![Giving the Raspberry Pi a Serial Modem Using the HUAWEI E3531 USB Dongle (+ Send SMS) : 6 Steps - Instructables Giving the Raspberry Pi a Serial Modem Using the HUAWEI E3531 USB Dongle (+ Send SMS) : 6 Steps - Instructables](https://content.instructables.com/FX0/BZRX/J98R6E5E/FX0BZRXJ98R6E5E.png?auto=webp&frame=1&fit=bounds&md=15212b6ec5bc965483074c6c0bb67f8d)
Giving the Raspberry Pi a Serial Modem Using the HUAWEI E3531 USB Dongle (+ Send SMS) : 6 Steps - Instructables
![for Raspberry Pi GSM/GPRS/GNSS Bluetooth HAT Module SMS GPS UART Based on SIM868 for Raspberry Pi 4B/3B/3B+/2B/Zero/Zero W Support Phone Call Speaker Global Position Transfer Data @XYGStudy for Raspberry Pi GSM/GPRS/GNSS Bluetooth HAT Module SMS GPS UART Based on SIM868 for Raspberry Pi 4B/3B/3B+/2B/Zero/Zero W Support Phone Call Speaker Global Position Transfer Data @XYGStudy](https://m.media-amazon.com/images/I/617oNgsRHHL._AC_UF894,1000_QL80_.jpg)
for Raspberry Pi GSM/GPRS/GNSS Bluetooth HAT Module SMS GPS UART Based on SIM868 for Raspberry Pi 4B/3B/3B+/2B/Zero/Zero W Support Phone Call Speaker Global Position Transfer Data @XYGStudy
![I built an SMS gateway API using a Pi now I can send notifications to my phone even if the internet goes out. Tutorial in the comments : r/homelab I built an SMS gateway API using a Pi now I can send notifications to my phone even if the internet goes out. Tutorial in the comments : r/homelab](https://i.redd.it/mng4smlj5q381.png)