diff --git a/distancesensor.ts b/distancesensor.ts
index 8d34217..7ca15f5 100644
--- a/distancesensor.ts
+++ b/distancesensor.ts
@@ -734,43 +734,6 @@ namespace distanceSensor {
         return true
     }
 
-    // Start continuous ranging measurements. If period_ms (optional) is 0 or not
-    // given, continuous back-to-back mode is used (the sensor takes measurements as
-    // often as possible) otherwise, continuous timed mode is used, with the given
-    // inter-measurement period in milliseconds determining how often the sensor
-    // takes a measurement.
-    // based on VL53L0X_StartMeasurement()
-    function DS_start_continuous(period_ms: number) { // period_ms = 0
-        I2C_WriteReg8(DS_ADDRESS, 0x80, 0x01)
-        I2C_WriteReg8(DS_ADDRESS, 0xFF, 0x01)
-        I2C_WriteReg8(DS_ADDRESS, 0x00, 0x00)
-        I2C_WriteReg8(DS_ADDRESS, 0x91, DS_stop_variable)
-        I2C_WriteReg8(DS_ADDRESS, 0x00, 0x01)
-        I2C_WriteReg8(DS_ADDRESS, 0xFF, 0x00)
-        I2C_WriteReg8(DS_ADDRESS, 0x80, 0x00)
-
-        if (period_ms != 0) {
-            // continuous timed mode
-
-            // VL53L0X_SetInterMeasurementPeriodMilliSeconds() begin
-
-            let osc_calibrate_val = I2C_ReadReg16(DS_ADDRESS, DS_Constants.OSC_CALIBRATE_VAL)
-
-            if (osc_calibrate_val != 0) {
-                period_ms *= osc_calibrate_val
-            }
-
-            I2C_WriteReg32(DS_ADDRESS, DS_Constants.SYSTEM_INTERMEASUREMENT_PERIOD, period_ms)
-
-            // VL53L0X_SetInterMeasurementPeriodMilliSeconds() end
-
-            I2C_WriteReg8(DS_ADDRESS, DS_Constants.SYSRANGE_START, 0x04) // VL53L0X_REG_SYSRANGE_MODE_TIMED
-        } else {
-            // continuous back-to-back mode
-            I2C_WriteReg8(DS_ADDRESS, DS_Constants.SYSRANGE_START, 0x02) // VL53L0X_REG_SYSRANGE_MODE_BACKTOBACK
-        }
-    }
-
     // Did a timeout occur in one of the read functions since the last call to
     // timeout_occurred()?
     function timeoutOccurred(): boolean {
@@ -792,6 +755,9 @@ namespace distanceSensor {
     export function vcselPeriodPreRange() {
         return DS_VcselPeriodPreRange
     }
+    export function vcselPeriodFinalRange() {
+        return DS_VcselPeriodFinalRange
+    }
 
     export function init() {
         // try resetting from ADDRESS_TARGET
@@ -819,6 +785,44 @@ namespace distanceSensor {
         DS_set_timeout(500) // 0.5 seconds
     }
 
+        // Start continuous ranging measurements. If period_ms (optional) is 0 or not
+    // given, continuous back-to-back mode is used (the sensor takes measurements as
+    // often as possible) otherwise, continuous timed mode is used, with the given
+    // inter-measurement period in milliseconds determining how often the sensor
+    // takes a measurement.
+    // based on VL53L0X_StartMeasurement()
+    export function startContinuous(period_ms: number) { // period_ms = 0
+        I2C_WriteReg8(DS_ADDRESS, 0x80, 0x01)
+        I2C_WriteReg8(DS_ADDRESS, 0xFF, 0x01)
+        I2C_WriteReg8(DS_ADDRESS, 0x00, 0x00)
+        I2C_WriteReg8(DS_ADDRESS, 0x91, DS_stop_variable)
+        I2C_WriteReg8(DS_ADDRESS, 0x00, 0x01)
+        I2C_WriteReg8(DS_ADDRESS, 0xFF, 0x00)
+        I2C_WriteReg8(DS_ADDRESS, 0x80, 0x00)
+
+        if (period_ms != 0) {
+            // continuous timed mode
+
+            // VL53L0X_SetInterMeasurementPeriodMilliSeconds() begin
+
+            let osc_calibrate_val = I2C_ReadReg16(DS_ADDRESS, DS_Constants.OSC_CALIBRATE_VAL)
+
+            if (osc_calibrate_val != 0) {
+                period_ms *= osc_calibrate_val
+            }
+
+            I2C_WriteReg32(DS_ADDRESS, DS_Constants.SYSTEM_INTERMEASUREMENT_PERIOD, period_ms)
+
+            // VL53L0X_SetInterMeasurementPeriodMilliSeconds() end
+
+            I2C_WriteReg8(DS_ADDRESS, DS_Constants.SYSRANGE_START, 0x04) // VL53L0X_REG_SYSRANGE_MODE_TIMED
+        } else {
+            // continuous back-to-back mode
+            I2C_WriteReg8(DS_ADDRESS, DS_Constants.SYSRANGE_START, 0x02) // VL53L0X_REG_SYSRANGE_MODE_BACKTOBACK
+        }
+    }
+
+
 
     // Set the return signal rate limit check value in units of MCPS (mega counts
     // per second). "This represents the amplitude of the signal reflected from the