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?
I would go for a cheaper solution:
- install Home Assistant Core
install ESPhome add-on
use ESPhome Sim800L component
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
Hm, I see that lilygo ttgo t call could be run from a battery. Maybe I should take a serious look at this board.
yes, it has an onboard battery backup connection