I can't get SDS1000X-E WiFi to work with a fixed IP address - Page 1
Forum section: electronics / testgear

author: graybeard
author_rank: Frequent Contributor
timestamp: April 17, 2025, 05:43:00 am
content: I like to keep my test equipment on fixed IP address on my local network. I have several pieces of Siglent gear, and they all work great with fixed IP addresses when hardwired.I recently noticed that the latest firmware (V6.1.37R17) for my SDS1202X-E included the WiFi and logic probe options.So I upgraded the firmware in my scope and bought a TP-Link TL-WN725N USB WiFi adapter and plugged it into the rear USB port. When I tried to use it with a fixed IP address it refused to even connect.I switched DHCP and it worked fine.I then switched it back to a fixed IP address, and it would now say it was connected, but the link would not work.I can only make it work in DHCP mode.Have you been able to get the WiFi link to work with a fixed IP address?

author: tautech
author_rank: Super Contributor
timestamp: April 17, 2025, 06:44:37 am
content: Chris, do you have the TL-WN725N configured in Bridge mode ?

author: Kean
author_rank: Unknown
timestamp: April 17, 2025, 07:43:29 am
content: A good solution is to enable an IP address reservation on your DHCP server (i.e. router) against the MAC address of the WiFi adapter.Using IP reservations has the advantage of all/most of your IP addresses being recorded in one spot, and also easily maintained there.Another advantage is you can use the same SSID & WiFi passphrase at multiple locations (e.g. office and home, or office and hotspot) so you can take the device with you even if IP address ranges are different.The big disadvantage is that all hell breaks loose if your router dies or gets reset.

author: TomKatt
author_rank: Frequent Contributor
timestamp: April 17, 2025, 10:56:34 am
content: Quote from: Kean on April 17, 2025, 07:43:29 amCame here to say this - reservations are typically preferrable to hard set static IP's.Edit - reservations are particularly helpful when equipment may not have the ability to retain settings when power is lost. I'm not sure if the SDS1000X-E falls into this category, but seeing how it doesn't remember time I could see how it might not remember a static IP setting as well.

author: graybeard
author_rank: Frequent Contributor
timestamp: April 19, 2025, 06:38:03 am
content: Quote from: tautech on April 17, 2025, 06:44:37 amThere is no configuration for it. It is just a USB WiFi dongle.My ASUS RT-AX92U router works with both DHCP and fixed IP addresses.There are limited configuration choices on the Siglent scope. The WiFi screen will display available SSIDs and allow you to choose one. You then enter the password. I did this in fixed IP mode and it was rejected. I went to DHCP mode and it connected. The DHCP only changed the IP address once it was connected. My gateway and netmask were unchanged.I put it back in fixed IP mode and the connected symbol appeared in the lower right corner, but it would not talk on the network. I changed the IP to a range I have for fixed IPs and it behaved the same way. It shows the wifi connected symbol but will not communicate. When I put it back in DHCP mode everything works.I can use it in DHCP mode, but I will have to see what IP it was assigned every time I want to communicate with it.It would be nice to have a WiFi option on all of my gear to eliminate the network wiring.

author: tautech
author_rank: Super Contributor
timestamp: April 19, 2025, 06:58:29 am
content: Quote from: graybeard on April 19, 2025, 06:38:03 amSorry got my wires crossed.QuoteAt this point you should disable DHCP and the IP address its found and connected to will be saved....that's how I always do the USB dongle connection. Reconnects without issue.QuoteIf you don't have cabling anywhere near the bench but WiFi access I would recommend TP-Link TL-WR802N N300 WiFi 4 Nano Router in Bridge mode used in conjunction with any switch of your choice or buy one for each instrument.Totally invisible to your network once configured in Bridge mode.

author: graybeard
author_rank: Frequent Contributor
timestamp: April 19, 2025, 07:13:09 am
content: Quote from: tautech on April 19, 2025, 06:58:29 amI have 1GBs 5 port switch on my bench now. That is how I connect my test gear together and to my network. It is connected a ASUS RT-AX92U router which is an RF slave to my base RT-AX92U router.If I need more ports I have a D-Link DGS-1012D 24 port 1Gbps switch and can substitute for the 5 port switch.

author: tautech
author_rank: Super Contributor
timestamp: April 19, 2025, 07:31:10 am
content: Yeah a TL-WN725N USB dongle is a simple solution when the instrument OS can support it.Siglent made an error some years back disclosing the model of their branded WN725N USB dongle on all their websites and pricelists so everyone went to ePay for such and sourced then for less than Siglent offered them.Now when we ask for WiFi to at least be made available in SDS800X HD models they claim USB dongle sales were so low they won't add it.....I have 1 professional customer in particular that has mainlined on a good few SDS1104X-E just for their WiFi connectivity convenience where they can walk a scope to any of their several test benches doing wireless power transfer development. Last I was there they were at 20kW over 200mm.They like the 10" monitors in other models too but curse there is no convenient WiFi connectivity available for them.

author: graybeard
author_rank: Frequent Contributor
timestamp: April 19, 2025, 07:31:35 am
content: Quote from: tautech on April 19, 2025, 06:58:29 amI have already tried that. It did not work. It WiFi connects, but the scope will not communicate.I changed the IP address to a range assigned to fixed IPs. The WiFi connects, but the scope will not communicate.

author: graybeard
author_rank: Frequent Contributor
timestamp: April 19, 2025, 07:33:13 am
content: Quote from: tautech on April 19, 2025, 07:31:10 amI would like to have WiFi as an option on all of my instruments.

author: tautech
author_rank: Super Contributor
timestamp: April 19, 2025, 07:34:20 am
content: Quote from: graybeard on April 19, 2025, 07:31:35 amOkay, let's do a Facetime and walk through this step by step.Ping me when it suits....

author: Sorama
author_rank: Frequent Contributor
timestamp: April 19, 2025, 07:54:03 am
content: Why not make reservation in your dhcp scope based on the mac address?That way you will always have the same ip address and still use dhcp.