Your data (retention, export, deletion)
The data of your devices is yours. It is stored on infrastructure inside the European Union, and you can export it at any time at no cost.
What is stored
Section titled “What is stored”- The latest values and the state of each device.
- The history of the readings. The cloud keeps a value mainly when it is different from the previous value. That is why a stable freezer has fewer points on the chart than a fridge with frequent changes.
- The configuration: device names, settings, groups, rules and map positions.
If the connection is lost, many devices keep their readings and send them when the connection comes back.
How long we keep it
Section titled “How long we keep it”| Data | Retention |
|---|---|
| Reading history | 36 months |
| Daily and monthly totals | Can stay longer |
| Settings, names, rules, groups | No time limit |
If you need the data for a longer time, export it and keep a copy.
Export
Section titled “Export”Export has no cost and no limit.
- From the app, to PDF or CSV, for any period. See Measurement reports (PDF, CSV).
- From the API, to connect another system. See REST API and Download historical data.
- Live data through the WebSocket. See Live data (WebSocket).
Stop the recording
Section titled “Stop the recording”You can stop the history recording for one device. Turn on the Do not keep track of data setting in the device settings. See Device settings.
After this, the device shows live values, but it has no new history, charts or reports.
Deletion
Section titled “Deletion”- To delete the history of a device, send its serial number to contact@hamsystems.eu. See Contact support.
- To delete your account, see Account details and password. The account deletion does not delete the history of the devices. Ask for it separately.
Who sees your data
Section titled “Who sees your data”HAM Systems uses the data for:
- the service and its security,
- finding and correcting faults,
- product improvement and anonymous statistics.
HAM Systems does not give your data to third parties for their own purposes without your consent.
You can give access to other persons with sharing, guests, the API key or webhooks. To stop this access:
- Remove the share from the device. The change applies at once and is recorded in the device history. See Share devices.
- Make a new API key. The old key stops working. See Account details and password.
- End the guest links. See Guests and users.
With the Allow support access setting on the Account page, you let support open your account to help you.
Data controller and privacy policy
Section titled “Data controller and privacy policy”The data controller is Home Automation and More P.C., Karyotaki 7, Thessaloniki, Greece. For the partners that process data, see the privacy policy.
For questions, write to contact@hamsystems.eu. You can also make a complaint to the competent authority in your country, under Article 37 of Regulation (EU) 2023/2854 (the Data Act).
For the security of the platform, see Security.

