morrownr
commented
1 year ago Hi @da-mkay
Cool. Time to play with a Pi.
Main Menu item 8 is about AP mode. The main document provides example hostapd.conf files and tested settings for many options. For the mt7612u based adapters, it recommends:
ht_capab=[HT40+][HT40-][GF][SHORT-GI-20][SHORT-GI-40]
I think your ht_capab line is including some items that are not supported with the ACM. It is very important to get the ht_capab and vht_capab lines right. I can show you how to determine the right settings for any specific adapter if you like.
require_ht=1
I've never seen that setting do anything but cause problems.
# Enables support for 5GHz DFS channels (requires ieee80211d=1)
ieee80211h=1This is only needed if you are going to support DFS channels... of which, there are none for the 2.4 GHz band.
ap_isolate=1
Do you need this?
Well, instead of going over various lines, let me post the example for 2.4 I have in the document I posted about above:
# /etc/hostapd/hostapd-2g.conf
# Documentation: https://w1.fi/cgit/hostap/plain/hostapd/hostapd.conf
# 2022-08-08
# SSID
ssid=myPI-2g
# PASSPHRASE
wpa_passphrase=myPW1234
# Band: a = 5g (a/n/ac), g = 2g (b/g/n)
hw_mode=g
# Channel
channel=6
# Country code
country_code=US
# Bridge interface
bridge=br0
# WiFi interface
interface=wlan1
# nl80211 is used with all Linux mac80211 (in-kernel) and modern Realtek drivers
driver=nl80211
#ctrl_interface=/var/run/hostapd
#ctrl_interface_group=0
beacon_int=100
dtim_period=2
max_num_sta=32
rts_threshold=2347
fragm_threshold=2346
#send_probe_response=1
# security
# auth_algs=3 is required for WPA3-SAE and WPA3-SAE Transition mode
auth_algs=1
macaddr_acl=0
ignore_broadcast_ssid=0
wpa=2
wpa_pairwise=CCMP
# WPA2-AES
wpa_key_mgmt=WPA-PSK
# WPA3-SAE
#wpa_key_mgmt=SAE
#wpa_group_rekey=1800
rsn_pairwise=CCMP
# ieee80211w=2 is required for WPA3-SAE
#ieee80211w=2
# If parameter is not set, 19 is the default value.
#sae_groups=19 20 21 25 26
#sae_require_mfp=1
# If parameter is not 9 set, 5 is the default value.
#sae_anti_clogging_threshold=10
# IEEE 802.11n
ieee80211n=1
wmm_enabled=1
#
# Note: Only one ht_capab= line should be active. The content of these lines is
# determined by the capabilities of your adapter.
#
# generic 20 MHz setting
ht_capab=[SHORT-GI-20]
#
# generic 40 MHz setting
#ht_capab=[HT40+][HT40-][SHORT-GI-20][SHORT-GI-40]
#
# RasPi4B internal wifi
#ht_capab=[HT40+][HT40-][SHORT-GI-20][SHORT-GI-40][DSSS_CCK-40]
#
# rt5370 - rt3070
#ht_capab=[HT40+][HT40-][GF][SHORT-GI-20][SHORT-GI-40][RX-STBC1]
#
# ar9271
#ht_capab=[HT40+][HT40-][SHORT-GI-20][SHORT-GI-40][RX-STBC1][DSSS_CCK-40]
#
# mt7612u - mt7610u
#ht_capab=[HT40+][HT40-][GF][SHORT-GI-20][SHORT-GI-40]
#
# rtl8812au - rtl8811au - rtl8812bu - rtl8811cu
#ht_capab=[HT40+][HT40-][SHORT-GI-20][SHORT-GI-40][MAX-AMSDU-7935]
# rtl8814au
#ht_capab=[LDPC][HT40+][HT40-][SHORT-GI-20][SHORT-GI-40][MAX-AMSDU-7935][DSSS_CCK-40]
# End of hostapd-2g.conf
There could be other causes but let's get hostapd.conf lined out and if it is not rock solid, we can continue.
Cheers,
@morrownr
da-mkay
bjlockie
ZerBea
Hi,
I set up a 2,4 GHz AP using a Raspberry Pi 4B and an ALFA AWUS036ACM. Besides the USB Stick (plugged into a USB2 port) only LAN and USB-C (for power) is connected. iperf3 measures around 941 mbps from The RPi4 via LAN to a Linux-Server in the same LAN. A client connected to the AP measures 90-100 mbps to that same server using iperf3. That’s enough as I just want to fully utilise my 100 mbps internet connection. An internet speed test measures 85 to 90 mbps. That‘s ok.
Now to the problem: I have 3 devices connected to the AP: One MacBook Pro 2013, one MacBook Pro 2022 and one iPhone 14 Pro. For testing purpose I ran a download on the MacBooks in an infinite loop using curl and start a download from the iPhone manually as well in parallel. I always see the same picture:
Unfortunately nothing was logged by hostpd when downloads failed on MacBook Pro. I saw some „disassociated“ logs for the iPhone, but after adjusting some hostapd settings and looking at the logs as soon as the download hung on the iPhone, I saw that nothing was logged for the iPhone. Since the ALFA AWUS036ACM is advertised here as highly recommended, I wonder if someone has similar issues. Previously I had a Fritz AC 860, which had similar issues. Even worse: there I experienced those freezes even on the MBP 2013, so that I had to reconnect. One time, I even had to reboot the RPi, because WiFi AP was not working at all anymore. I already tried different USB Ports, even USB3 with disable_usb_sg, but this did not help and speed was worse. I also tried different hostapd settings, see below.
OS: Raspberry Pi OS Lite (64-bit) - 2023-05-03
hostapd config:
onboard WiFi is disabled.