Device makers and application developers gain a step-by-step handbook for building Sendspin products. It expands the former single-page guide into separate paths for clients that receive audio and servers that coordinate playback, with worked examples and an ESPHome starting point.
Marcel van der Veldt covers pairing choices for different hardware, encryption, timing, volume control and the screens a server should present. A single-page view can be printed to PDF. The handbook explains the protocol rather than replacing its specification, which remains the authority for its rules. Paulus Schoutsen reviewed the work.