Tiny Core Base > Raspberry Pi

RasPi 3B - WiFi Not Detected

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Rich:
Hi CentralWare

--- Quote from: CentralWare on January 02, 2025, 11:13:15 AM --- ... Is there a kill switch (or enable switch) for brcmfmac that you know of ? ...
--- End quote ---
util-linux has the  rfkill  program that might be worth checking out:

--- Code: ---tc@E310:~/Scripting/AddressParser$ rfkill --help

Usage:
 rfkill [options] command [identifier ...]

Tool for enabling and disabling wireless devices.

Options:
 -J, --json             use JSON output format
 -n, --noheadings       don't print headings
 -o, --output <list>    define which output columns to use
 -r, --raw              use the raw output format

 -h, --help             display this help
 -V, --version          display version

Available output columns:
 DEVICE      kernel device name
 ID          device identifier value
 TYPE        device type name that can be used as identifier
 TYPE-DESC   device type description
 SOFT        status of software block
 HARD        status of hardware block

Commands:
 help
 event
 list   [identifier]
 block   identifier
 unblock identifier

For more details see rfkill(8).
--- End code ---

CentralWare:

--- Quote from: Paul_123 on January 02, 2025, 03:08:53 PM ---Obviously the firmware needs to be loaded first or in the same tce-load call.
--- End quote ---
My make-shift wireless script does all four in one tce-load call.
The onboot listing was firmware, then wireless-KERNEL then tools.

--- Quote ---...if you manually added dtoverlay=disable-wifi to your config.txt
--- End quote ---
Nah, everything's fresh/default and I looked for overlays before I posted just in case something was in config to en/disable wifi/bt and to familiarize myself with the 15.x layout

SD is a fresh 15.x where mmcblk0p1 is 1GB fat32 and tce resides on it just to make my life simpler. :)
onboot owns the show; wpa_supplicant is called via bootlocal with a wait loop allowing wireless to settle and wlan0 to become available; loads wpa_supplicant.conf - otherwise dmesg > logfile

Confirmed: RasPi 3B (A+/B+ untested thus far) does in fact go "wonky" without the broadcom entry in cmdline

Power supply is 90W 3.3/5/12 USB-C (supposedly regulated - but I never benched it to prove it) but will look into psu issues just in case.

** Sadly, I vaguely recall a board conversation (which I thought was here -- but can't be sure) regarding the Pi3 and the radios and a vague inkling that something ridiculous like I2C plus IPv6 or what have you being a prerequisite (back then) of getting wifi and/or bt to play nice...  but so much as changed since then it could only be hoped kernel patches/fixes went into the mix between then and now.  Then again, I also remember an overlay fix that was needed to create alias/range addresses on wireless (ie: wlan0:0) and a problem with bindings where if wlan0 was used as a fail-safe it would crash the driver when eth0 went down...  too many memory fragments...  no defrag!!!

Back in the day there was talk about 3A/B having the means to disable wifi/bt when Pi3B was still an infant -- haven't Googled to see if that's just something in config or a bit switch in what we'll nick-name RasBIOS.

@Rich: Yes, I vaguely remember the name! :)  Research notes updated for Manning and/or Googling as time permits.

Thanks guys; I appreciate the efforts!

Juanito:
I'm not sure if it's helpful, but wifi works on this RPi:
--- Code: ---cat /proc/cpuinfo | grep Model
Model: Raspberry Pi 3 Model B Rev 1.2
uname -a
Linux boxrpi3 6.6.47-piCore-v7 #20 SMP Sat Aug 31 14:54:55 EDT 2024 armv7l GNU/Linux
version
15.0
--- End code ---

..using:
--- Code: ---sudo cp /mnt/mmcblk0p2/conf/wpa_configure.conf /etc
#
tce-load -i firmware-rpi-wifi
tce-load -i wireless-KERNEL
tce-load -i wpa_supplicant
#
sleep 2
#
sudo wpa_supplicant -B -i wlan0 -c/etc/wpa_configure.conf
#
sudo udhcpc -b -i wlan0 -x hostname:boxrpi3 -p /var/run/udhcpc.wlan0.pid
--- End code ---

..and:
--- Code: ---cat wpa_configure.conf*

ctrl_interface=/var/run/wpa_supplicant

network={
        ssid="blah"
key_mgmt=WPA-PSK
proto=WPA2
pairwise=CCMP
group=CCMP
psk="blah-blah"
}
--- End code ---

CentralWare:
@Juanito: Thanks for dropping in!  3 Boards identical to yours, for completely unknown reasons, two of the three act as though the wifi/bt chip isn't even soldered on.

--- Code: ---sudo cp /mnt/mmcblk0p2/conf/wpa_configure.conf /etc
--- End code ---
I do this from /opt but otherwise same process

--- Code: ---tce-load -i firmware / wireless / wpa
--- End code ---
Same here - I even added iw, usbutils, pciutils, etc. the first time around and wireless just isn't there, either by chip number or brcm driver identifier.

It's possible (though I cannot imagine how!?) the boards were damaged...
okay, maybe not (see image attachment - wifi chip bottom left corner...  would be difficult to injure hiding along-side one of the DIN rail braces - while attached TO a DIN rail most of the time.)

Juanito:
Maybe the RPi OS has a test program?

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