PhilE
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
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CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Mon Nov 23, 2020 5:41 pm

This topic is for feedback about the new CYW43455 firmware release from Cypress, announced here: viewtopic.php?f=117&t=292113

milnepe
Posts: 7
Joined: Fri Jun 12, 2020 4:54 pm

Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Mon Nov 23, 2020 6:42 pm

This has fixed the connection issue with my SiLabs Thunderboards that I raised as https://github.com/raspberrypi/linux/issues/3689 Thanks :D

drgeoff
Posts: 12410
Joined: Wed Jan 25, 2012 6:39 pm

Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Mon Nov 23, 2020 6:55 pm

Aren't the 43455 files also applicable to the 3A+?
Quis custodiet ipsos custodes?

PhilE
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
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Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Mon Nov 23, 2020 7:25 pm

Yes - the two parts are identical in that regard (and most others).

thradtke
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Location: Germany / EL

Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Tue Dec 22, 2020 7:38 am

Can/should it be installed on a 400? Or will it be available through updating the Pi?
Rocket Scientist.

PhilE
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
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Location: Cambridge

Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Tue Dec 22, 2020 9:20 am

The Pi400 uses a sister part to the CYW43455 - the BCM43456 - which is already running different firmware (called "BCM4345C5.hcd").

xlla
Posts: 12
Joined: Tue Jul 23, 2019 4:20 pm

Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Fri Dec 25, 2020 11:19 am

After apply this new firmware, my wifi connection will drop random.
Pi4 4GB, rev 1.2.

orsobianco
Posts: 4
Joined: Wed Dec 30, 2020 8:50 pm

Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Wed Dec 30, 2020 8:59 pm

report this error
sudo cp BCM4345C0_003.001.025.0171.0339.hcd /lib/firmware/brcm/BCM4345C0.hcd
cp: unable to stat of 'BCM4345C0_003.001.025.0171.0339.hcd': File or directory does not exist
raspberry 4b
[translated from italian by moderator]

PhilE
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 4259
Joined: Mon Sep 29, 2014 1:07 pm
Location: Cambridge

Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Fri Jan 01, 2021 3:04 pm

The instructions assume that you know how to find the file you've downloaded. If you are unable to do this then you would be unwise to run the trial firmware.

This firmware is now installed by default - you can update with:

Code: Select all

$ sudo apt update
$ sudo apt install bluez-firmware

heliaca
Posts: 3
Joined: Tue Jan 12, 2021 10:09 pm

Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Wed Jan 13, 2021 12:10 am

hello sorry for bad english
i dont know about this firmware but i have raspberry pi last 2 months and i use last days usb and i see the bluetooth problem
when you use USB3.0 the bluetooth and wifi ranger is smaller for example the bluetooth search max 1m-2m .
for wifi i dont care because i use only LAN but for bluetooth is big problem any solution ?

PhilE
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
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Location: Cambridge

Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Wed Jan 13, 2021 10:16 am

It is unfortunate that Bluetooth, 2.4G WiFi and USB3 all occupy the same frequency band, but there is little that can be done except disable any that you aren't using. Have you disabled WiFi? You can use the icon in the status bar, or from the command line it's "rfkill block wifi".

heliaca
Posts: 3
Joined: Tue Jan 12, 2021 10:09 pm

Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Wed Jan 13, 2021 4:08 pm

hello Phile thnx for answer i try

sudo nano /boot/config.txt
dtoverlay=disable-wifi

and again if i use usb3.0 the bluetooth not scan correct.

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algorithm
Posts: 273
Joined: Mon Nov 25, 2013 9:09 pm
Location: Flatland

Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Mon Jan 25, 2021 8:58 am

I see this info about bluez-firmware. Does this mean that the leaseweb mirror is out of date, again? But the +rpt7 version *is* the one that's installed. Is that one the subject of this thread?

Code: Select all

$ apt-cache madison bluez-firmware
bluez-firmware | 1.2-3+rpt7 | http://archive.raspberrypi.org/debian stretch/main armhf Packages
bluez-firmware |      1.2-3 | http://mirror.nl.leaseweb.net/raspbian/raspbian stretch/non-free armhf Packages

PhilE
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
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Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Mon Jan 25, 2021 9:31 am

Yes, that's the latest release - this thread is two months old now.

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algorithm
Posts: 273
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Location: Flatland

Re: CYW43455 (3B+, 4B, CM4) Bluetooth feedback thread

Mon Jan 25, 2021 11:51 am

Sure, thanks. I figured it would be out of beta so mainly wondered if 1.2-3+rpt7 was even newer. And I thought it was strange that a similar 1.2-3 version was lurking about on a mirror.

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