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telnet.md

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Enable Telnet of S1E

Hard way (High Risk, do it at your own risk)

  1. Open the case
  2. Connect to UART, reference to the picture. Suggestion use soldering.

uart

  1. Interrupt uboot.
  • Use putty to open COM port. Baud Rate is 115200.
  • While boot up, keep pressed the key "enter". If not stop uboot, please try again.
  • The S1E which was shipped out afere Jul 2023, the "enter" interrupt is not working.
  • To interrupt uboot, you need use short CLK pin (pin 6) and GND pin or CS Pin (pin 1) and Vcc pin while uboot reading kernel. Notice: This method is dangerous and it may make S1E become bricked if you are not familiar with the circuit.
  1. If it stopped on uboot cli, enter the following command
nand info

Check if nand is properly initialized.

Device 0: nand0, sector size 128 KiB
  Page size      2048 b
  OOB size         64 b
  Erase size   131072 b

If NAND is initialized, run the next command to continue.

printenv bootargs

Save the bootargs to note, then replace the string "/linuxrc" to "/bin/sh". For example, the new bootargs as below

setenv bootargs root=/dev/mtdblock7 rootfstype=squashfs ro init=/bin/sh loglevel=8 LX_MEM=0x3FE0000 mma_heap=mma_heap_name0,miu=0,sz=0x2B0000 cma=2M highres=on mmap_reserved=fb,miu=0,sz=0x300000,max_start_off=0x3300000,max_end_off=0x3600000 mtdparts=nand0:1664k@0x140000(BOOT0),1664k(BOOT1),256k(ENV),256k(ENV1),128k(KEY_CUST),3m(KERNEL),3m(KERNEL_BAK),20m(rootfs),20m(rootfs_bak),1m(factory),1m(MISC),10m(RES),10m(RES_BAK),-(UBI)

Then enter the following commands

run bootcmd
  1. It will continue to boot kernel and stops shell console. Then enter the following command.
/bin/fwfs --block_size=131072 --subblock_size=32768 --block_cycles=500 --read_size=2048 --prog_size=2048 --cache_size=32768 --file_cache_size=32768 --cache_pool_size=2 --block_count=8 --lookahead_size=8 /dev/mtd10 /misc
  1. Then delete the 'passwd' file.
rm /misc/passwd
  1. After deleted, restart the S1E. Wait for the booting completely, use the following command to clear password. Then continue to next step to flash firmware that enabled telnet.
passwd -d root
  1. After the version of firmware 2.0.6_0000, the telnetd was removed. So you have to flash the modified firmware that enabled "telnetd" and "post_init.sh" to make telnet working.

Note that flashing firmware is USING AT YOUR OWN RISK.

Flash S1E Custom firmware method

cd /tmp && wget -O /tmp/curl "http:https://master.dl.sourceforge.net/project/aqarahub/binutils/curl?viasf=1" && chmod a+x /tmp/curl
/tmp/curl -s -k -L -o /tmp/s1e_update.sh https://raw.githubusercontent.com/niceboygithub/AqaraSmartSwitchS1E/master/firmwares/modified/S1E/s1e_update.sh
chmod a+x /tmp/s1e_update.sh && /tmp/s1e_update.sh