Hi,

 

Currently, 61 devices are connected, mostly on 2.4GHz.

 

All smart home devices are connected via the IoT network.
The firmware version on the Deco XE75 units is **1.3.0 Build 20250722 Rel. 38703**.

 

 

Network Layout:

                                   +--------------------------+
                       | TP-Link Deco main XE75   |
                       | (Access Point)           |
                       +--------------------------+
                                  ⇅
                       +--------------------------+
                       | TP-Link Deco satellite    |
                       | XE75 (Access Point)       |
                       +--------------------------+
                                  ⇅
                       +--------------------------+
                       | TP-Link Deco satellite    |
                       | XE75 (Access Point)       |
                       +--------------------------+
                                  ⇅
                         +---------------------+
                         | EdgeSwitch 24 Lite  |
                         +---------------------+
                                  ⇅
                         +---------------------+
                         | EdgeRouter X        |
                         | (DNS + DHCP)        |
                         +---------------------+
                         /                     \
                        /                       \
         +---------------------+       +------------------+
         | Internet Router     |       | Wi-Fi Devices     |
         | Fiber Box           |       |                   |
         +---------------------+       +------------------+
 

 

Results of my tests

The ping tests show an interesting mix of low and high latencies.
In particular, the ping times for **10.1.1.93** (a Shelly smart home device) fluctuate significantly, indicating instability in the network.

 

Below is a detailed analysis of the results:

 

1. Ping to EdgeRouter X (very stable connection)

* **Latency:** Average 0.26 ms with minimal variation.
* **Conclusion:** The connection to this IP address (most likely a directly connected device) is very stable and shows no irregularities.

 

2. Ping to TP-Link Deco satellite XE75 (slight fluctuations)

* **Latency:** Average 0.57 ms, with spikes up to 1.27 ms.
* **Conclusion:** These connections are also very stable. Minor latency variation is normal, especially for non-critical devices.

 

3. Ping to TP-Link Deco satellite XE75 (larger fluctuations)

* **Latency:** Average 3.30 ms, with peaks up to 6.30 ms.
* **Conclusion:** The latency is still acceptable but shows noticeable fluctuations, which could indicate instability in the Wi-Fi or between the mesh units.

 

4. Ping to TP-Link Deco satellite XE75 (greater fluctuations)

* **Latency:** Average 4.35 ms, with a maximum of 8.39 ms.
* **Conclusion:** The connection remains relatively stable, but the higher latency and variations suggest possible mesh link issues or wireless interference.

 

5. Ping to 8.8.8.8 (Google DNS)

* **Latency:** 16.6 ms up to 190 ms.
* **Conclusion:** The high latency peaks (up to 190 ms) could indicate interference on the Internet backhaul, routing inefficiencies, or ISP congestion.
  Such values are unusual and may be caused by temporary network load or provider issues.

 

6. Ping to 1.1.1.1 (Cloudflare DNS)

* **Latency:** Very stable, average 15.9 ms.
* **Conclusion:** This connection is stable and consistently low-latency, suggesting no issues with external DNS servers.

 

7. Ping to de.pool.ntp.org

* **Latency:** Average 23.96 ms.
* **Conclusion:** The latency is acceptable, indicating that communication with public NTP time servers works properly.

 

8. Ping to speedtest.net

* **Latency:** Very low, between 15.0 ms and 20.4 ms.
* **Conclusion:** This connection is also stable and shows no major problems with Internet access or throughput.

 

9. Ping to 10.1.1.93 (Smart Home Shelly device on 2.4GHz IoT)

* **Latency:** Highly variable between 5.66 ms and 136 ms.

  * **Average:** 36.49 ms
  * **Maximum:** 135.89 ms
* **Conclusion:** The strong fluctuations indicate instability between the Shelly device and the network.
  The sudden high latency spikes (up to 136 ms) suggest mesh issues or wireless interference, possibly due to congestion or overlapping channels.
  This behavior affects **all 2.4GHz IoT devices**.

 

Summary

 

* External connections are **very good** and show **no issues**.

* The **ping fluctuations and high latency** observed with the Shelly device (10.1.1.93) indicate **instability in the Wi-Fi link**, likely caused by:

  * Mesh synchronization issues
  * Overloaded wireless channels
  * General network congestion

 

 

Final Thoughts

I’m beginning to wonder whether the **TP-Link Deco XE75** was the right choice (it should theoretically support up to 200 devices), or whether the issue lies with the **firmware** or current **configuration**.

 

Subjectively, I didn’t experience these problems with the previous firmware version.

 

Any assistance or insights would be greatly appreciated. 🙏