| Port | Purpose | Baud rate (typical) | |------|---------|----------------------| | | Modem diagnostics, AT commands, NV tools | 115200 / 921600 | | Debug Port | Kernel log (dmesg), ARM trace, crash logs | 115200 / 921600 |
cat /dev/ttySPRD2 | grep -E '^\$G[NPR]' > gps_nmea.txt spreadtrum sci usb2serial ok
Watch system logs
: Professional tools such as SPD Upgrade Tool (ResearchDownload), Infinity-Box CM2SPD, or Miracle Box can now "see" the phone to begin operations. | Port | Purpose | Baud rate (typical)