BPI-R3 randomly restarts

Banana Pi Router design BPI-R3/R3 Mini(MT7986)
1

It restarts randomly since I bought it! My main router is a BP-R2, and I never use it as production, so it hasn’t bothered me up to this point, and hoped the next release of Openwrt would fix it.

I suspect something related to the wifi, but I can not prove it due to missing log files. With usb to uart cable wifi doesn’t bring up at boot.

What do you recommend to bring the device to stable state?

OS is OpenWrt 23.05.5 r24106-10cc5fcd00 / LuCI openwrt-23.05 branch git-24.364.71483-75d2b84, installed on emmc.

2

Use a FT232RL usb uart, it can boot and use wifi.

3

Have you ever experienced the same problem as me?

4

But you are right :

cp210x converter detected

5

I was able to write some logs :

> 
> [  
> F0: 102B 0000
> FA: 1040 0000
> FA: 1040 0000 [0200]
> F9: 103F 0000
> F3: 1006 0033 [0200]
> F3: 4001 00E0 [0200]
> F3: 0000 0000
> V0: 0000 0000 [0001]
> 00: 0000 0000
> BP: 2400 0041 [0000]
> G0: 1190 0000
> EC: 0000 0000 [2000]
> T0: 0000 0217 [010F]
> Jump to BL
> 
> NOTICE:  BL2: v2.7(release):OpenWrt v2022-08-31-75393484-1 (mt7986-emmc-ddr4)
> NOTICE:  BL2: Built : 11:20:39, Jun 26 2023
> NOTICE:  WDT: disabled
> NOTICE:  CPU: MT7986 (2000MHz)
> NOTICE:  EMI: Using DDR4 settings
> NOTICE:  EMI: Detected DRAM size: 2048MB
> NOTICE:  EMI: complex R/W mem test passed
> NOTICE:  BL2: Booting BL31
> NOTICE:  BL31: v2.7(release):OpenWrt v2022-08-31-75393484-1 (mt7986-emmc-ddr4)
> NOTICE:  BL31: Built : 11:20:39, Jun 26 2023
> 
> 
> U-Boot 2023.04-OpenWrt-r23228-cd17d8df2a (Jun 26 2023 - 11:20:39 +0000)

After I connect via wifi, and prepare a wifi connection test on client, I get this.

6

I don’t use openwrt, so can’t help you there…

7

do you have crash logs in the /sys/fs/pstore?

8

Maybe check your power adapter…or change your sdcard if you boot from here.

9

Power adapter is ok, it boots from emmc…

10

No, it’s empty! Should it be activated?

11

Finally I’ve found the problem! It was tricky, cause I couldn’t believe it, but it was due to the power supply rated 12V 3A. Attached another one rated 2,5A but hevier, after 1 day it didn’t come back.

12

For these cheaper ‘LED’ power supplies, They can supply the nominal Amperage, but they are not stable enough for a development board roughly in the second half of the range. So I double the Amperage for these kind of power supplies.

DC Power 12V/2A with DC in

So for a minimum I always would use 4A to have a stable power supply at 2A. But if there are more accessories installed, like harddrive and such, I would even increase it more.

13

I absolutely agree with you! Could you recommend a trusty brand?

It’s hard to buy, cause you can not decide from picture wether it’s ok or not!

14

Last time I bought 12V 4A from here:

https://a.aliexpress.com/_EywaeeU

It powers a R3 with nvme (not a power hungry one). The enclosure is the same model as the 3A version.

1 Like