Used with old android phone with second SIM card and you can send it from your quota.
- Install SMS Gateway Ultimate from google play
- Setup server on android phone (username,password,port,protocol,port)
- Start the server on android phone and press info where you will get local ip
- Phone and raspberry pi must be on the same network or correct routes must be used or router forwarding must be applied
- Change variables to yours specifications in function SMS parameters
- In httprequest node enter username and password
- Modify inject field to respond to your need