Test report on the operation of Mediatek WiFi 6 DBDC miniPCIe Wi-Fi modules AW7915-NPD by 524wifi.com

For our report we have used Wi-Fi 6 DBDC (Dual Band Dual Concurrent) miniPCIe module: 524wifi.com-AW7915-NPD ( Mediatek MT7915DAN chipset )

Installed into 7 buses, Setra 516 and MAN Lion Coach types, operation length 3 months. Application  - dual band wifi for passengers.

Setra 516: Length 13.1 m, width, seat amount 55                                                                              MAN Lion Coach: Length 12.1m, width, seat amount 53

Used antennas:

SENCITY® Omni-SR (1399.35.0002)

Huber & Suhner OmPlecs®-TOP 90 RAIL WiFi 2.4-5.8 (100-57-61-02.4) Antonics

Installation method:

Dual band antenna SENCITY® Omni-SR is installed in the front of the bus and above rear door

Used HW platform

Intel i5-6442EQ, 1.9/2.7GHz, 8GB or 16 GB RAM

Intel i7-6822EQ, 2.0/2.8 GHz, 8GB or 16 GB RAM

Intel I5-4300U, Dual core 1.9Ghz, 8GB RAM

Intel Celeron J1900 Quad-Core 2 Ghz, 8GB RAM



Used Linux distribution:

Debian (bullseye-backports) linux-image-amd64, verze 5.15.0-0.bpo.2-amd64, that corresponds to vanilla kernel 5.15.5.

Latest Kernel version also work well - tested for new installation
Please take note - there is no module firmware inside of the module.  You need to compile the driver again after your Linux kernel update!

We have also concluded the tests using the ARM based board and were able to get around 800 Mbit/s with an MCS between 10 and 11 (1020.8 to 1134.3 Mbit/s). This board runs Ubuntu 20.04.4 LTS with a compiled kernel.

You can also use OpenWRT, these modules are supported in OpenWRT version 21 and newer - In OPENWRT you need to set up read RF parameters from eFuse. Kindly be noted.

OpenWRT drivers - GITHUB - https://github.com/openwrt/mt76/tree/master/mt7915   (for MT7916 modules you can use same driver)

OpenWRT system tested on Wallys DR4029 board with QCA IPQ4019 processor  

OpenWRT porting guide example - read here

Firmware:

mt7915_rom_patch.bin

HW/SW Version: 0x8a108a10, Build Time: 20201105222230a

mt7915_wm.bin

WM Firmware Version: ____000000, Build Time: 20201105222304

mt7915_wa.bin

WA Firmware Version: DEV_000000, Build Time: 20201105222323

(Posted on 1/20/2022  -  Latest Kernel version also work well - tested for new installation)

Measuring the signal strength in the bus

2.4 GHz antenna Huber & Suhner in the middle of the bus + 524wifi.com-AW7915-NPD