Z2M says it is ZY-M100-S_2 so I would like to disassemble and flash the non spam firmware.
I’ve already disassemble one similar to this.
Just pull on this round part.
Which round part? Have you flashed the non spam firmware?
Yes, I used the non-spam firmware. But I did it for a friend, my model is wall mounted and his is the same as the one in the photo below.
Where I circled in yellow is where you have to open. If yours is the same as the one in the photo, do not use the red pins, the pins for flash are on another board in the device.