Bpi-r4 mt7996e dBm limited

thuck · January 2, 2025, 1:53pm

Trying to setup my bpi-r4 with the mt7996e board and I noticed that the signal was pretty week on certain points of the house. Checking the txpower and I noticed that the max is 7.0 dBm.
Looking at my other openwrt router and the dBm is set to 20.
Does anybody knows if this is a limitation on the driver or if I have a misconfiguration somewhere?

iw list|grep -i dbm

			* 5180.0 MHz [36] (7.0 dBm)
			* 5200.0 MHz [40] (7.0 dBm)
			* 5220.0 MHz [44] (7.0 dBm)
			* 5240.0 MHz [48] (7.0 dBm)
			* 5260.0 MHz [52] (7.0 dBm) (radar detection)
			* 5280.0 MHz [56] (7.0 dBm) (radar detection)
			* 5300.0 MHz [60] (7.0 dBm) (radar detection)
			* 5320.0 MHz [64] (7.0 dBm) (radar detection)
			* 5500.0 MHz [100] (7.0 dBm) (radar detection)
			* 5520.0 MHz [104] (7.0 dBm) (radar detection)
			* 5540.0 MHz [108] (7.0 dBm) (radar detection)
			* 5560.0 MHz [112] (7.0 dBm) (radar detection)
			* 5580.0 MHz [116] (7.0 dBm) (radar detection)
			* 5600.0 MHz [120] (7.0 dBm) (radar detection)
			* 5620.0 MHz [124] (7.0 dBm) (radar detection)
			* 5640.0 MHz [128] (7.0 dBm) (radar detection)
			* 5660.0 MHz [132] (7.0 dBm) (radar detection)
			* 5680.0 MHz [136] (7.0 dBm) (radar detection)
			* 5700.0 MHz [140] (7.0 dBm) (radar detection)
			* 5720.0 MHz [144] (7.0 dBm) (radar detection)
			* 5745.0 MHz [149] (7.0 dBm)
			* 5765.0 MHz [153] (7.0 dBm)
			* 5785.0 MHz [157] (7.0 dBm)
			* 5805.0 MHz [161] (7.0 dBm)
			* 5825.0 MHz [165] (7.0 dBm)
			* 5845.0 MHz [169] (7.0 dBm) (no IR)
			* 5865.0 MHz [173] (7.0 dBm) (no IR)
			* 5885.0 MHz [177] (7.0 dBm) (no IR)

pmarques · January 4, 2025, 5:33pm

I have the same issue with the radio 0 and 1 (2.4Ghz and 5GHz)

thuck · January 6, 2025, 1:00pm

Yep, it's same case for me. both 2.4 and 5 have weak signal, max at 7dBm.

SpectreDev · January 6, 2025, 1:10pm

No, My 2.4ghz is 20dBm, 5ghz is 26dBm and 6ghz is 23dBm

thuck · January 6, 2025, 1:29pm

Could paste your output? And the openwrt version that you are using?

SpectreDev · January 6, 2025, 3:20pm

BusyBox v1.36.1 (2024-12-23 00:55:35 UTC) built-in shell (ash)

| |.-----.-----.-----.| | | |.----.| |_
| - || _ | -| || | | || || |
|___|| |||||_||| |____|
|| W I R E L E S S F R E E D O M

OpenWrt 24.10.0-rc4, r28211-d55754ce0d

root@bpi:~# iw list|grep -i dbm
* 2412.0 MHz [1] (20.0 dBm)
* 2417.0 MHz [2] (20.0 dBm)
* 2422.0 MHz [3] (20.0 dBm)
* 2427.0 MHz [4] (20.0 dBm)
* 2432.0 MHz [5] (20.0 dBm)
* 2437.0 MHz [6] (20.0 dBm)
* 2442.0 MHz [7] (20.0 dBm)
* 2447.0 MHz [8] (20.0 dBm)
* 2452.0 MHz [9] (20.0 dBm)
* 2457.0 MHz [10] (20.0 dBm)
* 2462.0 MHz [11] (20.0 dBm)
* 2467.0 MHz [12] (20.0 dBm)
* 2472.0 MHz [13] (20.0 dBm)
* 5180.0 MHz [36] (23.0 dBm)
* 5200.0 MHz [40] (23.0 dBm)
* 5220.0 MHz [44] (23.0 dBm)
* 5240.0 MHz [48] (23.0 dBm)
* 5260.0 MHz [52] (20.0 dBm) (radar detection)
* 5280.0 MHz [56] (20.0 dBm) (radar detection)
* 5300.0 MHz [60] (20.0 dBm) (radar detection)
* 5320.0 MHz [64] (20.0 dBm) (radar detection)
* 5500.0 MHz [100] (26.0 dBm) (radar detection)
* 5520.0 MHz [104] (26.0 dBm) (radar detection)
* 5540.0 MHz [108] (26.0 dBm) (radar detection)
* 5560.0 MHz [112] (26.0 dBm) (radar detection)
* 5580.0 MHz [116] (26.0 dBm) (radar detection)
* 5600.0 MHz [120] (26.0 dBm) (radar detection)
* 5620.0 MHz [124] (26.0 dBm) (radar detection)
* 5640.0 MHz [128] (26.0 dBm) (radar detection)
* 5660.0 MHz [132] (26.0 dBm) (radar detection)
* 5680.0 MHz [136] (26.0 dBm) (radar detection)
* 5700.0 MHz [140] (26.0 dBm) (radar detection)
* 5720.0 MHz [144] (26.0 dBm) (radar detection)
* 5745.0 MHz [149] (23.0 dBm)
* 5765.0 MHz [153] (23.0 dBm)
* 5785.0 MHz [157] (23.0 dBm)
* 5805.0 MHz [161] (23.0 dBm)
* 5825.0 MHz [165] (23.0 dBm)
* 5955.0 MHz [1] (23.0 dBm)
* 5975.0 MHz [5] (23.0 dBm)
* 5995.0 MHz [9] (23.0 dBm)
* 6015.0 MHz [13] (23.0 dBm)
* 6035.0 MHz [17] (23.0 dBm)
* 6055.0 MHz [21] (23.0 dBm)
* 6075.0 MHz [25] (23.0 dBm)
* 6095.0 MHz [29] (23.0 dBm)
* 6115.0 MHz [33] (23.0 dBm)
* 6135.0 MHz [37] (23.0 dBm)
* 6155.0 MHz [41] (23.0 dBm)
* 6175.0 MHz [45] (23.0 dBm)
* 6195.0 MHz [49] (23.0 dBm)
* 6215.0 MHz [53] (23.0 dBm)
* 6235.0 MHz [57] (23.0 dBm)
* 6255.0 MHz [61] (23.0 dBm)
* 6275.0 MHz [65] (23.0 dBm)
* 6295.0 MHz [69] (23.0 dBm)
* 6315.0 MHz [73] (23.0 dBm)
* 6335.0 MHz [77] (23.0 dBm)
* 6355.0 MHz [81] (23.0 dBm)
* 6375.0 MHz [85] (23.0 dBm)
* 6395.0 MHz [89] (23.0 dBm)
* 6415.0 MHz [93] (23.0 dBm)
root@bpi:~#

24.10rc4

thuck · January 7, 2025, 12:01pm

are you using a specific country on your configuration?

SpectreDev · January 7, 2025, 2:05pm

GB is what I'm using since it's where I live

thuck · January 9, 2025, 4:43pm

github.com/openwrt/openwrt

wifi txpower value is very low

opened 01:30PM - 05 Jan 25 UTC

ef1f

target/mediatek bug Official Image release/24.10

[dmesg.txt](https://github.com/user-attachments/files/18356766/dmesg.txt) [fw_p…rintenv.txt](https://github.com/user-attachments/files/18356768/fw_printenv.txt) ### Describe the bug wifi txpower value is very low. Selecting a country code does not affect the current txpower phy0.0-ap0 ESSID: "OpenWrt" Access Point: A6:80:59:35:05:EE Mode: Master Channel: 6 (2.437 GHz) HT Mode: HE40 Center Channel 1: 8 2: unknown Tx-Power: 6 dBm Link Quality: unknown/70 Signal: unknown Noise: -83 dBm Bit Rate: unknown Encryption: WPA3 SAE (CCMP) Type: nl80211 HW Mode(s): 802.11ac/ax/b/be/g/n Hardware: 14C3:7990 14C3:6639 [MediaTek MT7996E] TX power offset: none Frequency offset: none Supports VAPs: yes PHY name: phy0 phy0.1-ap0 ESSID: "OpenWrt" Access Point: A6:80:59:35:05:FE Mode: Master Channel: 36 (5.180 GHz) HT Mode: HE160 Center Channel 1: 50 2: unknown Tx-Power: 7 dBm Link Quality: unknown/70 Signal: unknown Noise: -83 dBm Bit Rate: unknown Encryption: WPA3 SAE (CCMP) Type: nl80211 HW Mode(s): 802.11ac/ax/b/be/g/n Hardware: 14C3:7990 14C3:6639 [MediaTek MT7996E] TX power offset: none Frequency offset: none Supports VAPs: yes PHY name: phy0 phy0.2-ap0 ESSID: "OpenWrt" Access Point: A6:80:59:35:25:0E Mode: Master Channel: 53 (6.215 GHz) HT Mode: HE160 Center Channel 1: 47 2: unknown Tx-Power: 20 dBm Link Quality: unknown/70 Signal: unknown Noise: -83 dBm Bit Rate: unknown Encryption: WPA3 SAE (CCMP) Type: nl80211 HW Mode(s): 802.11ac/ax/b/be/g/n Hardware: 14C3:7990 14C3:6639 [MediaTek MT7996E] TX power offset: none Frequency offset: none Supports VAPs: yes PHY name: phy0 root@OpenWrt:~# iwinfo phy0.0-ap0 txpowerlist 0 dBm ( 1 mW) 1 dBm ( 1 mW) 2 dBm ( 1 mW) 3 dBm ( 1 mW) 4 dBm ( 2 mW) 5 dBm ( 3 mW) * 6 dBm ( 3 mW) root@OpenWrt:~# iwinfo phy0.1-ap0 txpowerlist 0 dBm ( 1 mW) 1 dBm ( 1 mW) 2 dBm ( 1 mW) 3 dBm ( 1 mW) 4 dBm ( 2 mW) 5 dBm ( 3 mW) 6 dBm ( 3 mW) * 7 dBm ( 5 mW) root@OpenWrt:~# iwinfo phy0.2-ap0 txpowerlist 255 dBm (2147483647 mW) ### OpenWrt version r28211-d55754ce0d ### OpenWrt release 24.10.0-rc4 ### OpenWrt target/subtarget mediatek/filogic ### Device Bananapi BPI-R4 ### Image kind Official downloaded image ### Steps to reproduce _No response_ ### Actual behaviour _No response_ ### Expected behaviour _No response_ ### Additional info _No response_ ### Diffconfig _No response_ ### Terms - [X] I am reporting an issue for OpenWrt, not an unsupported fork.

pmarques · January 11, 2025, 5:41pm

There is also this thread in the BananaPI Forum but still no idea what is happening

Bpi-r4 mt7996e dBm limited

| |.-----.-----.-----.| | | |.----.| |_ | - || _ | -| || | | || || | |_____|| |||||___||| |____| || W I R E L E S S F R E E D O M

OpenWrt 24.10.0-rc4, r28211-d55754ce0d

| |.-----.-----.-----.| | | |.----.| |_
| - || _ | -| || | | || || |
|___|| |||||_||| |____|
|| W I R E L E S S F R E E D O M