Sunwoda

Supported Devices

Device Type	Modbus TCP (Ethernet)	RS485	Curtailment	Reactive power control
Oasis 180	✅	✅	❌	—
Oasis L261 All-in-ONe	✅	❌	❌	—

For correct ethernet wiring: Follow the the guidelines for ethernet wiring.

For correct RS485 wiring: follow the RS485 wiring guidelines.
If the wiring shown in the table below is incorrect, please let us know.
There is no general industry consensus on the use of A and B for RS485 polarity, so the naming may be counterintuitive for some devices.

SmartgridOne Controller model OM1	SmartgridOne Controller model IG8	RS485-USB converter	RS485-Ethernet converter
RS485 A	RS485_POS	RS485 A	TX+
RS485 B	RS485_NEG	RS485 B	TX-
RS GND	GND	Not available	G

If you are connecting through TCP, be sure that the device is configured to communicate with port 502.

You MUST give each device a unique address on the RS485 bus. Check the device manual for instructions.
Use lower addresses first (1, 2, ...) because the SmartgridOne Controller will find them faster!
For each device, it is generally recommended to keep the factory-default baud rate, parity, and stop bits. The SmartgridOne Controller will scan those first.

Last updated October 26, 2026

Device Type	Modbus TCP (Ethernet)	RS485	Curtailment	Reactive power control
Oasis 180	✅	✅	❌	—
Oasis L261 All-in-ONe	✅	❌	❌	—

For correct ethernet wiring: Follow the the guidelines for ethernet wiring.

For correct RS485 wiring: follow the RS485 wiring guidelines.
If the wiring shown in the table below is incorrect, please let us know.
There is no general industry consensus on the use of A and B for RS485 polarity, so the naming may be counterintuitive for some devices.

SmartgridOne Controller model OM1	SmartgridOne Controller model IG8	RS485-USB converter	RS485-Ethernet converter
RS485 A	RS485_POS	RS485 A	TX+
RS485 B	RS485_NEG	RS485 B	TX-
RS GND	GND	Not available	G

If you are connecting through TCP, be sure that the device is configured to communicate with port 502.

You MUST give each device a unique address on the RS485 bus. Check the device manual for instructions.
Use lower addresses first (1, 2, ...) because the SmartgridOne Controller will find them faster!
For each device, it is generally recommended to keep the factory-default baud rate, parity, and stop bits. The SmartgridOne Controller will scan those first.

Last updated October 26, 2026