Here is the binding procedure for the F4 Betaflight FC (SPI ExpressLRS Receiver)
This binding procedure could be used for the ELRS F4 1S 5A AIO FC and F4 1S 12A AIO V2.0 FC
Binding Procedure
There are two ways to bind with the receiver, as shown below
Button Binding
Put the receiver into bind mode using any of these steps:
- "Bind" button in the Betaflight Configurator, Receiver Page (if can't be found, update the Betaflight firmware).
- Using the CLI, type in BIND_RX and press enter once.
- Using the CLI, type in set expresslrs_uid = 0, press enter once, then save and reboot
- Press the bind button on the flight controller.
After the receiver enters the binding state, the receiver indicator on the FC will flash quickly.
At this time, execute ERLS.Lua in the remote control, and then press the BIND button. You can also press the bind button on the remote control or TX module to make TX enter the bind mode. RX and TX will now complete the binding.
Please pay attention to the sequence of binding steps. First make RX enter binding mode and then TX.
Binding Phrase
The binding phrase is hashed into 6 bytes represented as numbers. These 6 bytes are referred to as the UID bytes. UID bytes are entered into the Betaflight CLI for binding. When building via ExpressLRS Configurator or via VS Code, note down the UID bytes from the build log.
Setting Binding Phrase
The following commands need to be executed in the betaflight cli:
set expresslrs_uid = [ Your UID bytes ]
save
After completing the phrase binding settings, the binding will be automatically completed after the receiver and remote control startup.
RF Mode Adjustment
These AIOs with ExpressLRS SPI Receivers are set to use 500Hz as default. To adjust it, you will need to go into Betaflight CLI and use the following commands:
set expresslrs_rate_index = [your index]
save
Where [your index] corresponds to the following :
- 500Hz = 0
- 250Hz = 1
- 150Hz = 2
- 50Hz = 3
For example, if I want to switch the refresh rate to 250Hz, I need to execute these commands in betaflight cli:
set expresslrs_rate_index = 1
save
ExpressLRS 1.x.x or ExpressLRS 2.x.x
ExpressLRS 1.x.x TX only works with Betaflight firmware for ExpressLRS 1.x.x, and upgrading the transmitter to ExpressLRS 2.x.x means flashing the flight controller with a different Betaflight version. If upgrading minor versions, such as from ExpressLRS 1.1.0 to 1.2.0 on the transmitter, no changes to the flight controller are needed although there may be bug fixes to the ExpressLRS Betaflight implementation as well.
Comments
4 comments
There are two ways to bind the receiver,Button Binding and Binding Phrase.
https://www.expresslrs.org/1.0/hardware/spi-receivers/
Hello, I buy F4 1S 12A AIO V2.2
In this FC not work WiFi in ELRS?
I want to install ELRS 3.1.1.
I waited several minutes with the transmitter turned off but WiFi does not appear. I reconnected the power 3 and 4 times, but still WiFi does not work.
I also have F4 5A AIO, WiFi works in it. But there ELRS work only with UART1, since ELRS does not work via SPI, you need to install Meteor65 firmware in it ELRS uses UART1.
:(((
I have Lite radio 3, I can't bind Pavo Pico FC F4 ELRS. I try for all day and night. I give up!!!
I will install a external RX.
@Multisoft I know your comment is a year old but hopefully you finally got it all working for you. I was having the same problem. I was trying to update the receiver on the FC AIO for the pavo. I did everything that they said to do with the binding phrase. But nothing was happening. So I just took matters into my own hands. I went on the express LRS configurator. I found the two matches I needed. I did not use the express LRS Wi-Fi. I used my home Wi-Fi and I did not use a binding phase. I bypassed it, and then I scroll down to the bottom of the page. I did not build it first and then flash it I built and flashed it at the same time. when that was done, the receiver on the Pavo was updated to the firmware on my remote control, and then the two binding together. I found out that the trick is and the easiest way to do it is just use your home Wi-Fi and don’t use the binding phrase bypass it. because I’ve had the same problem with the Pavo pico. The pavo 20 and the Pavo 25V V2. And the way they describe how to do it never works and the way I did it always worked. Hopefully my comment doesn’t confuse you and you understand what I’m trying to say and I hope everything worked out for you. God bless and have a merry Christmas and a happy new year.
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