High-Flying Solar Plug dongles

From experience, the RWB1-01/04 is a Voltronic variant dongle. So units with these dongles should be able to connect to SolarAssistant using the Voltronic protocol and pin configuration.

Models

Three main models are available, differing by their inverter-side connector:

• Solar Plug-SWB1 — WiFi dongle with an external antenna and a DB9 or Aviation port. Looks like a Solarman dongle
• Solar Plug-RWB1 — Compact WiFi dongle with an RJ45 plug, is a Voltronic dongle
• Solar Plug-CWB1 — WiFi dongle with a USB port

Each model is available in sub-variants (e.g. -01, -50) that determine which serial protocol and pin arrangement is used. Make sure the sub-model matches your inverter's port.

Solar Plug-RWB1 — RJ45 pin definitions

The table below lists the RJ45 pin assignments for each sub-model of the Solar Plug-RWB1. RS232 variants use sub-models -01 through -06; RS485 variants use -50 through -53.

Sub-model	Interface	PIN 1	PIN 2	PIN 3	PIN 4	PIN 5	PIN 6	PIN 7	PIN 8
-01	RS232	RXD	TXD	VCC	NC	NC	NC	NC	GND
-02	RS232	TXD	RXD	VCC	NC	NC	NC	NC	GND
-03	RS232	TXD	RXD	NC	VCC	NC	NC	NC	GND
-04	RS232	RXD	TXD	NC	VCC	NC	NC	NC	GND
-05	RS232	RXD	GND	TXD	VCC	NC	NC	NC	NC
-06	RS232	NC	VCC	RXD	NC	GND	TXD	NC	NC
-50	RS485	GND	GND	RS485 B−	VCC	VCC	RS485 A+	NC	NC
-51	RS485	RS485 A+	RS485 B−	NC	VCC	NC	NC	NC	GND
-52	RS485	VCC	GND	NC	NC	NC	NC	RS485 A+	RS485 B−
-53	RS485	RS485 B−	RS485 A+	NC	VCC	NC	NC	NC	GND

Solar Plug-CWB1 — USB pin definitions

The Solar Plug-CWB1 uses a USB connector with 4 pins numbered 1–4 (right to left as viewed on the plug). The table below lists the line assignments per sub-model.

Sub-model	Interface	Serial port type	Line A / T / +	Line B / R / −	Line VCC / +	Line GND / −
-01	USB	RS232	VCC	RXD	TXD	GND
-02	USB	RS232	VCC	TXD	RXD	GND
-50	USB	RS485	VCC	A+	B−	GND
-51	USB	RS485	VCC	B−	A+	GND