RSSI problem in Mesh MM6108

General
1

I have a mesh with multiple nodes MM6108 devices, connected to a Raspberry Pi and a antenna FXP280 868 Mhz from TAOGLAS.

The mesh si working well so far (MorseMicro kernel with SPI driver), no power save.

My RSSI of all devices is very very bad, the maximum distance between nodes is 20 meters!
There are quite a lot config files or statistics so feel free to ask me more details if necessary.

Driver config : options morse bcf=arfhl_d1164_bcf_mf10220_eu_v3.bin debug_mask=8 country=EU

One node :

pi@raspberrypi:~ $ sudo iw dev wlan0 station dump
Station 00:0a:52:0d:ef:ac (on wlan0)
inactive time: 28 ms
rx bytes: 338983
rx packets: 1666
tx bytes: 399655
tx packets: 974
tx retries: 713
tx failed: 14
rx drop misc: 467
signal: -90 dBm
signal avg: -90 dBm
Toffset: 160578491 us
tx bitrate: 28.9 MBit/s VHT-MCS 3 short GI VHT-NSS 1
tx duration: 0 us
rx bitrate: 52.0 MBit/s VHT-MCS 5 VHT-NSS 1
rx duration: 0 us
expected throughput: 1.301Mbps
mesh llid: 0
mesh plid: 0
mesh plink: ESTAB
mesh airtime link metric: 5852
mesh connected to gate: no
mesh connected to auth server: no
mesh local PS mode: ACTIVE
mesh peer PS mode: ACTIVE
mesh non-peer PS mode: ACTIVE
authorized: yes
authenticated: yes
associated: yes
preamble: long
WMM/WME: yes
MFP: yes
TDLS peer: no
DTIM period: 1
beacon interval:1000
connected time: 366 seconds
associated at [boottime]: 28.665s
associated at: 1781278245874 ms
current time: 1781278597056 ms

WPA Supplicant :


ctrl_interface=/var/run/wpa_supplicant_s1g
ctrl_interface_group=0
update_config=1
country=EU

PMF / SAE - requis pour HaLow mesh

sae_pwe=1

Parametres mesh globaux

max_peer_links=10
mesh_fwding=1

network={
ssid="MorseMeshNet"
country="EU"

# --- Mode Mesh 802.11s ---
mode=5

# --- Canal S1G (doit etre IDENTIQUE sur tous les noeuds) ---
# On reste coherent avec le setup AP/STA EU existant : channel 9 / op_class 66 (1 MHz)
channel=9
op_class=66
s1g_prim_chwidth=0
s1g_prim_1mhz_chan_index=0

# --- Securite WPA3-SAE ---
key_mgmt=SAE
sae_password="12345678"
pairwise=CCMP
group=CCMP
proto=RSN
ieee80211w=2

# --- Parametres mesh recommandes par Morse Micro / Gateworks ---
beacon_int=1000
# dtim_period=1 requis par wpa_supplicant/mesh.c (>= 1.16.x)
dtim_period=1
# Seuil RSSI de peering : ignore les voisins trop faibles
mesh_rssi_threshold=-85

}

We are stuck, the distance is so low that we have a BIG hardware or software flaw. Can you point me out some ideas?

Thank you!

2

If the issue is not hardware, a common source of bad RSSI is using the wrong BCF file. This could be the wrong file for your firmware verison, the wrong file for your module, or modifications to the file that have negatively impacted the performance.

Could you provide details of your MM6108 module/board? Also what version of driver + firmware are you using? One of my colleagues can then jump in and let you know if the BCF is right

1 Like
3

We use this: https://asiarf.com/product/wi-fi-halow-sub-ghz-wireless-module-2-mm6108-mm610x-001/

Kernel : rpi-6.12.21/1.16.x
Driver : 1.16.4

COmpiled with make MORSE_TRACE_PATH=ā€˜/home/pĆ®/morse_driver/ā€™ ARCH=arm64 KERNEL_SRC=~/rpi-linux CONFIG_WLAN_VENDOR_MORSE=m CONFIG_MORSE_SDIO=n CONFIG_MORSE_USER_ACCESS=y CONFIG_MORSE_SPI=y CONFIG_MORSE_VENDOR_COMMAND=y

BCF:

pi@raspberrypi:~ $ cat /etc/modprobe.d/morse.conf
options morse bcf=arfhl_d1164_bcf_mf10220_eu_v3.bin debug_mask=8 country=EU

If you need more information feel free to ask! Thank you in advance, everything works so far (fixed IP for all devices, no AP).

4

That looks like the correct BCF file for an EU-spec AsiaRF module.
One thing that might cause low RSSIs like that is attempting to operate a US-spec module on EU channels. Many MM6108-based modules have internal filters that are specific to the channels available in different regions, and I note that AsiaRF does offer three versions of this module.
If this is the EU version, Iā€™d contact AsiaRF, as I suspect this is a hardware issue.

5

IMG_20260619_103333
IMG_20260619_1033331057Ɨ1256 121 KB

Here is the module we use exactly to be sure!