Pixhawk Meeting - March 31, 2020 #bms #payload-bus #ref-standard #coordination


Ramon Roche
 

Pixhawk Standard

@David: highlights the need for detailed  version control on the spec.

Feature Request

  • Up to the pin level change history

  • Consensus

  • Sortable By functionality and type

  • Versioning


Default Sensors

ICM4XXX 4-series on paper looks better, lower temp

  • @TODO: Ray: follow-up feedback from ModalAI

Payload

How to make this complete

  • Datasheet with all of the specs

  • Defined the mechanical and electrical properties

  • Description of what pins are and how they are used

  • Typical test arrangements for those pins

  • Part number breakdown glossary

  • Description of how to use this reference


How to name connectors

  • How to differentiate between

  • The documentation doesn’t specify 

  • Group agrees tying it to a physical feature would be the best way to go


Options

By number of pins (# Pins)

PX-PB-40

PX-PB-35


R/D

PP-40D

PP-40R


Power and Watts

PP-PB XW

PP-PB XW


Options

  • # Pins

  • R/D

  • Power and Watts



Payload DevKit 

Group agrees a DevKit with a breakout board would be really useful


  • Yuneec will make one available

  • Minimal working kit for the connector

  • Hoping to release it in May


@TODO: Yuneec needs a prototype of the dovetail.


Discussion regarding connector which one should be in the vehicle vs camera (female / male)


@TODO: is it too late to swapp Yuneec.

@TODO: Document data sheets of pins, from a protocol use standpoint, max min voltage, gpps as output/input, ppm compatible

@TODO: Who is going to be a provider of DoveTail design Dev Kits?

Smart Battery


Ark Electronics BMS Prototype by Alex K.

  • Shared photos of the 1st prototype already working

  • Gettings quotes for prices

    • BOM ~$100 USD


@TODO: add state diagram to main doc and link


How to make this complete

  • Datasheet with all of the specs

  • Defined the mechanical and electrical properties

  • Description of what pins are and how they are used

  • Typical test arrangements for those pins


@TODO: Question; Part numbering? Voltage related standard


Starting with a single mechanical interface

Battery info, Capacity, Number of cells

Uavcan v0 capacity is available

Public data types should be part of the standard


@TODO: Alex, what are all the things we want to get out of the battery for UAVCAN v1.0


Iain G. @ NXP 

Proposes UMP connector by TE Connectivity

  • Data sheet PDF

  • Next version of the board is available now with published schematics