Tell us about yourself!
The To phone number is your cell phone number - this needs to be verified on your twilio account before first use. The From phone number is your free Twilio number, find it in your account. If you can't find it try googling Twilio Trial number. Good luck!
That makes more sense! You could definitely do that using this code. Use the default wifi example, and then add the thing speak default URL call. Or if you're looking for a simpler solution, explore using Temboo. Let me know if you run into any issues.
It would be hard to send a message outside of wifi because the Arduino needs wifi to send the message! You might want to look into a cellular shield or other options. However this code should work with the MKR1000, just replace the client library with the native Arduino wifi library. Good luck!
I believe Twilio wants your phone number in the standard 10 digit form, so +1, then your area code, then your phone number. Let me know if that doesn't work.
The from phone number is your Twilio ten digit number that you receive when you sign up for Twilio.
Have you tried to run some examples from the UIPEthernet library and do they work? If the ENC28J60 cannot connect to the internet that is your first problem. Good luck debugging!