, US
★★★★★ 5
Great Gum to Help with Health Journey
Flavor Name: Spearmint, Size: 55 Count (Pack of 1)
This PUR Spearmint gum gets five stars from me. The spearmint flavor is really good and refreshing, but the only downside is the flavor doesn’t last super long compared to regular gum. Still, I bought this more for the cleaner ingredients than anything else since it fits into my current health journey and I wanted something aspartame-free. The gum has a little outer shell coating on it, but it’s still soft and easy to chew. It’s not hard or weirdly crunchy or anything like that. The family-size bag is also nice because it’s easy to throw in your car, backpack, or wherever without taking up a ton of space. Plus the resealable zipper bag helps keep it fresh. If you’re trying to avoid a bunch of chemicals and want a cleaner chewing gum option, this is definitely worth trying. I’d buy it again.
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Reviewed in the United States on May 27, 2026

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