Update content/hardware/07.opta/opta-family/opta/tutorials/03.getting-started-with-modbus-rtu/content.md

Co-authored-by: TaddyHC <94547080+TaddyHC@users.noreply.github.com>

Author: jcarolinares

content/hardware/07.opta/opta-family/opta/tutorials/03.getting-started-with-modbus-rtu/content.md

@@ -36,7 +36,7 @@ The Modbus RTU protocol is one of the protocols available within Opta™. In thi
 
 ### Hardware Requirements
 
-- [Opta™ PLC with RS-485 support](https://store.arduino.cc/products/opta-wifi) (x2)
+- Opta™ PLC with RS-485 support: [Opta™ RS485](https://store.arduino.cc/products/opta-rs485), or [Opta™ WiFi](https://store.arduino.cc/products/opta-wifi) (x2)
 - 12 VDC/1 A DIN rail power supply (x1)
 - [USB-C® cable](https://store.arduino.cc/products/usb-cable2in1-type-c) (x1)
 - Wire with either specification for RS-485 connection (x3)