Radiofrequency Compliance Guidance

CE / FCC certification requires that the device's wireless signal operates at a specified frequency. This tutorial will guide you on how to set up Wi-Fi / Bluetooth for such test.

Install Configuration Tool

Please execute the following commands on the device to be certified:

# Disable the default brcmfmac driver.
echo "blacklist brcmfmac" >> /etc/modprobe.d/blacklist.conf
# Download the wl utility
sudo wget -O /usr/local/sbin/wl https://dl.radxa.com/fix_freq_docs/wl
sudo chmod +x /usr/local/sbin/wl
# Install armel dependencies
sudo dpkg --add-architecture armel
sudo apt update
sudo apt install libc6:armel

# The following tools are used for the rtl8723ds module
sudo wget -O /usr/local/sbin/rtwpriv https://dl.radxa.com/fix_freq_docs/rtwpriv
sudo wget -O /usr/local/sbin/rtlbtmp https://dl.radxa.com/fix_freq_docs/rtlbtmp
sudo chmod +x /usr/local/sbin/rtwpriv
sudo chmod +x /usr/local/sbin/rtlbtmp

Replace the specialized firmware

Please execute the following command on the device to be verified:

AP6256

sudo mv /lib/firmware/brcm/fw_bcm43456c5_ag.bin /lib/firmware/brcm/fw_bcm43456c5_ag.bin.bak
sudo wget -O /lib/firmware/brcm/fw_bcm43456c5_ag.bin https://dl.radxa.com/fix_freq_docs/ap6256/fw_bcm43456c5_ag_mfg.bin
reboot
sudo wl ver                 # The word WLTEST appears, indicating that the firmware replacement was successful.
sudo hcitool cmd 0x03 0x003 # No error, means Bluetooth is working.

AP6212

sudo mv /lib/firmware/brcm/fw_bcm43438a1.bin /lib/firmware/brcm/fw_bcm43438a1.bin.bak
sudo wget -O /lib/firmware/brcm/fw_bcm43438a1.bin https://dl.radxa.com/fix_freq_docs/ap6212/fw_bcm43438a1_mfg.bin
reboot
sudo wl ver                 # The word WLTEST appears, indicating that the firmware replacement was successful.
sudo hcitool cmd 0x03 0x003 # No error, means Bluetooth is working.

AW-CM256SM

sudo mv /lib/firmware/brcm/cyw43455.bin /lib/firmware/brcm/cyw43455.bin.bak
sudo wget -O /lib/firmware/brcm/cyw43455.bin hhttps://dl.radxa.com/fix_freq_docs/cm256/cyw43455-mfgtest-7.45.100.18.bin
reboot
sudo wl ver                 # The word WLTEST appears, indicating that the firmware replacement was successful.
sudo hcitool cmd 0x03 0x003 # No error, means Bluetooth is working.

RTL8723DS

sudo wget -O /lib/firmware/mp_rtl8723ds_config   https://dl.radxa.com/fix_freq_docs/rtl87123ds/mp_rtl8723ds_config
sudo wget -O /lib/firmware/mp_rtl8723d_fw       https://dl.radxa.com/fix_freq_docs/rtl87123ds/mp_rtl8723d_fw

reboot

The rtl8723ds-btfw-load.service service needs to be shut down before the bt fix can be performed

sudo systemctl stop rtl8723ds-btfw-load.service

Continue to complete the test

Please refer to the following documentation for testing:

Wi-Fi RF Test Commands for Linux-v05.pdf

BT+RF+Test+Commands+for+Linux-v07.pdf

RTL8723DS Please refer to the following documents for testing

Realtek_linuxFixed Frequency Instruction Guide.pdf

MP tool user guide for linux20181108.pdf

Caution

Bluetooth needs to be turned off when testing Wi-Fi:

sudo rfkill block bluetooth
sudo rfkill unblock wlan

Wi-Fi needs to be turned off when testing Bluetooth:

sudo rfkill block wlan
sudo rfkill unblock bluetooth