Link RING0 from EHS5-E modem to GPIO4 pin of an RPi3 | Telit Cinterion IoT Developer Community
May 17, 2016 - 10:00pm, 2505 views
I am trying to use RING0 in order to get notifications when an SMS arrives. The modem is connnected through USB with an RPi# and I am trying to use a wire between RING0 pin and a GPIO pin of the RPi in order to get notifications from modem (RING0 is put on low). I would like to know if it is enough to use a simple wire between these pins or a pull up resistor should be used.