Main/OneNote/OSD/CarrierBoard/Debugging V0.1.2.md

Preparation

• How to integrate sara chip. Get LTE-M sim-cards.

• Testing Protocol: Define exactly what tests are being done and why and write everything down.

• How can I use JTAG?

• Buy Heat camera

Todo Working Verification:

1. • Visual Inspection. Are all parts at the right place?
2. • Power Inspection. Hook up 5V supply and test all power rails.
3. • LED inspections. Are the LED's working as expected?
     No. Orange led is to weak. Blue led is always on, without network connection.
4. • See if coral works. Can I ssh into it?
5. • Test connectors. USB-A, USB-C
6. • Test connection through UART-pins to flight controller
7. • Test fan: Does it work properly?
8. • Test SARA-Chip. Does it boot? Can I communicate with coral? Read instructions carefully.
9. • Test arducam with google coral: Is a custom driver needed?
     It has not worked so far.
10. • Test Usb-cams with coral: does this work?
      Yes it worked without any problems.
11. • Test both UART connections: do they send what you want?
12. • Is I2C working properly?
13. • Use JTAG to verify proper functionality:
14. • Is WIFI and Bluetooth working properly, or is it interfering with something?

Todo Performance Testing:

1. Compare different antennas: All for the same SARA and then do bandwidth test in different conditions: Indoors, Outdoors, underneath trees, between skyscrapers, around glass, etc.
2. Compare usb plugs on both sides: Is there a bandwith difference? Use iPerf for testing
3. Test connection between corals through usb-c: does it work? What bandwitdth? Compare to 2 devboards.
4. Measure current draw of the whole board
5. Is airflow from drone enough? Measure temperature.
6. Heat camera: look at thermal performance of pcb. Are there areas where it can be improved

Possible fixes for problems:

Quickly make intermediate board: double sided with coral connectors. Like that you can access the pins that are hidden.

Questions:

• Why is orange led so weak?