weatherbox:bumblebee:bootloading_troubleshoot [Smart Campus Energy Lab Wiki]

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=== Troubleshoot Bootloading & FTDI Programming For: ===

 It should be noted that a no communication code 0x0000 could be a hardware or software issue. 
 fastest way to verify a hardware issue is attempting to boot load a known good device.

Bare Bumblebee (List steps to troubleshoot boot load issues on bare bumblebee)

Verified boot load settings in IDE with team Guava bread board. Had successful boot load.
Attempted boot load of Bumblebees bread board. No communication 0x0000 unknown device.
Switched known good Atmega328 chip from team Guava board to team Bumblebees board. Boot load

failed to communicate still.

Boot loaded Team Apples Atmega328 chip on team Guavas board. Successful boot load.
Removed all circuits not necessary for boot loading team Bumblebee board and attempted boot.

Verified circuits of bread board for boot loading Still no connection 0x0000.

Changed 16 mega Hz clock as a failed clock would result in no communication. Still 0x0000
Changed out two ceramic 22pF capacitors. Still no communication 0x0000.
Changed out 1uF capacitor. Polarity of capacitor between ground and reset

pin 1 appears to have been reversed.

  Attempted boot load with successful communication on team Bumblebees bread board.
  
Bumblebee 4.0 (List steps to troubleshoot boot load issues on bumblebee 4.0) 
  
    * Connected Bumblebee version 4.0 to IDE and attempted boot load. No communication unrecognized device 0x0000. 
    * Circuits where checked for continuity and shorts and all appear to be ok. 
    * Upon contacting lab mates a recommendation was made to changed Bod voltage from 2.7 volts 
      to 4.3 volts. After this successful communication was 
     established with Bumblebee version 4.0 and boot load appeared to take. 
    * Connected Bumblebee version 4.1 and attempted boot loading. No communication 0x0000.
    * Attempted to upload sketch to version 4.0 to verify boot load was successful with no success.

 Bumblebee 4.1 (List steps to troubleshoot boot load issues on bumblebee 4.0)
 
  * Connected Bumblebee version 4.1 to IDE and attempted boot load. No communication unrecognized device 0x0000. 
    * Circuits where checked for continuity and shorts and all appear to be ok. 
    * Bod voltage changed from 2.7 volts to 4.3 as with version 4.0 Bumblebee still no 
      communication 0x0000. 
    * Attempted to upload sketch to version 4.0 to verify boot load was successful with no 
     success. 
     At this point a sketch upload needs to be performed to version 4.0 to verify boot loading 
     was successful.

=== How to bootload PCB boards: ===

Open up board schematic & board layout (we used v4.0 but same process for both versions)
Determine correct ISP pins for bootloading
Connect ISP pins to Arduino Uno
Connect Arduino Uno to computer
Open Arduino IDE
Open Arduino ISP under: File→Examples→11.ArduinoISP→ArduinoISP
Upload code to Arduino Uno: Tools→Port→Port # (Arduino Uno)→Upload
Once upload to Arduino Uno is complete go to Tools and select correct configuration
Tools should have the following configuration (Note: We are using the MiniCore Library to setup bootload/FTDI programming upload)

Once completed, burn bootloader under tools
Once bootload is done with no errors move onto uploading code using the FTDI

=== Troubleshooting Bootloading Information:===

Arduino to a Microcontroller: https://www.arduino.cc/en/Tutorial/BuiltInExamples/ArduinoToBreadboard
Minicore Guide: https://github.com/MCUdude/MiniCore#wiring-reference
Circuit IO Guide: https://www.circuito.io/blog/atmega328p-bootloader/
Nick Gammon Bootloading: https://www.gammon.com.au/bootloader
More Nick Gammon: https://github.com/nickgammon/arduino_sketches

=== Updated Boot loading Procedure (February 7, 2022):===