> 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/troubleshooting/electrical-2/why-are-values-not-displayed-on-charts-in-the-smart-life-app.md).

# Why Are Values Not Displayed on Charts in the Smart Life App?

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**Applies to:** All Tuya Connectivity Products | **Scenario:** App & Cloud Issue | **Updated:** 2026-08-24
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If your real-time values (voltage, current, power) display correctly on the dashboard, but historical charts (hourly, daily, or monthly graphs) show no data or abnormal values, the issue usually stems from Tuya's chart calculation logic or incomplete device reset procedures.

Follow this troubleshooting guide to diagnose and fix the issue.

***

#### Cause 1: Normal Cloud Data Aggregation Delay

The Tuya Cloud platform processes real-time telemetry into historical chart intervals on a schedule, rather than instantly.

* **Hourly Charts:** Require at least **1–2 hours** of continuous online operation after initial pairing before the first bar renders.
* **Daily / Monthly Charts:** Require at least **24 hours** of continuous logging to aggregate interval metrics.

> **Action:** If you recently paired the device, keep it powered on and connected for at least 2 hours before evaluating the charts.

***

#### Cause 2: Incomplete Reset — Cleared Cloud Data, But Skipped MCU Flash

When unbinding or resetting a device via **Remove and Clear Data**, Tuya generates a new Virtual Device ID and wipes the historical cloud database. However, **this action does NOT clear the total accumulated energy stored in the meter's local MCU Flash memory.**

<figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2FI7PyiMeONndoVwgpPVuG%2Fimage.png?alt=media&amp;token=62429a92-112b-429c-bb89-1c4e2602e5c5" alt="" width="188"><figcaption></figcaption></figure>

**Why This Causes Chart Issues**

Tuya handles chart rendering differently based on device categories:

* **Smart Relays:** Periodically report incremental energy changes (e.g., every 15 minutes).
* **Smart Meters (SPM/SDM):** Report the **absolute total accumulated energy** (kWh). The Tuya Cloud calculates daily/monthly usage by taking the difference between two timestamps.

If you reset cloud data without clearing the MCU, the meter will upload its existing high accumulated value (e.g., 45,800 kWh) to the freshly reset cloud account, leading to massive display **spikes or broken chart** calculations.

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**How to Completely Zero Out the Meter:** To ensure clean chart generation after a reset, you must clear both cloud and hardware memory:

1. **Clear Cloud Data:** In the Smart Life App, tap the **Edit (Pen) icon** -> **Remove Device** -> **Remove and Clear data**.
2. **Clear MCU Flash Memory:** Go to device page in App -> **Settings** -> **Energy Management** -> **Zero Energy** -> **Confirm**.<br>
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***

#### Cause 3: Incomplete Reset — Cleared MCU "Zero Energy", But Skipped Cloud Data

Conversely, if you trigger **Zero Energy** in the app settings without clearing the historical cloud records, Tuya's monthly delta logic will break.

**Example Scenario**

* Suppose your meter accumulated **45,800 kWh** in the cloud history.
* You tap **Zero Energy** (MCU resets to 0 kWh), but keep the existing cloud device profile.
* As the meter starts counting up again (1 kWh, 2 kWh, etc.), Tuya's monthly algorithm compares new incoming values against the highest recorded historical peak (45,800 kWh).
* Since the new values do not exceed 45,800, the cloud calculates a zero or negative difference and **fails to render any bars in the Monthly view** (even if Daily views show active readings).

<figure><img src="https://68488808-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTmsWivaZjkubbVKrCezC%2Fuploads%2Foj5XcnezDUJ2DaOGp810%2Fimage.png?alt=media&amp;token=79f0c91b-8268-493f-a285-54086cf13881" alt="" width="548"><figcaption><p>Data appears in the daily view but is missing when switching to the monthly view.</p></figcaption></figure>

> **Solution:** Unbind the device using **Remove and Clear Data** in the Smart Life App, perform a **Zero Energy** reset, and re-add the device to reset both cloud baselines and local MCU registers simultaneously.

***

#### Additional Quick Checks

If the reset procedures above do not resolve the issue, check these environment settings:

* **Signal Strength & Offline Drops:** Ensure your Wi-Fi or Zigbee signal strength is sufficient (RSSI $\ge -70 \text{ dBm}$). Poor signal causes telemetry packet loss, leading to gaps in interval data.
* **App Time Zone:** Verify that your smartphone and Smart Life App profile are synced to your local time zone. Time zone mismatches can cause chart data to render outside the selected date ranges.

***

#### Still Need Help?

If you have verified all the steps above and your historical chart remains blank after 24 hours of operation, please contact our support team with:

* Device Model (e.g., `SPM01-D2TW`)
* Virtual ID (Found under *Device Settings* -> *Device Information*)
* A screenshot of your real-time dashboard and the empty chart page.