if (sensorReading.endsWith(0)) {
Perhaps you meant:
if (sensorReading.endsWith("0")) {
or maybe
if (sensorReading.endsWith('0')) {
if (sensorReading.endsWith(0)) {
Perhaps you meant:
if (sensorReading.endsWith("0")) {
or maybe
if (sensorReading.endsWith('0')) {