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diff --git a/Mode/ModeData.cpp b/Mode/ModeData.cpp
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+/* Copyright (c) <2016> <MultiTech Systems>, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "ModeData.h"
+#include "MTSText.h"
+
+ModeData::ModeData(DOGS102* lcd, ButtonHandler* _buttons, mDot* _dot, LoRaHandler* lora, GPSPARSER* gps, SensorHandler* sensors)
+    :Mode(lcd,_buttons,_dot,lora,gps,sensors),
+     _data(lcd),
+     _help(lcd),
+     _buf_size(ONELINEMAX)
+{}
+
+ModeData::~ModeData() {}
+
+bool ModeData::checkFile()
+{
+    bool exists = false;
+    //get all files and see if file exists
+    vector<mDot::mdot_file> files = _dot->listUserFiles();
+    for (vector<mDot::mdot_file>::iterator it = files.begin(); it != files.end(); it++) {
+        if (strcmp(file_name,it->name)==0) {
+            exists = true;
+            break;
+        }
+    }
+    //if file doesnt exist exit to main menu
+    if(!exists) {
+        _data.noData();
+        osDelay(4000);
+        return true;
+    }
+    _file = _dot->openUserFile(file_name, mDot::FM_RDONLY);
+    //if nothing is in file exit to main menu
+    if (_file.fd < 0) {
+        _data.errorData();
+        osDelay(4000);
+        _dot->closeUserFile(_file);
+        return true;
+    }
+    return false;
+}
+
+bool ModeData::start()
+{
+    if(checkFile())
+        return true;
+    _help.display();
+    osDelay(3000);
+    readFile();
+}
+
+void ModeData::displayData()
+{
+    std::vector<std::string> data = mts::Text::split(_str, ',');
+    _line.id = data.at(0);
+    _line.status = data.at(1);
+    _line.lock = data.at(2);
+    _line.lat = data.at(3);
+    _line.lng = data.at(4);
+    _line.alt = data.at(5);
+    _line.time = data.at(6);
+    _line.gateways = data.at(7);
+    _line.margin = data.at(8);
+    _line.rssiD = data.at(9);
+    _line.snrD = data.at(10);
+    _line.dataRate = data.at(11);
+    _line.power = data.at(12);
+    _data.updateAll(_line);
+}
+
+//get the current line out of the buffer into str
+void ModeData::getLine()
+{
+    _prev = 0;
+    _indexUpdate = 0;
+    _str = "";
+    _dot->readUserFile(_file, (void*)_buf, _buf_size);
+    //only gets called when going back
+    if(_last) {
+        //-3 puts it back to one before new line
+        _indexUpdate = _buf_size - 3;
+        //check from back of buffer for new line
+        while(_buf[_indexUpdate]!='\n'&&_indexUpdate>=0) _indexUpdate--;
+        _indexUpdate++;
+    }
+    //go from indexUpdate to new line to ge the line
+    //prev keeps track of how long line read was
+    while(_buf[_indexUpdate]!='\n') {
+        _str += _buf[_indexUpdate];
+        _indexUpdate++;
+        _prev++;
+    }
+    //push index past newline
+    _index += _indexUpdate+1;
+    displayData();
+}
+
+void ModeData::back()
+{
+    if(_index>=(_buf_size+_prev)) {
+        _index -= (_prev+_buf_size);
+    } else {
+        //special case for beginning of file
+        if(_index>0) _buf_size = _index-1;
+        _buf_size -= _prev;
+        _index = 0;
+    }
+    _last = true;
+    _dot->seekUserFile(_file,_index, SEEK_SET);
+    getLine();
+}
+
+void ModeData::forward()
+{
+    _last = false;
+    if(_index<_file.size) {
+        _buf_size = ONELINEMAX;
+        _dot->seekUserFile(_file, _index, SEEK_SET);
+        getLine();
+    }
+}
+
+//update switch labels
+void ModeData::configSw()
+{
+    if(_index-(_prev+1)<=0) _data.updateSw2("");
+    else _data.updateSw2("Back");
+    if(_index<_file.size) _data.updateSw1("Next");
+    else _data.updateSw1("");
+}
+
+
+bool ModeData::readFile()
+{
+    _index = 0;
+    _last = false;
+    _prev = 0;
+    _indexUpdate = 0;
+    //called to start on page one
+    forward();
+    configSw();
+    ButtonHandler::ButtonEvent be;
+
+    while (true) {
+
+        be = _buttons->getButtonEvent();
+
+        switch(be) {
+            case ButtonHandler::sw1_press:
+                if(_index!=_file.size) {
+                    forward();
+                    configSw();}
+                break;
+
+            case ButtonHandler::sw2_press:
+                if(_index-(_prev+1)>0) {
+                    back();
+                    configSw();}
+                break;
+
+            case ButtonHandler::sw1_hold:
+                _dot->closeUserFile(_file);
+                return true;
+
+            default:
+                break;
+        }
+    }
+}
+
+