Please refer to the router setup section of this post.
If you have two phones, could you please test:
Turn on the hotspot of phone A, it will work as a 2.4GHz wifi router. Phone A is placed next to the product.
Phone B connects to the hotspot of phone A, and downloads the INKBIRD APP.
Phone B connects to the product as instructed by the app.
If the product can connect to phone B in this test, it means its WIFI function is working. Please recheck the router settings.
This can help us check whether it is a router setting problem, or a device setting problem.
I bought two TH3, I put new batteries in both and pressed the side button for 8 seconds… The light never appeared to begin pairing… Checked the batteries several time. no luck. Returning them and purchased TH3 from another reseller… is there a faulty batch?
May I know are you using non-rechargeable alkaline batteries?
If the indicator light is checked in a dark environment, will it not light up?
Please understand that in order to save power, the brightness of the indicator light of IBS-TH3 is relatively weak. Please do not view it in a brightly lit place, otherwise it may be unclear.
I have had the same experience, I carried out all the usual checks, 2.4ghz etc but still wouldn’t connect. I then tried in a friend’s house and it still wouldn’t connect to WiFi. I should have returned it via Amazon but I chucked it in the drawer because it has wasted too much of my time already. I will not buy any more Inkbird products.