eBUS Adapter Stick C6

eBUS Adapter Stick C6 provides an interface to a 2-wire eBUS with galvanic isolation and thus enables communication with an eBUS enabled heating, ventilation or solar system.

It is the smaller USB-stick like version of the previous adapter v5 sharing the very same technology with even smaller footprint (42x16mm), pluggable eBUS connection, on-board WIFI by using an ESP32-C6, support for USR-ES1 Ethernet module, and including a white enclosure.

Please refer to the documentation page for all details: adapter.ebusd.eu/v5-c6/stick

In comparison to its “big brother” C6 Shield the Stick C6 is smaller, no longer pluggable onto a Rasperry Pi, and has less pin headers, as these were rarely used anyway.

The v5 version of this interface was born to life early 2023 after several rounds of prototyping and is already in use by thousands of people. Since then, multiple design optimizations were performed including an eFuse for over voltage+current protection, and USB-C connection starting with the C6 version.

Features

• Full galvanic isolation with zero power drawn from eBUS (class 0 as of eBUS specification)
• Flexible host connection via:
  • USB (builtin)
  • WIFI (builtin) with onboard PCB antenna
  • Ethernet (with addon module USR-ES1, see below)
• Full support for ebusd enhanced protocol
• Web-based configuration and updatability by free-of-cost firmware
• Optional connection to sensors
• Optimized and built for use with ebusd

Specifications

• PCB: 4-layer SMD+THT, HASL lead free
• Chip: ESP32-C6 with onboard antenna
• Host/Power connector: USB-C (cable available as option)
• eBUS connector: pluggable 3.5 mm (plug included), polarization does not matter
• Dimension: 42mm x 16mm (without antenna/connectors/enclosure), 45mm x 19mm (with enclosure, without connectors)
• Enclosure: Photosensitive resin
• Operating voltage: 5V
• Operating current: <120mA with WIFI
• Protection: eFuse for over voltage and current protection
• Testing/QA: every adapter is fully tested under real conditions with an eBUS power source and communications
• Certification: tested to meet all requirements for CE marking

Addons

• USB-C cable/adapter/power supply: for power and/or communication to the host, e.g. this one or this one with power supply or this tiny adapter
• USR-ES1 module: for Ethernet connectivity, available as option, see above (no warranty and/or refund for this option; this is only made available for your convenience) or available from here (optional)
• Enclosure: already included