HappyModel Cross F4

[mighty glacier]

I’ve flashed my board with Betaflight pass through to 3.20 but firmware says rev: “merge” in 10.0.01. If I try to update to 2.52 or 3.01, it will say successful but then no longer create the web page, bind and go into slow blink mode. It’s gone into this slow blink till I’ve unbricked it with betaflight pass through but it’s just been a continual cycle. Any help please!

[slender gorge]

go into C:\Users\<username>\AppData\Roaming\ExpressLRS Configurator\firmwares\cloud and delete ExpressLRS folder

then reflash via Passthrough

or reflash using the !webflasher

[normal birch]

https://expresslrs.github.io/web-flasher/

[mighty glacier]

When I went into c: folder and try to follow the path I don’t have app data and the rest of the path. When I searched for expresslrs or cloud folder not luck

[mighty glacier]

I tried web flasher and no luck. The board has an esp boot button. Is that what I hold when doing betaflight pass through or should I try the separate board boot button?

[slender gorge]

but you are in windows?

[slender gorge]

you want the ESP boot button

[mighty glacier]

Darn, that’s what I’ve been doing with no luck.
Here’s what happens if I choose the user

[mighty glacier]

If I go into program files here’s the expresslrs folder

[slender gorge]

copy the file structure:
C:\Users\Jairu\AppData\Roaming\ExpressLRS Configurator\firmwares\cloud

paste it into an explorer window, address bar

[mighty glacier]

Deleted! Now should I attempt using the web flasher and do Betaflight pass through?

[slender gorge]

try with the configurator again..

[mighty glacier]

It successfully updated! It creates the web page again but will not bind to controller. Transmitter has same bind phrase and is in 3.00 or 3.01 I believe

[slender gorge]

post a screenshot of the transmitter's webUI options tab please

[slender gorge]

put the TX into wifi mode, connect and load the WebUI and post a screenshot of the Options tab from that WebUI

[mighty glacier]

When I go to WiFi connectivity-enable wif it says WiFi running but nothing comes up?
I would think the module is messed up but have another whoop that binds right up

[slender gorge]

did you set it up with your local wifi credentials?

these parameters.. did you set these?

[mighty glacier]

When I set up the tx or the rx? I did not when I set up the rx

[slender gorge]

we're talking about the TX that isn't showing up as an Access Point..

[mighty glacier]

I’m not sure, is there a way to check or not without reflashing?

[slender gorge]

turn off your router.. the tx will then be forced to start the access point.. see if it comes up..
then connect and load the webUI.. go into the wifi tab and Forget Local Network
save
then go back to the Options Tab, take a screenshot and post here

[mighty glacier]

@slender gorge

[mighty glacier]

@slender gorge please don’t give up on me 😢

[slender gorge]

have you tweaked Wifi Tab and forgot the Local wifi?

[mighty glacier]

Yes!

[slender gorge]

on the receiver, increase the wifi interval.. set it back to 60

does your TX work with your other receivers?

based on the UID numbers, which match, they should be bound already..

[mighty glacier]

I set it back to 60 but still no luck. Yes my tx binds to another whoop running the same board. It says “rx failsafe” in betaflight as a flag but when I put on goggles it doesn’t have “no rx found” message or anything

[slender gorge]

with the receiver powered up, and the lua script loaded on the radio, post a screenshot/photo (of the Lua Script)

[slender gorge]

could you post a screenshot of the betaflight configurator, receiver tab please.. and ports tab

the receiver is NOT in wifi mode, yes?

[mighty glacier]

No, it continues to go into Wi-Fi mode

[slender gorge]

it does blink slow at first? then blinks fast?

[mighty glacier]

It never does the fast blink. It just does like 1 second blinks then goes into WiFi. One sec I’ll send a vid

[slender gorge]

fast blinks is what indicates wifi mode

unless you're looking at the wrong LED

[slender gorge]

could you post a full screenshot of the receiver tab please

[mighty glacier]

No matter how long I plug it in, it never goes into that fast blink WiFi mode I’ve seen but still goes into WiFi mode?

[slender gorge]

could you reflash via passthrough with the option Erase Before Flash..

post the log should it stop on Erasing... (or whatever)

[mighty glacier]

Betaflight was closed

lol oh no, dead rx?

[slender gorge]

unplug..
press the esp boot button, then replug and try again..

or first disable Telemetry in betaflight, save and reboot, unplug usb, press and hold the esp boot button, then replug and try again

[slender gorge]

redo it WITHOUT the Erase Before Flash option

[slender gorge]

and does it work now with your tx module? unless of course you changed the binding phrase, either accidentally or deliberately

[mighty glacier]

@slender gorge same blinking pattern, when I check rx web site everything looks normal but still no luck

[slender gorge]

UID is the same still?

matching with the TX?

[mighty glacier]

No, still won’t connect to tx. I use the same bind phrase as on tx, it’s the only one I use on all tx and rxs

Model match is off on both

[slender gorge]

it never did connect with your tx?

[mighty glacier]

No, I ensured the tx was on first and everything. I have this one thing on the options. Should I try a different target or a different elrs version?

[slender gorge]

that's the correct target though

feel free to try 3.3.2

[mighty glacier]

Pass through method?

[slender gorge]

your call..

[mighty glacier]

Historically when I try Wi-Fi method it likes bricks it. I’ll try pass through again

[slender gorge]

if that still doesn't work, consider returning the item, ask for a refund or replacement.
if seller won't cooperate, go directly to Happymodel..
send them my regards

[mighty glacier]

Updated but still won’t connect. Although it’s flashing and updating, could there be something wrong with the chip?

[slender gorge]

is the antenna still intact and undamaged? though it should in theory still connect

[mighty glacier]

Thanks for your help man! Sorry I sent you on a wild goose chase

[mighty glacier]

Yes!

[slender gorge]

I could've also suggested wiring an external receiver into uart 2, but I can't see any way to disconnect that onboard receiver

if you have a hot air station, you could lift off that esp chip from the board

[mighty glacier]

I was considering adding an external and using it as a uwl build. You think it won’t work though bc the onboard will interfere?

[slender gorge]

yes.. there is a chance that onboard one will interfere

[mighty glacier]

Darn it! Hot air rework is a little over my head, but I appreciate the suggestion!

[mighty glacier]

Again, thanks for your help and sorry for taking up so much of your time! I’ll be sure to get you 2 cups of coffee for your fund for the effort!

[slender gorge]

that's okay..
I should even apologize for not responding right away..

[mighty glacier]

No apologies necessary man, I appreciate the help and I’m happy to buy you some coffees! Thanks for all you do for the community ❤️