Firmware Gm220-s May 2026

To develop a feature for the (a GPON ONT/ONU, often used by ISPs like China Mobile), you need to work within its OpenWrt‑based firmware environment. Below is a structured approach, from understanding the device to implementing a new feature. 1. Understand the Platform | Component | Details (typical for Gm220‑s) | |----------------|----------------------------------------------------------| | SoC | Realtek RTL960x series (e.g., RTL9601D) | | OS | OpenWrt (customized by vendor, usually Linux 3.18/4.4) | | Flash | SPI NAND (~128 MB) | | RAM | DDR2/DDR3 (~128 MB) | | Shell access | Telnet/SSH (may need to enable via web hidden page) | | SDK | Realtek OpenWrt SDK + vendor patches |

$(eval $(call BuildPackage,traffic-led)) Read /proc/net/dev , compute rate, trigger LED via sysfs. Firmware Gm220-s

define Package/traffic-led SECTION:=utils CATEGORY:=Utilities TITLE:=Flash LED on high network traffic DEPENDS:=+libubox +libubus endef To develop a feature for the (a GPON