Attended: Kevin, Gordon, Tyler, Kaeo

• Working with Allie to get debug LEDs up and running
• 3.3 Voltage Regulator was thought to be faulty on board 5
  • Regulator still didn't output anything when part was replaced
  • Tested other pins, and found out the enable pin was also zero
  • XBee Vreg takes XBEE_EN from MCU as the enable value
  • Sensor 5V Vreg takes SENS_EN from MCU, and is working find
  • We conclude that the reason for this problem is most likely because MCU is not coded correctly, and is not set to enable the XBee voltage regulator
• Updated bill of materials for version 2
• Waiting on key to use roof for testing

• Lost XBee, using another one
• XBee unable to communicate with gateway
• Unable to go to roof because

• Didn't program MCU to work with LEDs
• Didn't get XBee to work (will try with Dylan tomorrow)
• Discussed possible debug options
  • First, confirm whether dropped packets are attributed to low XBee power or high XBee power
    • LED to say if voltage was too low or too high
    • Time stamp the time it occurred
  • Further test XBee to see other cases when it shuts off
  • XBee off/sleep
    • Currently connected to MCU but not programmed
    • Unsure if this is what might be shutting off XBee or not
  • Look into gathering data on an external source to cross reference with data gathered on gateway

• Set up all reference pins to observe changes in data on roof
• 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
    • 00000 = 0 = 3V
    • 01001 = 9 = 3.9V
    • 01101 = 13 = 4.3V
    • 10100 = 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

Contributing authors:

Created by tyamauchi on 2017/04/25 03:16.