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| 1 | +# Compatible RS485 Adaptors |
| 2 | + |
| 3 | +This page does not use affiliate links, please only use these links as a guide. Shop around for the best prices! |
| 4 | + |
| 5 | +## RS485 - USB |
| 6 | + |
| 7 | +### Generic RS485 - USB |
| 8 | + |
| 9 | + |
| 10 | + |
| 11 | +[Amazon UK Link1](https://www.amazon.co.uk/dp/B07K3V381Z), |
| 12 | +[Berrybase Link1](https://www.berrybase.de/raspberry-pi/raspberry-pi-computer/usb-geraete/usb-rs485-konverter) |
| 13 | + |
| 14 | +## RS485 - Ethernet |
| 15 | + |
| 16 | +Whatever adapter you buy, make sure it supports Modbus transmission. Transparent adapters that do not look into the Modbus protocol cannot send the packages to the correct Modbus slave. |
| 17 | + |
| 18 | +### [USR-N510 RS232/RS485/RS422 to Ethernet](https://www.pusr.com/products/1-serial-port-etherne-device-servers-usr-n510.html) |
| 19 | + |
| 20 | +Older version of the USR-N510 with DB9 connector supporting RS232/RS485/RS422 |
| 21 | + |
| 22 | +### [USR-W610 RS232/RS485 to Wifi & Ethernet](https://www.pusr.com/products/rs232/rs485-to-wifi-converters-usr-w610.html) |
| 23 | + |
| 24 | +Only Ethernet mode tested so far. |
| 25 | + |
| 26 | +[Amazon UK Link1](https://www.amazon.co.uk/dp/B07DNWM62H) |
| 27 | + |
| 28 | +### [Waveshare RS485 to RJ45 Ethernet DIN Rail Mount - RS485 TO ETH (B) / RS485 TO POE ETH (B)](https://www.waveshare.com/wiki/RS485_TO_ETH_(B)) |
| 29 | + |
| 30 | + |
| 31 | + |
| 32 | +[Amazon UK Link1](https://www.amazon.co.uk/dp/B09MQTP16W) , [Amazon UK Link2](https://www.amazon.co.uk/dp/B09LQMH2S1) , [Amazon UK Link3](https://www.amazon.co.uk/dp/B09QMNWYLQ) |
| 33 | + |
| 34 | +### [ZLAN5843A 8-port RS232/485 serial port to Ethernet](http://www.zlmcu.com/en/products_ZLAN5843A.htm) |
| 35 | + |
| 36 | + |
| 37 | + |
| 38 | +[AliExpress](https://www.aliexpress.com/item/32888961582.html) |
| 39 | + |
| 40 | +## Untested but should work according to the specs... |
| 41 | + |
| 42 | +### [USR-N510 RS485 to Ethernet](https://www.pusr.com/products/1-rs485-serial-port-etherne-device-servers-usr-n510.html) |
| 43 | + |
| 44 | +Newer version of the USR-N510 without DB9 connector supporting RS485 (Specs mention RS232/RS485/RS422 Optional) |
| 45 | + |
| 46 | +Should perform the same as the older version, although untested! |
| 47 | + |
| 48 | +### [USR-TCP232-410S RS232 / RS485 Serial to Ethernet Adapter](https://www.pusr.com/products/modbus-serial-to-ethernet-converters-usr-tcp232-410s.html) |
| 49 | + |
| 50 | + |
| 51 | + |
| 52 | +[Amazon UK Link 1](https://www.amazon.co.uk/dp/B07C1TC165) |
| 53 | + |
| 54 | +## Might work but potentially more hassle... |
| 55 | + |
| 56 | +### [USR-TCP232-304 only supports a Virtual Com Port?](https://www.pusr.com/products/1-port-rs485-to-ethernet-converters-usr-tcp232-304.html) |
| 57 | + |
| 58 | + |
| 59 | + |
| 60 | +As this Model appears to only gives you a Virtual Com Port it might prove difficult to pass into Home Assistant running in a VM or Home Assistant OS? |
| 61 | + |
| 62 | +[Amazon UK Link1](https://www.amazon.co.uk/dp/B07BC77L8K) |
| 63 | + |
| 64 | +## Non Working / Troublesome RS485 Adaptors |
| 65 | + |
| 66 | +### [Waveshare RS485 to WIFI/ETH](https://www.waveshare.com/wiki/RS485_TO_WIFI/ETH) |
| 67 | + |
| 68 | +This RS485 adaptor is very problematic: |
| 69 | +- There seems to be delayed communications, |
| 70 | +- Struggles to read more than 7 registers at a time, |
| 71 | +- Modbus Error: [Input/Output] Unable to decode request, |
| 72 | +- No ability to set "Auto query storage type" for Sofar Inverters. |
| 73 | + |
| 74 | +### [Waveshare RS485 to ETH](https://www.waveshare.com/wiki/RS485_TO_ETH) |
| 75 | +**Not to be confused with the DIN Rail mounted Waveshare RS485 TO ETH (B) mentioned above.** |
| 76 | +- This adaptor does not support "Modbus Transmission" it is a passive device. |
| 77 | +- You can't submit requests to the Inverter. |
| 78 | +- It does not work! |
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