diff --git a/README.md b/README.md
index 5b2d95d7..23b0e7dc 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
+# This repository is updated for TTN v3 download this library and also remove the old lmic library from arduino libraries  and download the latest library from[here](https://github.com/mcci-catena/arduino-lmic)
 # FloodSense Sensor Technical Documentation
 [This repository](https://github.com/floodsense/floodsense_sensor) contains the source code for the Floodsense sensor which uses ultrasonic sensor technology to detect floods and send the data over LoRa using LoRaWAN protocol. [Here](https://github.com/floodsense/sensor_experiments) is the experiments repo containing technical documentation, analysis and additional support related to this library.
 
diff --git a/src/lorawan.cpp b/src/lorawan.cpp
index a7d906ce..c7d2db6e 100644
--- a/src/lorawan.cpp
+++ b/src/lorawan.cpp
@@ -13,7 +13,8 @@ unsigned int TX_INTERVAL;
 
 unsigned char cfg_packet[7];
 unsigned char lora_packet[5];
-bool TX_COMPLETED = false;        // Set to false on start and after sleep; is set to true when an uplink is successful
+bool TX_COMPLETED = false;
+      // Set to false on start and after sleep; is set to true when an uplink is successful
 bool UPDATE_CONFIG = true;        // Set to true at start and when there is a change in sensor cfg; used to send sensor cfg via uplink
 
 void os_getArtEui (u1_t* buf) {
@@ -442,15 +443,12 @@ void prepare_packet(void) {
     /* LoraWAN uplink packet format
             | Error flags  | Battery Level | Ultrasonic reading  |
             |   1 byte     |    2 bytes    |        2 bytes      |
-
             |     Ultrasonic reading      |
             |           2 bytes           |
             |    high byte | low byte     |
-
             |       Battery Level       |
             |           2 bytes         |
             |    high byte | low byte   |
-
             |------------------------------------------------------------ Error Flags  ----------------------------------------------------------------|
             |     bit 7                                                |  bit 6   |  bit 5  |  bit 4  |  bit 3  |  bit 2  |  bit 1  |      bit 0       |
             |     Used only for CFG update (all other bits are high)   |          |         |         |         |         |         |   SD error flag  |
@@ -495,13 +493,20 @@ void prepare_packet(void) {
 
 void lorawan_runloop_once() {
   os_runloop_once();
-  if ( !os_queryTimeCriticalJobs(ms2osticksRound((TX_INTERVAL * 1000) - 1000 )) && TX_COMPLETED == true) {
+  //&& TX_COMPLETED == true
+  //!(LMIC.opmode & OP_TXRXPEND)
+  if ( !os_queryTimeCriticalJobs(ms2osticksRound(8000) ) && TX_COMPLETED == true   ) {
     TX_COMPLETED = false;
     // This means the previous TX is complete and also no Critical Jobs pending in LMIC
     Serial.println("About to go to deep sleep and no critical jobs");
+    //delay(30000);
     gotodeepsleepnow(TX_INTERVAL);
     Serial.println("Im awake and TX_COMPLETED is set to false");
-    // Prepare a packet in relaxed setiing
+    while(LMIC.opmode & OP_TXRXPEND){
+      os_runloop_once();
+    }
+    
+     //Prepare a packet in relaxed setiing
     prepare_packet();
     os_setCallback(&sendjob, do_send);
   }
diff --git a/src/maxbotix.cpp b/src/maxbotix.cpp
index d05b85fc..632acb57 100644
--- a/src/maxbotix.cpp
+++ b/src/maxbotix.cpp
@@ -19,19 +19,15 @@ void setup_maxbotix(unsigned int mode=2, unsigned int sampling_rate=250 , unsign
   digitalWrite(triggerPin, LOW);
   Serial1.begin(9600);
   Serial.println("Sensor Settings:");
-  writeToSDCard(String("Sensor Settings:"));
   sensorMode = mode;
   Serial.print("    Sensor mode: ");
   Serial.println(sensorMode);
-  writeToSDCard(String("    Sensor mode: "+ sensorMode));
   sensor_sampling_rate = sampling_rate;
   Serial.print("    Sensor sampling rate: ");
   Serial.println(sensor_sampling_rate);
-  writeToSDCard(String("    Sensor sampling rate: "+ sensor_sampling_rate));
   sensor_numberOfReadings = numberOfReadings;
   Serial.print("    Number of readings per measurement: ");
   Serial.println(sensor_numberOfReadings);
-  writeToSDCard(String("    Number of readings per measurement: "+ sensor_numberOfReadings));
 }
 
 uint16_t sensor_singleread(void) {
@@ -91,25 +87,19 @@ uint16_t read_sensor_using_modes(unsigned int sensorMode, unsigned int sensor_sa
     case 1:
       // Mean
       distance = mean(readings_arr, n, sensor_numberOfReadings);
-      Serial.print("Mean is: "); Serial.println(distance);
-      writeToSDCard(String("Mean is: " + distance));
       break;
     case 2:
       // Median
       distance = median(readings_arr, n, sensor_numberOfReadings);
-      Serial.print("Median is: "); Serial.println(distance);
-      writeToSDCard(String("Median is: " + distance));
       break;
     case 3:
       // Mode
       distance = mode(readings_arr, n, sensor_numberOfReadings);
-      Serial.print("Mode is: "); Serial.println(distance);
-      writeToSDCard(String("Mode is: " + distance));
+      break;
     default:
       // Single Pulse-In single reading
       distance = sensor_singleread();
-      Serial.print("Default single reading is: "); Serial.println(distance);
-      writeToSDCard(String("Default single reading is: " + distance));
+      break;
   }
   Serial.println("Cleaning measurements array...");
   writeToSDCard(String("Cleaning measurements array..."));