I have been working fine with the NodeMCU board connected to an arduino to upload telemetry data to ubidots for several weeks.
Today I started to have problems.
At first I thought that the board was failing or something.
I connected it to my computer to debug it, and I got this message from the esp8266 when it tries to upload data:
01:18:54.698 -> Sending data…
01:18:55.346 -> [ERROR] Could not verify the remote secure server certificate, please make sure that you are using a secure network
01:18:55.448 -> Ok
I Will appreciate any help you can give me with this.