Acting as a GSM module that can send and receive SMS ... when it was discovered that not only was the ESP8266 a cheap WiFi module, but it could also run custom programs on its own.

The ESP8266 WiFi module is the latest, made interesting because it pretty much doesn’t exist outside China. Why is it cool? It’s a WiFi module with an SOC, making it somewhat similar to TI ...

👍Support WIFI and GSM dual network(you can use GSM if there is no WIFI, The WIFI only can work with 2.4G, not work with 5G), Different alarm status: away arm, home arm, delay arm and timely arm ...

If you’ve been intrigued by what exactly is different between the WiFi, GSM (AT&T) and CDMA (Verizon) versions of the iPad 2, well iFixit has you covered yet again with some very nice comparisons of ...