> For the complete documentation index, see [llms.txt](https://docs.bituo-technik.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bituo-technik.com/device-api.md).

# Device API

- [SPM/SDM Zigbee Cluster Reference](https://docs.bituo-technik.com/device-api/spm-sdm-zigbee-cluster-reference.md): This document details the device access standards, data models (Clusters/Attributes), and interaction commands for our Zigbee Smart Meter series (Single-Phase, Split-Phase, and Three-Phase).
- [SDM01 Modbus RTU Map](https://docs.bituo-technik.com/device-api/sdm01-modbus-rtu-map.md)
- [SPM/SDM Open Wi-Fi API Overview](https://docs.bituo-technik.com/device-api/spm-sdm-open-wi-fi-api-overview.md)
- [MQTT API Reference](https://docs.bituo-technik.com/device-api/spm-sdm-open-wi-fi-api-overview/mqtt-api-reference.md)
- [mDNS Discovery](https://docs.bituo-technik.com/device-api/spm-sdm-open-wi-fi-api-overview/mdns-discovery.md)
- [Modbus TCP Map - ESP32-8685](https://docs.bituo-technik.com/device-api/spm-sdm-open-wi-fi-api-overview/modbus-tcp-map-esp32-8685.md)
- [BLE Basic API](https://docs.bituo-technik.com/device-api/spm-sdm-open-wi-fi-api-overview/ble-basic-api.md)
- [BLE Secured API](https://docs.bituo-technik.com/device-api/spm-sdm-open-wi-fi-api-overview/ble-secured-api.md)