We help you choose the right device for your system Ask an expert →
Products Blog Help Contact
EN HU

Smart energy, made clear

Take full control of your energy.

Monitor your solar system, consumption and grid flow in near real time – anywhere, anytime with the ADA P1 Meter!

✓ Near real-time data updates every 10 seconds.
✓ Compatible with smart meters featuring a DSMR5-compatible P1 port.
✓ Ready to use in just a few minutes.
✓ Also operates as an MQTT client.
✓ Local JSON and Telegram output.
✓ Integration with Home Assistant (HACS), Domoticz and EVCC.
View products → Help me choose
hmke.app energy monitoring application

Featured products

Communication devices for smart electricity meters

Upgrade your electricity meter with a single compact device.
ID 50 ADA P1 Meter - smart meter for electricity meter +15 cm RJ12 data cable

GreenHESS

The device collects nearly 40 data points (consumption, feedback, phase parameters, reactive energies, etc.) from the meter and transmits them on MQTT, Home Assistant, JSON API endpoints, to the cloud or local network. Thanks to the JSON API output, it ca

51.78 €
ID 55 ADA P1 Bridge (ESP32 modul)

GreenHESS

Already have a HomeWizard P1 or other P1 meter? The ADA Bridge connects local telegram data to the GreenHESS cloud, MQTT, and Home Assistant – simply, in 3 minutes.

43.56 €
ID 56 ADA485 – RS485/Modbus & TCP/Modbus IoT bridge for HMKE and industrial devices

GreenHESS

Mikrosilver 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 is immediately usable with Home Assistant/smartmeter.hmke.app/hmke.app systems. Ideal for inverters (Deye/Sunsynk, Fronius RS485), BMS (SEPLOS, Basen), PZEM meters, heat pumps, boilers, PLCs. New feature: it also emulates a DTSU666 electricity meter in Modbus RTU slave mode — so when connected directly to the Deye inverter's 2Meter port, it regulates feed-in power without a physical meter based on P1 smart meter data. WARNING! Power supply and USB cable not included!The ADA485 is the GreenHESS ADA ecosystem’s RS485/Modbus TCP/Modbus gateway device. Its task is to connect meters/controllers available on the standard Modbus RTU line locally, even without the cloud, to the home or industrial IP network. Main uses: HMKE solar energy systems: real-time monitoring and control of inverter, smart meter, BMS. Heating-cooling: heat pump, boiler, buffer tank, heat quantity meter over RS485. Industrial/building automation: PLC, frequency converter, temperature/pressure transmitter, PZEM, etc. Smart Meter replacement: DTSU666 emulator for Deye/Sunsynk inverter 2Meter port — without a physical electricity meter. Communicates with any device designed for RS485 Modbus data communication. Currently compatible with the following batteries and BMS units, with ongoing expansions: Battery Systems & BMS11 dbBasenGreen 628Ah (JK PB2A16S20P)DOCAN 600AhDOCAN 900AhEASUN (M16S100BL-V)Gobel PC200GreenBULL (GB16280)Hailei (HL-PW4810016S)JKBMS (14CELL-B2A24S20P)JKBMS (EJ-JK-B2A24S20P)JKBMS 300Ah (PB2A16S20P)SEPLOS 280Ah (16S200A)EV Chargers & EVSE Controllers1 dbVoltieHeat Pumps & HVAC Controllers2 dbHajdu HPAWMidea M-ThermalPV Inverters & Hybrid Inverters6 dbDeye SUN-xK-SG04LP3-EUemptyFronius Symo (TCP int+SF)Growatt x000UEHuawei SUN2000 (TCP)SigenergyUtolsó frissítés: 2026. 08. 20. 16:35:03 Features in detail Communication channels Modbus RTU master: read/write, multiple slaves on one bus, scheduled queries, on-demand command sending. Modbus RTU slave (new!): acts as a data provider itself — with Eastron SDM630 (FC04) or CHNT DTSU666 (FC03) emulation. Modbus TCP client (on LAN): fast polling without RS485, supports persistent connection. Solarman protocol: native Solarman V5 frame support for Deye/Sunsynk inverters (serial number based). HTTP/REST pull + JSON-path: extract and unify arbitrary API fields. RS485 ASCII frames: ascii/hex/hextoascii template + optional frame suffix. MQTT publish/subscribe: real-time data and remote control (set-mode, get-status, get-config, raw send) to EMQX broker. Edge processing and calculations Scaling and signed number handling: divider, mask, signed/unsigned, two's complement, byte order (BE/LE). Computed fields: expression-based derived values (e.g. batt_i_charge, batt_i_dis, phase sums, P/U/I conversions). Multiple requests → one payload: e.g. inverter + BMS data into a single JSON object. Field-level send-enable (adasend): select keys for MQTT publishing. Cache and state management: preserves last valid data, gate conditions to filter incomplete data. Web administration Captive portal Wi-Fi setup: on first start switches to AP mode, configurable from phone. Built-in protocol editor: CodeMirror-based JSON editor for live profile editing. Encrypted protocol files: shipped profiles obfuscated with VB-style and decryptable with key. Live data interface: displays phase voltages, currents, powers, energies, frequency. Modbus traffic decoder: last request/response hex dump and register-level interpretation (name + unit + decoded float value). Event log: MQTT send/receive timeline, acknowledged commands, errors. Operation OTA updates: via browser or automatic pull from firmware.greenhess.com. Logging: local CSV and JSON logs (LittleFS), periodic push to server. Fault tolerance: watchdog reset, automatic reconnection after Wi-Fi/MQTT loss, persistent configuration in flash. Multitask architecture: ESP32 dual-core utilization — network operations (HTTP, MQTT) and Modbus slave responses run on separate CPU cores with priority-based FreeRTOS scheduling. Ensures time-sensitive polling devices (e.g. Deye inverter 100 ms 2Meter polling) get timely response. Smart Meter emulation (DTSU666 / Eastron mode) One of the most special features of ADA485 firmware is the Modbus RTU slave mode: the device itself becomes the electricity meter for the inverter, without a physical DTSU666 or Eastron SDM630 meter. It reads data over Wi-Fi from the P1 smart meter (okosvillanyora.local) JSON API, then serves the inverter in the expected Modbus RTU format over the RS485 bus. Typical use: where a smart meter already exists (with P1 dongle), no separate DTSU666 meter purchase is needed for the Deye 2Meter port. ADA485 implements both data collection and meter emulation in a single device. Selectable protocols EASTRON SDM630 mode (FC04 — Read Input Registers) SI base units: V, A, W, Hz, kWh — directly as IEEE754 float. Complete register map in range 0x0000-0x0164: phase voltages, currents, active/reactive/apparent power per phase and total, PF, frequency, import/export energy, line-line voltages. No scaling issues — native SDM630 compatibility. CHNT DTSU666 mode (FC03 — Read Holding Registers) Official CHINT DTSU666 ModBus protocol v1.5 register map. Instantaneous measurement block: 0x2000-0x2030 (Uab/Ubc/Uca, Ua/Ub/Uc, Ia/Ib/Ic, Pt/Pa/Pb/Pc, Qt/Qa/Qb/Qc, St/Sa/Sb/Sc, PFt/PFa/PFb/PFc). Frequency: 0x2044. Energy block (official address): 0x4000 (ImpEp), 0x400A (ExpEp), 0x4014 (ImpEq), 0x401E (ExpEq). Backward compatibility: addresses 0x101E/0x1028 of Huawei DTSU666-H also supported. Scaling profiles Different Deye firmware versions may expect different scalings on the same registers. To handle this, three preset profiles are available in CHNT mode, offering solutions for most cases without parameterization: DTSU666 classic (default): factory CHINT scaling — V×10, I×1000, P×10, Q×10, PF×1000, Hz×100, energy in native kWh. Works with most 2024+ Deye firmware. Native SI: all values directly in SI base units — V, A, W, Hz, kWh. Expected by some newer firmware builds. Custom: multipliers for 7 field groups (V, I, P, Q, PF, Hz, E) can be individually set, if neither DTSU666 classic nor Native fits. Live diagnostic tools Modbus traffic decoder: web interface shows last inverter request (address, FC, register range) and ADA485’s response — with register names, units, "wire" values and calculated SI values. Enables rapid detection of scaling errors. Test mode: P1 polling can be temporarily disabled and fixed values injected towards the inverter (e.g. P_L1=-500W, P_L2=+1000W, P_L3=-1500W). This verifies exact values shown on inverter display, essential for calibration and installation validation. Statistics: counters query_count, query_ok, query_fail, P1 fetch success, last request timestamp. Frequency sanity check: if P1 source gives 0 Hz (some smart meters behave this way), firmware automatically sends 50 Hz to prevent meter error on inverter. Remote configuration All parameters of meter slave mode (protocol, P1 host/port/path, slave address, fetch period, scaling profile, custom multipliers, test values) can also be set via MQTT, not only through the web interface. This allows configuring multiple ADA485 units remotely or automatic switching for different inverter types from a supervisory system. Quick installation (5 steps) Wiring: RS485 A/B/GND → meter/inverter bus (A to A, B to B; polarity matters). 120 Ω termination recommended at bus ends. Power: connect ADA485 power supply (according to range on label – typically 5…24 V DC). Wi-Fi: connect to ADA485 AP from phone/computer → web setup (SSID, password). MQTT/REST: enter broker address or local API endpoint. Profile: select/load ready Modbus profile (e.g. Deye SUN-xK-SG04LP3-EU), save, START. For meter slave mode: select CHNT DTSU666 or Eastron protocol, enter P1 meter address, choose scaling profile. Wiring RS485 basic rules Two-wire, shielded twisted pair recommended (e.g. LiYY/UTP): A(+) ↔ A(+), B(−) ↔ B(−). A common GND reference often improves noise immunity (if device allows). 120 Ω termination at both ends of bus; bias (pull-up/down) usually at one point, near the master. Example pinout (terminal block): RS485-A (signal +) RS485-B (signal −) GND (optional reference) For RJ45 port always follow device labeling; there is no universal RJ45 standard for RS485.

68.20 €
ID 51 ADA P1 Meter Cable 35 cm

GreenHESS

Straight connection 35 cm long data cable for ADA P1 Meter and compatible devices.

3.90 €

Real experiences

What our customers say

They have already tried it and shared their experience. Now discover what the ADA P1 Meter and hmke.app can do together.
Loading reviews…
Digital monitoring of a solar energy system
Modern, customisable interface Near real-time data at home and on the go.

Expert guidance

Not sure which device you need?

The ADA P1 Meter connects directly to your smart electricity meter. It is designed to collect and forward data from smart meters deployed across the European Union that provide a DSMR5-compatible P1 user interface. Access to the P1 connector on the front of the meter and an available 2.4 GHz Wi-Fi network are required.

Confirmed compatible smart meter models include, but are not limited to:
Sanxing SX601 S12U16, Sanxing SX631 S34U18, Sanxing SX601 S12U26, Sanxing SX631 S34U28, Sagemcom MA105, Sagemcom MA304, Sagemcom MA110M, Sagemcom MA309M, Holley DDSD285, Holley DTSD545, Wasion aMeter100, Wasion aMeter300
Ask for help →
  1. 01
    What would you like to use it for?
    ✓ Monitoring your home's energy use?
    ✓ Monitoring a solar energy system?
    ✓ Finding an appliance that is consuming too much energy?
    ✓ Displaying live inverter data?
    ✓ Seeing exactly how much energy you import from and export to the grid?
  2. 02
    Is your meter cabinet sealed?
    No problem. Contact your metering operator or energy supplier and ask how the customer P1 interface can be enabled or made accessible. The P1 port is a customer data interface; availability and activation procedures may vary by country and local operator.
  3. 03
    How can you store and use your data?
    The ADA P1 Meter gives you several options:
    ✓ It runs its own web server on your local network and publishes the available data every 10 seconds.
    ✓ It also works as an MQTT client, allowing you to send data to your own broker.
    ✓ Use our free HMKE.APP interface. If you want more detailed consumption analysis, custom reports or access to historical data, an optional cloud data-retention subscription is available. Cloud storage costs EUR 4.40 per month. With an annual subscription, two months are included at no extra cost, making the annual fee EUR 44.