GL-MT300N-V2 how to use/enable I2C or I2C/RX1/TX1 pins as gpio

Technical Support for Routers
2

If you want to use I2C and UART pin, you have to build the firmware by yourself. If you use the official OpenWRT buildroot. Please modify the dts file target/linux/ramips/dts/GL-MT300N-V2.dts.

Append those lines to dts file.

&i2c {
	status = "okay";
};

Configure uart1 to GPIO.

&pinctrl {
	state_default: pinctrl0 {
		gpio {
			ralink,group = "wdt", "gpio", "wled_an", "p0led_an", "p1led_an", "i2s", "uart1";
			ralink,function = "gpio";
		};
	};
};

Please rebuild the firmware after modifying.

The modified dts file is in the attachment.

GL-MT300N-V2.zip (1.0 KB)

1 Like