This is one of the first FC with built-in ExpressLRS (ELRS) receiver – the BetaFPV F4 1S 5A AIO FC. It’s super light weight, perfect for brushless tiny whoops.
Some of the links on this page are affiliate links. I receive a commission (at no extra cost to you) if you make a purchase after clicking on one of these affiliate links. This helps support the free content for the community on this website. Please read our Affiliate Link Policy for more information.
The board itself uses as little material as possible to keep the weight down.
F4 Processor
MPU6000 Gyro
Built-in ExpressLRS RX
Loaded with Betaflight 4.3, BLHeli 16.8
Input Voltage: 1S
5A ESC (6A Burst)
1 full UART, 1 half UART for VTX control (TX pin)
Buzzer pad for beeper
Dimension: 29x29mm
Weight: 3.1g
Here’s the pinout schematics.
ExpressLRS Receiver Onboard
It has the ELRS 2.4GHz receiver built-in, with a ceramic antenna which makes it super compact. You don’t have to worry about mounting the RX antenna and worry about spinning propellers damaging it anymore.
The ELRS receiver is connected via SPI (not UART), so it’s setup slightly different in Betaflight (as explained on the product page, the receiver mode is set to SPI, and receiver provider is blank). But you don’t need to worry about the configuration as it’s all done in factory.
All you need to do is binding the FC to your radio by pressing the “Bind Receiver” button in the receiver tab. More info here.
The FC also has a SBUS pad in case you want to run an external receiver.
ESC and Motor Connection
It has motor connectors as well as solder pads, so you can either plug the motors directly to the board or solder your own.
The ESC’s are rated at 5A continuous current, 6A burst. This is suitable for 65mm as well as 75mm 1S tiny whoops.
The ESC’s are preloaded with BLHeli 16.8, meaning RPM filter is enabled out of the box. RPM filter is great for whoops as it increases flight time up to 50%.
Upgrading existing whoops to this FC is pretty straight forward.
Updating ExpressLRS Firmware
The ExpressLRS SPI receiver firmware is part of the Betaflight firmware, so updating ExpressLRS can be done through updating Betaflight firmware. Configuration parameters can be set in CLI (not via the LUA script on the radio). More info here: https://github.com/betaflight/betaflight/pull/10788
Do you have more info on setting up an external receiver? Do I have to use the same 5v pin as the vtx? What are the bz+/- pins? I’m basically trying to move a crossfire nano from the old no ex v2.2 f4 FC to the new one.
i purchase one of this boards assemble it on my meteor 75 frame i went in to bind my radio 2 se witch i buy the elrs board for this drone my whoop starts lights a red light and then when throttle up,it trys to go up all props spining the corect way but it shuts off any idea!i bet you do how can i fix it?
Try binding it to your TX module, if not binding then you need to update it to the same version as your TX module. There’s no easy way to check versions.
I ordered this. I has nothing but trouble with the HappeModel ELRS AIO board. The VTX there died. I think it’s better to leave the VTX as separated component. CSFR nano VTX as less than 1 gram. I have high expectations.
Hey Oscar, I would like to ask, are you aware of what version of ELRS these boards have? I know they come preflashed with a special Betaflight 4.3.0 hex file. I’m just not sure if it will be compatible with the current ELRS 1.2.0 version I have on my TX. Thanks!
We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept All”, you consent to the use of ALL the cookies. Click "Cookie Settings" to decline these cookies, make more detailed choices, or learn more.
This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
Cookie
Duration
Description
cookielawinfo-checkbox-analytics
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checkbox-functional
11 months
The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checkbox-necessary
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-others
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-performance
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy
11 months
The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
8 comments
Do you have more info on setting up an external receiver? Do I have to use the same 5v pin as the vtx? What are the bz+/- pins? I’m basically trying to move a crossfire nano from the old no ex v2.2 f4 FC to the new one.
Just connect it to T1 and R1 pins? and 5V on this board should work just fine for Crossfire nano.
i purchase one of this boards assemble it on my meteor 75 frame i went in to bind my radio 2 se witch i buy the elrs board for this drone my whoop starts lights a red light and then when throttle up,it trys to go up all props spining the corect way but it shuts off any idea!i bet you do how can i fix it?
Hi!!
how do I know which version of ELRS I am running??
Try binding it to your TX module, if not binding then you need to update it to the same version as your TX module. There’s no easy way to check versions.
Oscar, Can you please explain how to define the VTX with this board on Betaflight?
I ordered this. I has nothing but trouble with the HappeModel ELRS AIO board. The VTX there died.
I think it’s better to leave the VTX as separated component. CSFR nano VTX as less than 1 gram.
I have high expectations.
Hey Oscar, I would like to ask, are you aware of what version of ELRS these boards have? I know they come preflashed with a special Betaflight 4.3.0 hex file. I’m just not sure if it will be compatible with the current ELRS 1.2.0 version I have on my TX. Thanks!