MKR NB 1500 Serial1 stops working when Sara R410 modem is activated

Hardware MKR Family MKRGSM1400
4

That's unfortunate. I've been meaning to figure out what a good option is for getting my MKR NB 1500 and my MKR GSM 1400 on the network but haven't gotten around to it yet.

Would this work as a minimal demonstration sketch?:

#include <MKRNB.h>
const char PINNUMBER[] = "";
NB nbAccess;

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  Serial1.begin(9600);
  nbAccess.begin(PINNUMBER)
}

void loop() {
  Serial1.println("hello");
  digitalWrite(LED_BUILTIN, HIGH);
  delay(500);
  digitalWrite(LED_BUILTIN, LOW);
  delay(500);
}

If so, a blinking LED will tell you that nbAccess.begin() did return.