Had the same initial problem - no data output from Uno R4 Wifi with 9 Axis shield - all values constant. For me, adding the line:
Wire.setClock(I2C_MASTER_RATE_FAST);
after Wire.begin();
solved the issue as described in:
Had the same initial problem - no data output from Uno R4 Wifi with 9 Axis shield - all values constant. For me, adding the line:
Wire.setClock(I2C_MASTER_RATE_FAST);
after Wire.begin();
solved the issue as described in: