Mikrosilver’s video provides additional information and a detailed setup guide:

The ADA485 is an easy-to-install RS485→IP (Wi‑Fi/LAN) bridge and edge gateway. It reads and writes Modbus RTU, publishes to MQTT/HTTP/REST, logs to CSV/JSON, and works immediately with systems like Home Assistant/smartmeter.hu/hmke.app. Ideal for inverters (Deye/Sunsynk, Fronius RS485), BMS units (SEPLOS, Basen), PZEM devices, heat pumps, boilers, PLCs.

WARNING! Power supply not included!
The ADA485 is the GreenHESS ADA-ecosystem’s RS485/Modbus TCP/Modbus gateway device. Its purpose is to connect meters/controllers accessible via the standard Modbus RTU line to the home or industrial IP network, even locally without cloud.

Main uses:

• HMKE solar energy systems: real-time monitoring and control of inverter, smart meter, BMS.

• Heating-cooling: heat pump, boiler, buffer tank, heat meter on RS485.

• Industrial/building automation: PLC, frequency converter, temperature/pressure transmitters, PZEM, etc.

- DOCAN 600Ah
- DOCAN 900Ah
- EASUN (M16S100BL-V)
- Gobel PC200.485
- GreenBULL (GB16280)
- Hailei (HL-PW4810016S)
- JKBMS (14CELL-B2A24S20P)
- JKBMS (EJ-JK-B2A24S20P)
- SEPLOS 280Ah (16S200A)

Features:

• Modbus RTU master: reads/writes, multiple slaves on one bus, scheduled polling.

• Modbus TCP client (over LAN): fast polling without RS485.

• HTTP/REST pull + JSON-path: extracting and normalizing arbitrary API fields.

• RS485 ASCII frames: ascii/hex/hextoascii template + optional frame suffix.

• Real-time remote access: MQTT publishing and on-demand querying via the local API.

• MQTT and HTTP/REST output: EMQX/Broker → dashboards (smartmeter.hu, hmke.app, Home Assistant, Grafana, Node-RED).

• JSON-based “protocol description”: combining multiple request-response pairs into one common object (e.g. inverter + BMS → one payload).

• Edge computations: scaling, signed interpretation, derived metrics (e.g. batt_i_charge, batt_i_dis).

• Logging: CSV and JSON logged locally; periodic push to server.

• Web configuration: captive portal + admin UI (Wi-Fi, MQTT, query profiles).

• OTA: firmware updatable via browser.

• Compact: DIN rail/distribution box fitting design, clear A/B/GND connection.

  
  

Quick setup (5 steps)

1. Wiring: RS485 A/B/GND → to meter/inverter bus (A-A, B-B; polarity matters). 120 Ω termination recommended at bus end.

2. Power: connect power to ADA485 (according to label range – typically 5…24 V DC).

3. Wi-Fi: connect to ADA485 AP with phone/tablet → web configuration (SSID, password).

4. MQTT/REST: specify broker address or local API endpoint.

5. Profile: select/load ready Modbus profile (e.g. Deye SUN-xK-SG04LP3-EU), save, START.

Wiring

RS485 basic rules

• Two-wire shielded twisted pair recommended (e.g. LiYY/UTP): A(+) ↔ A(+), B(−) ↔ B(−).

• A common GND reference often increases noise immunity (if the device allows).

• The bus should have a 120 Ω termination at both ends; bias (pull-up/down) usually at a single point, near the master.

Pinout example (terminal block):

• RS485-A (signal +)

• RS485-B (signal −)

• GND (optional reference)

For RJ45 port, always follow the device labeling; there is no universal RJ45 standard for RS485.