SMS and a recommended modem

Configuration
1

Can anyone here recommend a modem for this integration, https://www.home-assistant.io/integrations/sms/ , which works more or less plug & play with a raspberry pi 4?

2

I would go for a cheaper solution:

  1. install Home Assistant Core

  1. install ESPhome add-on
    https://www.esphome.io/index.html

  2. buy Sim800L with ESP32
    https://www.banggood.com/LILYGO-TTGO-T-Call-V1_3-ESP32-Wireless-Module-GPRS-Antenna-SIM-Card-SIM800L-Board-p-1527048.html?rmmds=search&cur_warehouse=CN

  3. use ESPhome Sim800L component
    https://www.esphome.io/components/sim800l.html

3

I plan to use this for notify me when there is a power failure. My raspberry pi with HA is already on a UPS, but my wifi is not (which is needed for esp32). If I go for this, I have to buy a UPS for my wifi and then I could just as well send notifications by internet instead of sms.

But thanks for your suggestion. I have a lot of esphome units already and it is a great system :slight_smile:

4

Hm, I see that lilygo ttgo t call could be run from a battery. Maybe I should take a serious look at this board.

5

yes, it has an onboard battery backup connection