Phones and devices#
The second alert layer, for everyone a smartphone app doesn’t reach. One press, or one missed call, and the whole village knows — the same alert, in the same group, as a tap in Telegram.
Why a phone number#
Telegram covers the people who already use it. A phone number covers everyone else, because a phone number is the one interface that every phone and every alarm device in Spain already speaks. Nothing to install, nothing to log into, nothing new to learn at four in the morning.
That gives us, for free:
- A door for people who aren’t on Telegram — a dumbphone, or a smartphone used only for calls. They cost nothing to add and there are more of them than anything else.
- A door for people who can’t work a phone at all — a pendant, a watch, a unit on the kitchen wall. No screen, one button.
- Alarms nobody has to raise. Fall detection fires with nobody pressing anything, which is the case this whole layer exists for.
- No lock-in to any manufacturer. Escudo publishes a requirement, not a product.
The interface, not the device#
Escudo doesn’t choose or supply hardware. Families buy their own. That means no village purchase, no committee deciding who is frail, and no list of the vulnerable — which this project refuses to keep anyway.
What Escudo publishes instead is one requirement, and anything that meets it can join:
It must be able to call or send an SMS to a stored number.
That’s the whole specification. Every domestic alarm product sold in Spain meets it, in every shape, and so does a fifteen-year-old Nokia.
Three doors#
| Door | Who it’s for | What it costs |
|---|---|---|
| Telegram | Anyone with a smartphone who uses it | Nothing |
| A registered phone | Has a phone, isn’t on Telegram — a dumbphone, or a smartphone used only for calls | Nothing |
| A registered device | Can’t work a phone in a crisis, or is unconscious | The family buys it |
The middle door is the one that changes the arithmetic. In a village like ours a lot of people own a phone and don’t use Telegram on it, and until now every one of them was invisible to Escudo. Registering the phone somebody already carries costs nothing — no purchase, no fitting, no visit from a technician — so this is the cheapest useful thing the village can do, and probably the one that reaches the most people.
Nothing downstream branches on which door an alarm came through. A call or a text from a registered number becomes an ordinary alert, with the same dedupe, the same false-alarm button, the same log.
In this section#
- Choosing one, with the person — what qualifies, what the shapes are good for, and why nobody is handed one.
- The Escudo number — how an alarm actually travels, hop by hop, and what this layer doesn’t solve.
- Setting it up in your village — the runbook: the number, the two webhooks, the device, the registration.
Getting a household onto it is also a protocol of its own.