Dedicate output for advance telemetry

• Attitude / Orientation
• Internal State
• Raw sensor data

Maybe dedicated SPI pin

• SWDIO
• SWDCLK
• NRESET

https://yaqwsx.github.io/Pinion/

Selected footprint did not pass JLCPCB inspection.

The STM32F302 on the REV-A board supports CAN. It may be useful to communicate with CAN across shields.

Over all form factor will make more sense.

PWR -> Amber
STAT1 -> Red
STAT2 -> Green

Depends on what's available in LCSC

Add a reset monitor IC to hold the MCU in reset until the correct logic voltage level is reached. Some of these ICs come with a watch mechanism built in to reset the MCU if an IO line was not toggled within a timeout window.

Depends on supply.
Will help for state estimation.

Options

• BMM150 (LCSC: C171681)

Shield for diff-drive motor control

Driver options:

• DRV8837 (LCSC: C191000) / DRV8838

30.5mm is less common on micro quad frames it seems

Options

• 20.5mm
• 25.5mm
• 30.5mm

Prefer not to hand solder if possible.

Design a simple frame for the controller to sit in with the rotors at the corners.

Is the F302 sufficient?

Need to verify there is enough flash memory space to use an RTOS. See: nnarain/icarus-firmware#9

A tad bright..

Shield footprint is defined in kicad-inventory and is shared with Kratos-PDB.

Too bright...

Looks like it is always applying a voltage to BATT.

AMS1117-3.3 was picked for availability. It can output ~800mA, which is unnecessary. A smaller regulator could be selected to reduce the amount of space used on the board.

Could be used for rich fault indications.

It's also cooler..

Options:

• MPL3115A2R1
• BMP388 (LCSC: C779278)

Initial printing of device info that the esp does at start up causes the stat led to go full brightness. Application firmware will immediately change it, but would be better if it was not on the serial tx pin.

Add documentation for the board

• Logs / Blackbox
• Configurations