Thanks to betepok, Kiel and moneyrain postes I was able to tune WiFi in my OrangePi 3+. but according to my dmesg I have:
cp /lib/firmware/rkwifi/fw_bcm43456c5_ag.bin /lib/firmware/brcm/brcmfmac43455-sdio.bin
cp /lib/firmware/rkwifi/nvram_ap6256.txt /lib/firmware/brcm/brcmfmac43455-sdio.xunlong,orangepi-3.txt
Thanks to all.