The Dual-mode NRF/CMT DTU module comes with pre-installed latest version of OpenDTU firmware. The DTU module is designed for easy management and optimization of the HM, HMS, and HMT series of the Hoymiles inverters simultaneously, except the inverters with a “W” in the model number. Up to ten inverters can be connected. Built-in NRF24L01+ AND CMT2300A IoT modules Display and adjustment of current inverter limits Switching inverter on and off Support for multiple inverters (up to 10 inverters) Supports MQTT with TLS encryption Integration with Home Assistant MQTT auto-discovery User-friendly web application with real-time data visualization Firmware updates via web interface Support for different time zones Multi-language web interface (English, German, French) Prometheus API extension (/api/prometheus/metrics) After connecting a power supply (5V-2A，€ 4,99) via a USB-A to USB-C cable(€ 2,99 ), the DTU is recognized as an access point (AP). After entering the IP address and password, the DTU can be set up. Instructions are provided. If you need help with the setup, please contact us via email or whatsapp. The 5V-2A power supply and the USB-A to USB-C cable are not included in the standard package to protect the environment, and they can be ordered as accessories. Compatible Inverters Models using NRF24L01+ module (included already in this product): Hoymiles HM-300-1T Hoymiles HM-350-1T Hoymiles HM-400-1T Hoymiles HM-600-2T Hoymiles HM-700-2T Hoymiles HM-800-2T Hoymiles HM-1000-4T Hoymiles HM-1200-4T Hoymiles HM-1500-4T Solenso SOL-H350 Solenso SOL-H400 Solenso SOL-H800 TSUN TSOL-M350 TSUN TSOL-M800 TSUN TSOL-M1600 Compatible Inverters Models using CMT2300A module (included already in this product): Hoymiles HMS-300-1T Hoymiles HMS-350-1T Hoymiles HMS-400-1T Hoymiles HMS-450-1T Hoymiles HMS-500-1T Hoymiles HMS-600-2T Hoymiles HMS-700-2T Hoymiles HMS-800-2T Hoymiles HMS-900-2T Hoymiles HMS-1000-2T Hoymiles HMS-1600-4T Hoymiles HMS-1800-4T Hoymiles HMS-2000-4T Hoymiles HMT-1600-4T Hoymiles HMT-1800-4T Hoymiles HMT-2000-4T Hoymiles HMT-1800-6T Hoymiles HMT-2250-6T Set up your device: Power on the DTU – Once connected to power, it will generate a WiFi network starting with "openDTU". Connect to the WiFi – Select the "openDTU" network and use the password: openDTU42. Log in – Open a browser and go to 192.168.4.1. Use the following credentials: Username: admin Password: openDTU42 Configure Home WiFi – In the settings, enter your home WiFi name and password. Find the Device IP – After setup, the OpenDTU screen will display the new IP address assigned by your router. Still have questions? We are happy to help! Please simply write to us via email or whatsapp. Download opendtu-generic.bin opendtu-esp32.json
