An interesting Arduino project has been created by Nathaniel Nifong, ... DIY Ceiling Mounted Cable Robot Arduino Project. 10:59 am July 31, 2018 By Julian Horsey.

The acoustic coupler would do the job of converting serial data to audio and reconstituting it after its trip through the phone lines. Modems advanced, but have mostly given way to DSL, Cable ...

Using an IoT SIM that works on cellular networks in over 100 countries, the Electron's basic data plan starts at $2.99 per month for 1 megabyte of data and 99 cents for each additional megabyte.