ZY-M100-L/S_1/S_2/24G/24GV2 solving network spamming problem by disabling Target Distance reporting

Mods:

• Target distance (DP: 9/109) reporting disabled.
• Settings report interval (DPs: 1, 4, 2, 3, 6, 101, 102, 103, 104) increased to 60s, stock FW 10s.
• Illuminance Lux report interval (DP 104) increased to 10s, stock FW 500ms

Suppoted models:

• ZY-M100_L (_TZE204_ztc6ggyl)
• ZY-M100-S_1 (_TZE204_sxm7l9xa) (_TZE204_e5m9c5hl)
• ZY-M100-S_2 (_TZE204_qasjif9e)
• ZY-M100-24G (_TZE204_ijxvkhd0)
• ZY-M100-24GV2 (_TZE204_7gclukjs)

Models with secured chip (not supported):

• WZ-M100 _TZE204_laokfqwu

Connect to JLink

Signal	ZY-M100-L	J-Link	GD32
VCC	(square pad) 1	(Vref) 1
GND	2	4
SWDIO	3	7	19
SWCLK	4	9	20

Backup original firmware

JLink.exe -device GD32E230F8 -if SWD -speed 4000 -autoconnect 1 

savebin ZY-M100_bkup.bin 0x08000000 0x10000
exit

Flash modified firmware

JLink.exe -device GD32E230F8 -if SWD -speed 4000 -autoconnect 1 

loadfile ZY-M100-{your_model_here}-TargetDistance_disable.bin 0x08000000 reset
VerifyBin ZY-M100-{your_model_here}-TargetDistance_disable.bin  0x08000000
exit

Restore backuped firmware

JLink.exe -device GD32E230F8 -if SWD -speed 4000 -autoconnect 1 

loadfile ZY-M100_bkup.bin 0x08000000 reset
VerifyBin ZY-M100_bkup.bin  0x08000000
exit

Connect to ST-Link V2 clone

Signal	ZY-M100-L	ST-Link V2	GD32
VCC	(square pad) 1	2
GND	2	7
SWDIO	3	6	19
SWCLK	4	4	20

Be careful check adapter pinout! Some clones have different one.

Backup original firmware using OpenOCD

openocd -f interface/stlink.cfg -f target/gd32e23x.cfg -c init -c "reset halt" -c "flash read_bank 0 ZY-M100_bkup.bin" -c "reset" -c shutdown

Flash modified firmware

openocd -f interface/stlink.cfg -f target/gd32e23x.cfg -c init -c "reset halt" -c "flash erase_sector 0 0 last" -c "flash write_bank 0 ZY-M100-{your_model_here}-TargetDistance_disable.bin" -c "flash verify_bank 0 ZY-M100-{your_model_here}-TargetDistance_disable.bin" -c "reset" -c shutdown

Restore backuped firmware

openocd -f interface/stlink.cfg -f target/gd32e23x.cfg -c init -c "reset halt" -c "flash erase_sector 0 0 last" -c "flash write_bank 0 ZY-M100_bkup.bin" -c "flash verify_bank 0 ZY-M100_bkup.bin" -c "reset" -c shutdown

Step by step guide by @tandarra

Software

• ST-LINK, ST-LINK/V2, ST-LINK/V2-1, STLINK-V3 USB driver signed for Windows7, Windows8, Windows10
• OpenOCD

tech info

• Microwave motion sensor module JYSJ_5807_A01
• TuyaMCU GD32E230F8P6TR
• Zigbee module ZS3L
• Адаптеры JTAG с поддержкой SWD
• SWJ adapters