=====Dragonfruit Team Meeting - March 20th, 2017=====
Attended: Kevin, Gordon, Tyler

==== Updates ====  
  * Debugging boards : charging chip of board 4 and 5 were compared with adafruit
    * Behavior was exactly the same
    * Battery voltage ≈ 3.245 V
    * Max voltage output (at max irradiance) = 4.6V
    * **Voltage load initially at 6.5V before lowering to 4.6V when max irradiance is applied at once**
    * **Voltage load dips to 2.7V for a split second before settling back at 3.245V (battery Voltage)**
    * why is max voltage 4.6V?
  * Worked on eagle redesign of board

==== Problems ==== 
  * Messed up on charging chip soldering
    * NEVER solder the pad on the board itself, only the pad on the part
  * Gateway was down so we weren't able to test the board
  * Conditions indoors cannot replicate outdoor irradiance
    * need to conduct irradiance testing outside with real sun
==== Tasks ====    
  * Perform more tests of board under solar irradiance
    * in direct sunlight, see if board stops transmitting
  * Debug populated board 5
    * Some parts need to be swapped out
    * Continuity test of board 5
  * Create another spot on csv file for measuring voltage at XBee pin 
    * Will be used to look for ghost voltage
    * Nathan said we might not be able to do it : Correction we might be able to use it
    * Debug LED flag : turn on led and keep it on after Ghost voltage is perceived 
    * ADC6 might be able be a input chart
  * **Transmission Tests**
    * test adafruit charging chip indoors and outdoors
      * make sure output is good
      * LED behavior
      * behavior with irradiance
    * test our charging chip
      * behavior with irradiance 
      * LED behavior
      * Hopefully simply changing the charging chip will fix the problem
  * Look into power switching of charging chip
    * Tryston said that between 4.3 - 4.5V the board would be powered by the battery instead of the solar panel
  * Populate a new board as soon as new parts come in
  * Populate a board with charging chip
  * Charging chip debug LED tests
    * 1 - 5bit number to voltage tests
      * this is used to make sure that the charging chip follows tryston's charging chip behaviors
      * to be completed for adafruit charging chip and dragon fruit charging chip
      * 5bits = 31 in decimal
      * 0 = 3V
      * 9 = 3.9V
      * 13 = 4.3V
      * 20 = 5V
    * 2 - Use 3 debug LEDs to visually indicate when switching between solar panel and battery
      * LED 1 : Vload = Solar Panel 
      * LED 2 : 4.3 < Vload < 4.5   (around the voltage that Vload switches from Panel to Battery power)
      * LED 3 : Vload = battery mV
      * If all are off, then the load voltage is between 4.3V and battery voltage
      * Need to connect Vload to MCU
    * 3 - Use LEDs to flag Ghost voltage, low XBee voltage, and dropped transmission
      * LED 1 : Ghost voltage is 4V (this is much too high for XBee power)
      * LED 2 : XBee voltage at less than 2.7V (full range is 2.7 - 3.6V)
      * LED 3 : flag for transmission (we do not know how to do it yet)
      * Need to connect XBee power to MCU