I have a Nova with SARA-R410M-02B it is connected to a raspberry pi 3 b+ via USB 2.0 port. The SARA-R4 can use USB 2.0 to interface to the pi and send AT commands, data communication, FOAT, FW updates, and diagnostics. My interest is data communication. If I have serial data coming into the pi’s 40 pin header GPIO pins 16, 21, and 20 then how can I send that data to the USB 2.0 port that the Nova is connected to? How can I get Nova to push that data to the LTE network automatically without needing to use an AT command every time a new data point comes in? Then, how can I get Nova to receive data points and push them to the pi’s gpio pins? The communication is bidirectional. I posted a similar question like this before in this forum, the reply I got was a generic response “setup PPP”, I am not a programmer so detailed explanations help me, and surely others who have this problem.