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Michael Maier edited this page May 26, 2021 · 4 revisions

Notes about research topics

Cameras

Panasonic

Only camera brand that is supported right now by the robot (create issue for any other camera you like to use). REST API is used. Live view and current state (e.g. zoom) via UDP.

Sony

Not supported yet, but similar to Panasonic: Camera Remote API (REST). Live view via TCP. Current state only via REST request, e.g. long polling is required to get current zoom value, which is inaccurate due to latency.

Promising alternative: Multiport or LANC cable.

Canon

Transmitter

Wi-Fi

Small range, but fast. Is currently used for manual control and streaming live image.

Bluetooth 5 Long Range (Coded Phy)

Smartphone may be used as transmitter. Only a few models with decent support. Smartphones only have low transmit power.

According to this presentation:

Zusammenfassung

  • Im Moment gibt es noch keine zufriedenstellende Lösung mit coded PHY
  • Kleiner Gewinn in Büroumgebung
  • Kein Gewinn im Freifeld
  • Die gemessenen Werte sind weit weg von den versprochenen 12dB

Nachteile von Coded PHY:

  • Langsamere Kommunikation
  • 2-8 mal höherer Stromverbrauch
  • Risiko von Kollisionen mit anderen Funkgeräten steigt
  • Andere Funkgeräte werden eher gestört
  • Längere «Blindzeit» beim Central device

nRF24

Range of 1 km may be possible. Quite cheap. May be used to send GPS location of target and simple control commands.

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