⚡ Reduxi Controller · Technical Documentation
Supported Protocols & Interfaces
Which interfaces each Reduxi device has, and which communication protocols the Reduxi system supports – plus what Reduxi Converters add.
📋 In this article
1 Overview
The Reduxi Controller and P1 Ultra converters talk to meters, inverters, batteries, EV chargers and heat pumps over a range of physical interfaces and protocols. This page lists what is supported today and what is on the roadmap. Where a protocol has its own article, it is linked directly in the tables below.
9Physical interfacesEthernet, Wi‑Fi, LTE, RS485, DI, relays, M‑Bus, CAN, P1
14Communication protocolsFrom Modbus and DLMS to OCPP, MQTT and EEBus
4Converter optionsM‑Bus, TTL, EMS‑Bus and eBus to RS485
Looking for a specific device? This article covers Reduxi hardware and protocols, not third‑party devices. To check whether your meter, inverter or charger is supported, see the List of supported devices.
2 Interfaces by device
Which physical interfaces are built into each Reduxi device, including the Reduxi Gateway as system extension. Interfaces a device doesn't have can often be added with a Reduxi Converter, the Reduxi Gateway or an external Shelly Pro device.
| Interface | Controller / DIN | Controller Industrial | P1 Ultra Plus | P1 Ultra Pro | Gateway |
|---|---|---|---|---|---|
| Ethernet (RJ45) | 2×1 Gbps WAN + 100 Mbps LAN | 2×1 Gbps WAN + 1 Gbps LAN | — | — | 1×10/100 Mbps |
| Wi‑Fi | ✓2.4 / 5 GHz | ✓internal antenna | ✓ | ✓ | ✓2.4 / 5 GHz |
| Mobile (4G/LTE) | ✓PRO version, external antenna | ✓external antenna | — | ✓SIM slot, external antenna | — |
| RS485 | 1×more via Gateway | 2× | 1×for additional devices | 1×for additional devices | 1× |
| Digital inputs | —via Gateway / Shelly Pro | 6× | — | — | — |
| Relay outputs | —via Gateway / Shelly Pro | 4× | — | — | 2× |
| Current‑transformer inputs | —via Gateway | — | — | — | 3× |
| M‑Bus (wired) | —via Converter | ✓1× master + 1× slave | ✓2‑wire, RJ12 or RJ45 | ✓2‑wire, RJ12 or RJ45 | — |
| CAN | —via Controller Industrial | 1×2× version available | — | — | — |
| P1 / HAN / I1 (TTL) | —via P1 Ultra / Converter | —via P1 Ultra / Converter | ✓RJ12 | ✓RJ12 | — |
| Power supply | 5 VUSB‑C adapter / DIN‑rail PSU | 24 V DC | see device article | 12–24 V DC | |
| Documentation | Setup guide | Technical manual | P1 Ultra Plus / Pro guide | Gateway manual | |
Reduxi Controller DIN, PRO & Reduxi Gateway The Reduxi Controller DIN has the same interfaces as the stand‑alone Reduxi Controller, just in a DIN‑rail housing. The Reduxi Controller PRO adds 4G/LTE with an external antenna. Every system can be extended with the Reduxi Gateway: it adds one more RS485 port (RS485 → TCP/IP via LAN or Wi‑Fi, also for devices too far away for a direct cable), two relay outputs (e.g. SG Ready / EVU contacts) and three current‑transformer inputs.
3 Physical interfaces
The physical layer defines how a device is wired or connected. For which device has which interface, see Interfaces by device.
Available supported today · Coming soon on the roadmap · Via add‑on needs an external device
| Interface | Status | Typical use & related article |
|---|---|---|
| Ethernet (LAN/WAN) | Available | Internet connection and local network devices (Modbus TCP, REST, OCPP) · Reduxi Controller 2.0 Network settings |
| Wi‑Fi | Available | Wireless connection to the local network; P1 Ultra Plus / Pro send meter data via Wi‑Fi · Network settings |
| Mobile (4G/LTE) | Available | Mobile internet where no LAN or Wi‑Fi is available – Reduxi Controller PRO, Controller Industrial and P1 Ultra Pro · P1 Ultra Pro LTE setup |
| RS485 (EIA‑485) | Available | Wired serial bus for Modbus RTU devices such as meters and inverters · Wiring, cable types and connection diagram |
| Digital inputs / relay outputs |
Available Via add‑on |
Switching contacts, e.g. EVU/SG Ready for heat pumps. Built into the Controller Industrial (6× digital inputs, 4× relays); for the Reduxi Controller / DIN via the Reduxi Gateway or a Shelly Pro · Connect any heat pump via EVU contact |
| M‑Bus (wired) | Available | Meters with M‑Bus interface – built into Controller Industrial and P1 Ultra Plus / Pro · P1 Ultra Plus / Pro with energy meter |
| P1 / HAN / I1 (TTL) | Available | Smart meter customer interface via P1 Ultra Plus / Pro · P1 Ultra Plus / Pro with energy meter |
| CAN | Available | Via the Controller Industrial (1× CAN, 2× CAN version available) · No article yet |
4 Communication protocols
The communication layer defines the "language" the controller and the device speak over the physical connection.
Fieldbus & meter protocols
| Protocol | Status | Typical use & related article |
|---|---|---|
| Modbus (RTU) | Available | Inverters, meters and batteries over RS485 · Connecting devices to Reduxi Controller · Modbus slave connector |
| Modbus TCP | Available | Network devices over LAN/Wi‑Fi · Example: KEBA KeContact P30 via Modbus TCP |
| DLMS | Available | Smart grid meters · Telegram structure for Iskraemeco AM550 |
| DLMS push | Available | Meters that push data cyclically via the customer interface · Telegram structure for Landis+Gyr E350/E450 |
| M‑Bus (EN 13757‑2) | Available | Meters with M‑Bus interface · P1 Ultra Plus / Pro with energy meter |
| CAN | Available | Via the Controller Industrial · No article yet |
| eBus | Coming soon | No article yet |
Network, cloud & integration protocols
| Protocol | Status | Typical use & related article |
|---|---|---|
| OCPP 1.6 | Available | EV charging stations · Connect an EV charging station over OCPP 1.6 |
| OCPP 2.0.1 | Coming soon | No article yet |
| REST API | Available | Devices with an HTTP interface · Example: sonnenBatterie (REST API) |
| MQTT | Available | Integration with brokers and third‑party systems · Reduxi Controller MQTT API · Example: connect to an MQTT broker |
| EEBus | Available | EEBus‑compatible heat pumps and wallboxes · Add EEBUS compatible device |
Grid & utility protocols
| Protocol | Status | Typical use & related article |
|---|---|---|
| IEC 60870‑5‑104 (IEC‑104) | Available | Telecontrol communication with grid operators and plant control systems · No article yet |
| IEEE 2030.5 | Coming soon | No article yet |
5 Reduxi Converters
Reduxi Converters translate additional interfaces to RS485, so devices that don't speak one of the controller's native interfaces can still be integrated.
| Conversion | Status | Typical use & related article |
|---|---|---|
| M‑Bus (EN 13757‑2) → RS485 | Available | Meters with M‑Bus interface · Release notes – Reduxi Converter and Gateway |
| TTL → RS485 | Available | Smart meter customer interfaces (e.g. P1 port) · Reduxi Converter for Iskraemeco AM550 · P1 WiFi / Ultra in the Reduxi Configurator |
| EMS‑Bus → RS485 | Available | Heating systems with EMS‑Bus · No article yet |
| eBus → RS485 | Coming soon | No article yet |
→ Summary
- Reduxi Controller / DIN: 2× Ethernet, Wi‑Fi, 1× RS485; LTE on the PRO version.
- Controller Industrial: 2× Ethernet, Wi‑Fi, LTE, 2× RS485, 6× digital inputs, 4× relays, M‑Bus master/slave and CAN.
- P1 Ultra Plus / Pro: P1/HAN/I1, M‑Bus and RS485 towards the meter, Wi‑Fi towards Controller or Cloud; the Pro adds LTE.
- Most common device protocols: Modbus RTU/TCP, DLMS/DLMS push, M‑Bus, OCPP 1.6, REST API, MQTT and EEBus.
- Grid integration: IEC‑104 is supported; IEEE 2030.5 is coming soon. CAN is available via the Controller Industrial.
- Extending the system: the Reduxi Gateway adds 1× RS485, 2× relay outputs and 3× current‑transformer inputs.
- More protocols: Reduxi Converters add M‑Bus, TTL and EMS‑Bus (eBus coming soon) via RS485.
→ Common issues
| Issue | What to do |
|---|---|
| My device's protocol or model isn't listed | Check the List of supported devices first. If it's still missing, see Can we add a device to the list of supported devices? |
| Modbus TCP / network device can't be reached | Make sure the device is in the same network and check its IP address · Test if an ethernet device is reachable · Find an automatically assigned IP address (DHCP) |
| No data from an RS485 device | Check A/B polarity, cable type and bus termination · Wiring, cable types and connection diagram |
| Need a "coming soon" protocol for a project | Contact Reduxi Support with your project details so we can check the current roadmap status. |