I have exactly the same problem on several Lolin Wemos devices that had been working for 18 months; when I turn on serial debug, I get
…WiFi connected
IP address:
192.168.1.108
Sending data…
Trying to connect to industrial.api.ubidots.com , attempt number: 0
Attempt finished
Trying to connect to industrial.api.ubidots.com , attempt number: 1
Attempt finished
Trying to connect to industrial.api.ubidots.com , attempt number: 2
Attempt finished
Trying to connect to industrial.api.ubidots.com , attempt number: 3
Attempt finished
Trying to connect to industrial.api.ubidots.com , attempt number: 4
Attempt finished
[ERROR] Could not connect to the server.
I have a STEM account (I teach Electronics)- might that be the problem that the library defaults to Industrial?
Nothing has changed on my network, and Wifi connection works fine. all devices just stopped uploading (well below ingestion limit)
This got worse when I tried updating the Arduino IDE and my libraries, but I now can’t compile a sketch at all to upload to UBIDOTS- there are lots of outdated examples about.
Where to start? pls could someone link me to consistent ESP8266 standalone resources? I have tried both the libraries linked from UBIDOTS help pages, and another from GitHub- even the examples won’t compile!
Peter