Issues with SERCOMM NA502S (A1 Smart Home) and OpenWRT

dragoncraft · August 7, 2024, 11:42pm

Hello,

I have a SERCOMM NA502S (A1 Smart Home) hub. Since the A1 SmartHome service is discontinued, I want to repurpose the hub with OpenWRT.

Initially, I faced an issue where OpenWRT worked after installation, but I couldn’t access the device after a reboot (no ash over serial / no SSH). I tried various solutions from this forum without success.

Now, I have a new problem: after installing OpenWRT, I go to the webGUI LuCi -> System -> Backup / Flash Firmware -> Flash new firmware image. I upload the Sysupgrade file, but during the reboot, I get the following error message:

Uncompressing Kernel Image ... LZMA ERROR 1 - must RESET board to recover

I have tried the following Kernel files with their corresponding Sysupgrade files:

23.05.4
23.05.3
23.05.2
22.03.7 (The kernel installed, but when using the Sysupgrade file, I got an error message: “The device is supported, but the config is incompatible with the new image (1.1->1.0). Please upgrade without keeping config (sysupgrade -n). Image check failed.”)

I also tried the snapshot Kernel and Sysupgrade files.

i copied the whole loop down there

Any ideas what I am missing?

Please choose the operation:
   1: Load system code to SDRAM via TFTP.
   2: Load system code then write to Flash via TFTP.
   3: Boot system code via Flash (default).
   4: Entr boot command line interface.
   9: Load Boot Loader code then write to Flash via TFTP.
STANDALONE_LOAD_ADDR is 0xa1200000
..
******************************************
    Uboot StandAlone Entry
******************************************
                                                                            0

******************************************
    Uboot StandAlone Entry
******************************************

Flash Sector Number : 522.

***************************************************
    Sercomm Boot Version 2.00.6

***************************************************
Entering Firmware : Everything is OK.

=================================================
Check image validation:
Image1 Header Magic Number --> OK
Image2 Header Magic Number --> OK
Image1 Header Checksum --> OK
Image2 Header Checksum --> OK
Image1 Data Checksum --> ........................................................................................OK
Image2 Data Checksum --> ...........................................OK

Image1: OK Image2: OK

=================================================
..kernel addr :0xbfd40000

flash base: 0xbfc00000, kernel addr :0xbfd40000, bootloader size: 0x80000, config size 0x80000, fac size : 0x40000
..Erasing NAND Flash...
.Writing to NAND Flash...
done

3: System Boot system code via Flash.
## Booting image at bfd40000 ...
   Image Name:   MIPS OpenWrt Linux-5.15.162
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    5754115 Bytes =  5.5 MB
   Load Address: 80001000
   Entry Point:  80001000
........................................................................................   Verifying Checksum ... OK
   Uncompressing Kernel Image ... LZMA ERROR 1 - must RESET board to recover

===================================================================
                MT7621   stage1 code 13:15:05 (ASIC)
                CPU=50000000 HZ BUS=16666666 HZ
==================================================================
Change MPLL source from XTAL to CR...
do MEMPLL setting..
MEMPLL Config : 0x11100000
3PLL mode + External loopback
=== XTAL-40Mhz === DDR-1200Mhz ===
PLL3 FB_DL: 0x9, 1/0 = 599/425 25000000
PLL2 FB_DL: 0x10, 1/0 = 647/377 41000000
PLL4 FB_DL: 0x14, 1/0 = 782/242 51000000
do DDR setting..[00320381]
Apply DDR3 Setting...(use customer AC)
          0    8   16   24   32   40   48   56   64   72   80   88   96  104  112  120
      --------------------------------------------------------------------------------
0000:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0001:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0002:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0003:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0004:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0005:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0006:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0007:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0008:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0009:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
000A:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
000B:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
000C:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
000D:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
000E:|    0    0    0    0    0    0    0    0    0    0    1    1    1    1    1    1
000F:|    0    0    0    0    0    1    1    1    1    1    1    1    1    1    1    0
0010:|    1    1    1    1    1    1    1    1    1    1    0    0    0    0    0    0
0011:|    1    1    1    1    1    0    0    0    0    0    0    0    0    0    0    0
0012:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0013:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0014:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0015:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0016:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0017:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0018:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
0019:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
001A:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
001B:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
001C:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
001D:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
001E:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
001F:|    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
rank 0 coarse = 16
rank 0 fine = 40
B:|    0    0    0    0    0    0    0    0    0    0    1    1    1    0    0    0
opt_dle value:11
DRAMC_R0DELDLY[018]=00001E1E
==================================================================
                RX      DQS perbit delay software calibration
==================================================================
1.0-15 bit dq delay value
==================================================================
bit|     0  1  2  3  4  5  6  7  8  9
--------------------------------------
0 |    13 7 11 10 13 6 13 5 5 12
10 |    8 13 8 13 6 11
--------------------------------------

==================================================================
2.dqs window
x=pass dqs delay value (min~max)center
y=0-7bit DQ of every group
input delay:DQS0 =30 DQS1 = 30
==================================================================
bit     DQS0     bit      DQS1
0  (1~58)29  8  (1~55)28
1  (1~52)26  9  (1~54)27
2  (1~55)28  10  (1~54)27
3  (1~56)28  11  (1~55)28
4  (1~59)30  12  (1~59)30
5  (1~55)28  13  (1~55)28
6  (1~58)29  14  (1~56)28
7  (1~58)29  15  (1~57)29
==================================================================
3.dq delay value last
==================================================================
bit|    0  1  2  3  4  5  6  7  8   9
--------------------------------------
0 |    14 11 13 12 13 8 14 6 7 15
10 |    11 15 8 15 8 12
==================================================================
==================================================================
     TX  perbyte calibration
==================================================================
DQS loop = 15, cmp_err_1 = ffff0000
dqs_perbyte_dly.last_dqsdly_pass[0]=15,  finish count=1
dqs_perbyte_dly.last_dqsdly_pass[1]=15,  finish count=2
DQ loop=15, cmp_err_1 = ffff01aa
DQ loop=14, cmp_err_1 = ffff0080
dqs_perbyte_dly.last_dqdly_pass[1]=14,  finish count=1
DQ loop=13, cmp_err_1 = ffff0080
DQ loop=12, cmp_err_1 = ffff0000
dqs_perbyte_dly.last_dqdly_pass[0]=12,  finish count=2
byte:0, (DQS,DQ)=(9,8)
byte:1, (DQS,DQ)=(8,8)
20,data:89
[EMI] DRAMC calibration passed

===================================================================
                MT7621   stage1 code done
                CPU=50000000 HZ BUS=16666666 HZ
===================================================================


U-Boot 1.1.3 (May  2 2017 - 17:01:08)

Board: Ralink APSoC DRAM:  256 MB
relocate_code Pointer at: 8ffac000

Config XHCI 40M PLL
******************************
Software System Reset Occurred
******************************
Allocate 16 byte aligned buffer: 8ffe1130
Enable NFI Clock
# MTK NAND # : Use HW ECC
NAND ID [C8 D1 80 95 40]
Device not found, ID: c8d1
Not Support this Device!
chip_mode=00000001
Support this Device in MTK table! c8d1
select_chip
[NAND]select ecc bit:4, sparesize :64 spare_per_sector=16
Signature matched and data read!
load_fact_bbt success 1023
load fact bbt success
[mtk_nand] probe successfully!
mtd->writesize=2048 mtd->oobsize=64,    mtd->erasesize=131072  devinfo.iowidth=8
Env addr : 0x80000
..============================================
Ralink UBoot Version: 4.2.1.0
--------------------------------------------
ASIC MT7621AS (MAC to MT7530 Mode)
DRAM_CONF_FROM: Auto-Detection
DRAM_TYPE: DDR3
DRAM bus: 16 bit
Xtal Mode=3 OCP Ratio=1/3
Flash component: NAND Flash
Date:May  2 2017  Time:17:01:08
============================================
icache: sets:256, ways:4, linesz:32 ,total:32768
dcache: sets:256, ways:4, linesz:32 ,total:32768

 ##### The CPU freq = 880 MHZ ####
 estimate memory size =256 Mbytes

Reset switch ...
#Reset_MT7530

Please choose the operation:
   1: Load system code to SDRAM via TFTP.
   2: Load system code then write to Flash via TFTP.
   3: Boot system code via Flash (default).
   4: Entr boot command line interface.
   9: Load Boot Loader code then write to Flash via TFTP.
STANDALONE_LOAD_ADDR is 0xa1200000
..
******************************************
    Uboot StandAlone Entry
******************************************


******************************************
    Uboot StandAlone Entry
******************************************

eduperez · August 8, 2024, 5:45am

My two cents:

Those are not "kernels", the kernel is one (the most important one, probably) of the many packages that included in those releases.
Tell us the complete names of the files that you have installed.

dragoncraft · August 8, 2024, 7:33am

i downloaded from here: https://firmware-selector.openwrt.org/

Linux kernel with minimal file system. Useful for first installation or recovery.

Model SERCOMM NA502S
Platform ramips/mt7621
Version 23.05.4 (r24012-d8dd03c46f)
Filename: openwrt-23.05.4-ramips-mt7621-sercomm_na502s-initramfs-kernel.bin

Model SERCOMM NA502S
Platform ramips/mt7621
Version 23.05.3 (r23809-234f1a2efa)
Filename: openwrt-23.05.2-ramips-mt7621-sercomm_na502s-initramfs-kernel.bin

Model SERCOMM NA502S
Platform ramips/mt7621
Version 23.05.2 (r23630-842932a63d)
Filename: openwrt-23.05.3-ramips-mt7621-sercomm_na502s-initramfs-kernel.bin

Model SERCOMM NA502S
Platform ramips/mt7621
Version 22.03.7 (r20341-591b7e93d3)
Filename: openwrt-22.03.7-ramips-mt7621-sercomm_na502s-initramfs-kernel.bin

Model SERCOMM NA502S
Platform ramips/mt7621
Version SNAPSHOT (r27094-e5dc16e60d)
filename: openwrt-ramips-mt7621-sercomm_na502s-initramfs-kernel.bin

This i can Flash these Firmwases whitch are called Kernel in their description

then i can use the cammandline interface or the webGUI LuCi

theren i download from the same page as before the sysupgrade File with the same version number i used before:

eg when i made the "firsttime" flash with:
Model SERCOMM NA502S
Platform ramips/mt7621
Version 22.03.7 (r20341-591b7e93d3)
Filename: openwrt-22.03.7-ramips-mt7621-sercomm_na502s-initramfs-kernel.bin

Then i upload for the Sysupgrade the firmaware file: openwrt-22.03.7-ramips-mt7621-sercomm_na502s-squashfs-sysupgrade.bin

andyboeh · August 8, 2024, 6:49pm

The build for the similar NA502 was broken a few months ago, this might also be true for the NA502S. IIRC, it was some problem with kernel size and load address. I will check and report back.

Edit: Ah, easy to find: https://github.com/openwrt/openwrt/pull/14316

A similar patch is probably needed for the NA502S.

And the forum thread: Sercomm NA502 - MT7621 - LZMA ERROR 1

dragoncraft · August 8, 2024, 7:37pm

That’s why I tried the 22.03.7

And since then I am stuck in the boot loop

andyboeh · August 8, 2024, 10:36pm

I'm not sure if 22.03.7 ever worked. Can you compile a patched version with lzma-loader?

dragoncraft · August 9, 2024, 4:18pm

i tried to add it but i failed
i made a custom firmware
chose as far as i know the right settings:
Target: MediaTekRalink MIPS
Subtarget: MT7621
Device: SERCOMM NA502S
under Target Images
-> ramdisk -> Compression (lzma) -> lzma
-> squashfs 256 Block size (in KiB)

did i miss something?

andyboeh · August 9, 2024, 9:08pm

Did you edit the Makefile similar to the patch? You only need to select target and subtarget, the defaults are fine for the rest.

dragoncraft · August 11, 2024, 6:53pm

How would I do this?

andyboeh · August 11, 2024, 7:15pm

Once you've obtained the source code, edit the file target/linux/ramips/image/mt7621.mk. Find the section define Device/sercomm_na502s and add a line $(Device/uimage-lzma-loader) right after $(Device/nand).

The complete NA-502S section will then look like this:

define Device/sercomm_na502s
  $(Device/nand)
  $(Device/uimage-lzma-loader)
  IMAGE_SIZE := 20971520
  DEVICE_VENDOR := SERCOMM
  DEVICE_MODEL := NA502S
  DEVICE_PACKAGES := kmod-mt76x2 kmod-mt7603 kmod-usb3 kmod-usb-serial \
		kmod-usb-serial-xr_usb_serial_common -uboot-envtools
endef
TARGET_DEVICES += sercomm_na502s

Save and recompile. Please reset any changes you made when you ran make menuconfig, only change Target, Subtarget and Device to match the NA502S.

dragoncraft · August 18, 2024, 9:25pm

Sry for the late reply
I will try your suggestions tomorrow

dragoncraft · August 20, 2024, 11:27pm

I deleted the folders I used for compiling the firmware, then newly downloaded everything from Git. I created a new .config file and switched to the directory:

cd /home/dragoncraft/openwrt_23.05/target/linux/ramips/image/
nano mt7621.mk

I added the LZMA loader:

define Device/sercomm_na502s
  $(Device/nand)
  $(Device/uimage-lzma-loader)
  IMAGE_SIZE := 20971520
  DEVICE_VENDOR := SERCOMM
  DEVICE_MODEL := NA502S
  DEVICE_PACKAGES := kmod-mt76x2 kmod-mt7603 kmod-usb3 kmod-usb-serial \
                     kmod-usb-serial-xr_usb_serial_common -uboot-envtools
endef

Next, I compiled the firmware.

Then, I uploaded openwrt-ramips-mt7621-sercomm_na502s-initramfs-kernel.bin to the NA502S.

After configuring the device, I uploaded openwrt-ramips-mt7621-sercomm_na502s-squashfs-sysupgrade.bin.

and i still get the same error

   Uboot StandAlone Entry
******************************************
                                                                                                                                                            0

******************************************
    Uboot StandAlone Entry
******************************************
Flash Sector Number : 522.

***************************************************
    Sercomm Boot Version 2.00.6

***************************************************
Entering Firmware : Everything is OK.

=================================================
Check image validation:
Image1 Header Magic Number --> OK
Image2 Header Magic Number --> OK
Image1 Header Checksum --> OK
Image2 Header Checksum --> OK
Image1 Data Checksum --> ........................................................................................OK
Image2 Data Checksum --> ............................................OK

Image1: OK Image2: OK

=================================================
..kernel addr :0xbfd40000

flash base: 0xbfc00000, kernel addr :0xbfd40000, bootloader size: 0x80000, config size 0x80000, fac size : 0x40000
..Erasing NAND Flash...
.Writing to NAND Flash...
done

3: System Boot system code via Flash.
## Booting image at bfd40000 ...
   Image Name:   MIPS OpenWrt Linux-5.15.162
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    5754115 Bytes =  5.5 MB
   Load Address: 80001000
   Entry Point:  80001000
........................................................................................   Verifying Checksum ... OK
   Uncompressing Kernel Image ... LZMA ERROR 1 - must RESET board to recover

dragoncraft · August 30, 2024, 8:05pm

anybody any ideas?

could it be that i am missing something or ist there a problem ?

andyboeh · August 31, 2024, 9:05pm

I have a spare device in the basement, I just don't know when I find the time to dig it out. To me, it looks like your flash did not succeed, the image size is exactly the same as the previous build - this is very suspicious.

dragoncraft · September 15, 2024, 6:15pm

did you have time to find your test device?

andyboeh · September 15, 2024, 7:09pm

Yeah, I found it last week

In the meantime, the build succeeded, booted via TFTP, flashed to NAND and everything is working fine with the lzma-loader:

3: System Boot system code via Flash.
## Booting image at c1140000 ...
   Image Name:   MIPS OpenWrt Linux-6.6.48
   Image Type:   MIPS Linux Kernel Image (uncompressed)
   Data Size:    3215338 Bytes =  3.1 MB
   Load Address: 80001000
   Entry Point:  80001000
..................................................   Verifying Checksum ... OK
OK
No initrd
## Transferring control to Linux (at address 80001000) ...
## Giving linux memsize in MB, 256

Starting kernel ...



OpenWrt kernel loader for MIPS based SoC
Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
Decompressing kernel... done!
Starting kernel at 80001000...

[    0.000000] Linux version 6.6.48 (andy@x13y) (mipsel-openwrt-linux-musl-gcc (OpenWrt GCC 13.3.0 r27291-9bc782dfd8) 13.3.0, GNU ld (GNU Binutils) 2.42) #0 SMP Mon Sep  2 18:26:42 2024
[    0.000000] SoC Type: MediaTek MT7621 ver:1 eco:3
[    0.000000] printk: bootconsole [early0] enabled
[    0.000000] CPU0 revision is: 0001992f (MIPS 1004Kc)
[...]

I'll prepare a PR.

PR submitted and accepted for snapshot: https://github.com/openwrt/openwrt/pull/16399
PR for 23.05 submitted and accepted at https://github.com/openwrt/openwrt/pull/16412

Snapshot builds should boot properly in 1-2 days. OpenWrt 23.05.5 should work properly now!