> 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/faq/overview.md).

# Overview

> Browse by topic below, or use the search bar to find your question directly.

### **Selection & Specs**

> Help users understand hardware capabilities and version differences before purchasing or upon first receiving the product.

<table><thead><tr><th width="166">Category</th><th width="600">Question</th></tr></thead><tbody><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical.md#what-communication-protocols-do-your-devices-support-all-products">Selection &amp; Specs</a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical.md#what-is-the-maximum-wire-diameter-for-the-spm01-and-spm02-spm01-spm02-products">Selection &amp; Specs</a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical.md#can-i-use-third-party-cts-with-the-sdm-series-sdm-products">Selection &amp; Specs</a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical.md#what-apps-and-gateways-hubs-do-your-products-support-all-products">Selection &amp; Specs</a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical.md#which-circuit-breakers-are-compatible-with-the-spm01-02-energy-sensors-spm-products">Selection &amp; Specs</a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical.md#can-the-spm-sdm-monitor-direct-current-dc-spm-sdm-products">Selection &amp; Specs</a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical.md#can-the-spm-meters-be-flashed-with-custom-firmware-spm-products">Selection &amp; Specs</a></td></tr></tbody></table>

***

### **Use Cases / Applications**

> Help users determine whether the products are suitable for a specific application scenario, and understand how to configure them for that use case.

<table><thead><tr><th width="166">Category</th><th width="600">Question</th></tr></thead><tbody><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical-1.md#do-spm-and-sdm-energy-sensors-work-with-split-phase-systems-in-usa-and-canada-120v-240v-spm-sdm-prod">Use Cases / Applications</a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical-1.md#does-the-spm02-flex-support-measurement-of-three-single-phase-circuits-spm02">Use Cases / Applications</a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical-1.md#does-sdm01-support-solar-export-limiting-zero-export-sdm01">Use Cases / Applications</a></td></tr></tbody></table>

### **Installation & Wiring**

> Answer "can I?" and "how do I wire it?" questions during physical installation (not error troubleshooting).

### **Connectivity & Integration**

> Answer questions about App, gateway, and third-party platform integration.

<table><thead><tr><th width="166">Category</th><th width="600">Question</th></tr></thead><tbody><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical-3.md#can-spm-and-sdm-energy-sensors-be-connected-to-home-assistant-spm-sdm-products">Connectivity &amp; Integration</a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical-3.md#what-happens-to-my-energy-data-if-the-network-connection-of-spm-sdm-is-lost-spm-sdm-products">Connectivity &amp; Integration</a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical-3.md#how-do-i-set-up-wi-fi-for-the-open-wi-fi-versions-all-products">Connectivity &amp; Integration</a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical-3.md#can-i-flash-standard-zigbee-firmware-onto-a-tuya-zigbee-device">Connectivity &amp; Integration</a></td></tr></tbody></table>

### **Data & Measurement**

> Explain where the data displayed in the App comes from, how often it refreshes, and where it is stored.

<table><thead><tr><th width="166">Category</th><th width="600">Question</th></tr></thead><tbody><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical-4.md#what-accuracy-standard-do-your-meters-follow-spm-sdm-products">Data &amp; Measurement </a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical-4.md#why-does-the-spm-sdm-show-lower-or-different-energy-consumption-compared-to-another-meter">Data &amp; Measurement </a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical-4.md#how-to-download-the-historical-data-measured-by-spm-sdm-meters-tuya-version">Data &amp; Measurement </a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/pages/sNoHoqecjxGLxcy94xcc#tuya-davidia-vs.-basic-version-whats-the-difference">/pages/sNoHoqecjxGLxcy94xcc#tuya-davidia-vs.-basic-version-whats-the-difference</a></td></tr><tr><td>Quick Answer</td><td><a data-mention href="/faq/electrical-4.md#does-spm-sdm-support-bi-directional-energy-measurement-spm-sdm-products">Data &amp; Measurement </a></td></tr><tr><td>Detailed Guide</td><td><a data-mention href="/faq/electrical-4/how-to-reset-tuya-smart-switches-and-smart-meters.md">How to Reset Tuya Smart Switches and Smart Meters</a></td></tr></tbody></table>

### **Electrical Concepts**

> Clarify common physical phenomena that are easily misunderstood, presenting them as educational knowledge points.

### Still have a question?

* 📧 Contact our support team: **<support@bituo-technik.com>**
* 🔧 Experiencing a device issue? → Go to [Troubleshooting](/troubleshooting/overview.md)