Mt300n-v2 gpio

peter_ber · 2017-10-08T22:35:32.000Z

For some of your Routers the specs show the pinout of the PCB, unfortunately not so for the MT300N-V2. The User Guide doesn’t either.

I would like to employ the device in a stationary Server role, connecting a USB cam and a temperature/humidity sensor (BME280 via I2C). Before I try anything I want to assemble as much information as I can for driving the sensor in this environment. Would I need, for example, a special driver for the device, or is some generic driver sufficient?

Any help will be greatly appreciated.

alzhao · 2017-10-10T18:22:55.000Z

Please check

peter_ber · 2017-10-10T23:58:52.000Z

@alzhao: Thank you, that really helps.

The rest of my questions I should probably ask in the Software Forum…

freedomlives · 2018-01-25T00:03:14.000Z

What is J8 on the board for?

billingd · 2018-05-08T09:50:03.143Z

I’m new here. i have a MT300N-V2 in the mail. I am reading up and getting ready to do some simple hardware hacking.

The web site says “4 GPIOs for more DIY fun”. I have found the PCB pinout of the header showing:

GPIO13 = RX0
GPIO12 = TX0
GPIO4 = I2C_SCLK
GPIO5 = I2C_SD
GPIO45 = TX1
GPIO46 = RX1

Which of the pins are available. I want to hook up a GPS module TX and RX to a 3.3V UART and the GPS PPS signal to an interrupt-driven GPIO input.

I intend building a Stratum 1 NTP reference clock. I have just made one using a Raspberry Pi Zero W. It is better than internet NTP servers, but the jitter on the wireless interface is larger than I like

billingd · 2018-05-22T11:55:22.959Z

OK. The MT300N-V2 arrived today. Soldered in a header and had a poke around. By default with the 2.27 firmware, GPIO4 GPIO5 GPIO45 and GPIO46 on the inner row of the header are all available. As described in https://openwrt.org/docs/techref/hardware/port.gpio I was able to enable and toggle them using

# echo "4" > /sys/class/gpio/export
# echo "out" > /sys/class/gpio/gpio4/direction
# echo "0" > /sys/class/gpio/gpio4/value
# echo "1" > /sys/class/gpio/gpio4/value

… and similarly for the other pins. Output confirmed with a LED and a voltmeter.

alzhao · 2018-05-23T03:24:15.463Z

OK. Hope you have a good DIY journey.

billingd · 2018-05-23T03:46:54.054Z

alzhao:

Hope you have a good DIY journey.

Thanks. I will have fun as this is all about the journey. I learn by doing.