Hi,

I've been using our T3510 since June. After a few niggles trying to set it up initially, it's been working really well. Yesterday, I unplugged it to move it to another room (we're in the process of buying 2 more units). Unfortunately, the sensor dropped off the network. Ping commands fail and web interface also fails to connect.

I've been attempting to recover the sensor all day with limited success. I have attempted a factory reset endless times and only managed to connect 3 times after a factory reset. Whenever I attempt to change the network settings, the sensor is lost again. Multiple Factory resets then fail.

So, here's where I am.

All firewalls are temporarily disabled.

Sensor is connected to a PC using a cross cable (I've also used a normal ethernet cable with no luck). All cables were borrowed from a working system.
PC network settings are: IP - 192.168.1.50, subnet - 255.255.255.0, gateway - 192.168.1.1

I've removed the front screen of the T3510, disconnected the power cable, made sure the jumper is closed (both pins connected), pressed the button inside the device whilst reconnecting the power supply. I keep the button pressed for 10 seconds before releasing. I would then expect to be able to ping the sensor using 192.168.1.213 but this fails. I've attempted to re-power the device after the reset but this doesn't help either. There is a small number 3 on the screen next to the measured temperature and humidity values. When I press the small internal button , a small number 4 is displayed under the 3. I don't know if those numbers are relevant.

I've also tried the factory reset with the jumper removed thinking that the instructions could be wrong but the screen shows "- - - -" when I do that. Ping fails again so I restart the device and ping still fails.

Tsensor software is even more useless. It never connects. The search facility never finds anything. I've used the button for "Help! My device wasn't found" by entering the MAC address (printed on the side of the sensor) and entered the default IP of 192.168.1.213. Tsensor reports that the request was sent to the device but it can never been seen. I've also tried other IP addresses of 192.168.1.X (making sure I don't use the one from my PC).

On the very few times a factory reset works (3 in a day after what feels like 1000s of attempts), I have attempted to use the original settings for our network. IP 172.16.15.210, subnet 255.255.0.0, Gateway and DNS 172.16.15.1. On a previous post, I was informed that the device will need to be re-powered again when changing subnets so I've made sure I do that. I then put my PC back into the network as a DHCP client and attach the sensor to the network using normal ethernet (non-crossed) cables. The sensor is then never seen again. My previous experiences of setting the sensor up as DHCP were painful so I'm reluctant to open up that old wound.

So, the PC is back to 192.168.1.50, cross cable from the PC to the sensor and I've attempted numerous Factory resets without luck.

I've used Wireshark to capture ARP packets and can see the following when I reconnect the ethernet cable to the device:

19    33.776043    HewlettP_93:9a:ca    Lantroni_af:ef:d2    ARP    42    Who has 192.168.1.213? Tell 192.168.1.50

Despite this promising result, I still cannot ping or use the web interface.

I've cleared the ARP table using both "arp -d" and "netsh interface ip delete arpcache" thinking I'd confused the PC. I've also rebooted the PC whilst crossing my fingers.

Serial number is 16964337. I'd love to report the firmware version but I cannot access the device.

Hoping for some help as I am ordering more units and I do like these devices (when they work)

Best regards

Daz