$ binwalk mjsxj10cm_original.bin DECIMAL HEXADECIMAL DESCRIPTION 0 0x0 uImage header (ARM Linux) 0x40 0x40 LZMA compressed data 0x400000 0x400000 Squashfs filesystem (little endian)
127.0.0.1 p2p.tuvalabs.com 127.0.0.1 log.tuvalabs.com For full control, replace with OpenIPC (supports iCatch V39):
Extract Squashfs:
binwalk -e firmware_update.bin cat /dev/mtdblock0 > /tmp/mtd0.bin 4. Firmware Structure Analysis Using binwalk on a typical dump:
# Check running processes ps aux strings /usr/bin/ipcam | grep -i "rtsp|cloud|tuva" Dump network connections netstat -tunap Mount debugfs mount -t debugfs none /sys/kernel/debug
# Check if rtsp_server exists ls /usr/bin/rtsp_server #!/bin/sh /usr/bin/rtsp_server -p 554 -u admin -P [your_password] &
[GND] [TX] [RX] [3.3V] (TX from camera → RX of USB-UART) Method 1: Direct Flash Dump Use a CH341A programmer or similar:
# Download OpenIPC for V39 wget https://github.com/OpenIPC/firmware/releases/download/latest/openipc.v39-*-nor-flash.bin flashrom -p ch341a_spi -w openipc.v39.bin Then configure RTSP, MQTT, etc. via web interface. | Problem | Solution | |---------|----------| | Bricked camera (no boot) | Re-flash via SPI programmer + original backup | | RTSP not working | Check if rtsp_server binary exists; try strace to see missing libs | | WiFi not connecting | Use iwconfig manually; check antenna connection | | UART no output | Swap TX/RX; check baud rate (115200 or 57600) | 10. Conclusion The Mjsxj10cm firmware is modifiable despite lacking official support. By dumping, extracting, and repacking the SquashFS root, one can remove cloud dependencies, enable RTSP/telnet, and secure the device. For long-term use, OpenIPC provides a cleaner, maintainable alternative.