Order sample from Amazon:
USR-N510-H7-4 RS485 Port Modbus to MQTT IoT Gateway can realize bi-directional transparent transmission between RS485 and network.
Package: 1PCS *USR-N510-H7-4
1 PCS * Adapter
● 1-port 485 Modbus Gateway (3-in-1 serial port RS232/RS485/RS422 Optional)
● Wide voltage input range DC 5-36V
● Modbus RTU to Modbus TCP, Modbus Polling, Modbus to JSON
● Flow control XON/XOFF
● Secure Client Operation Mode: TCPS, HTTPS. MQTTS
● SSL/TLS Encryption
● Modbus RTU Master, Edge computing