едит: за SMS в LPWA мрежа ( NB / CAT-M ) пише, че зависи от оператора - повечето не го използват...

това трябва да е LTE CAT1 платката
https://www.aliexpress.com/item/1005003087104900.html

тва трябва да е LTE CAT4 (демек по-бърз интернет )
https://www.aliexpress.com/item/1005002002781221.html

LTE се различават по CAT-овете
CAT-M е LPWA ( Low Power Wide Area ) като NB ( NarrowBand ) - частен случай на GSM бла бла
CATx са нормални LTE ... X означава клас скорост ... накратко
https://www.cablefree.net/wirelesstechn ... finitions/

NB ( NarrowBand ) не е LTE - това е китайска версия за LPWA (бизнес модел, демек за GSM оператори), слагат LTE ( за реклама ) и е приспособен да работи в LTE мрежи - използва само протокола на LTE за логване ...
и не е LTE защото може да работи сам в различни обхвати и технологии ( за логване в бизнес мрежата )

а целта на LPWA е ... 10 секунди работи ... ден/седмица/месец спи

CAT1 ми е достатъчно като скорост а и по бавните са по тънки като цена.

спирам се на A7670X

SIMCom Cat.1 Module A7670X Creates a Smart Pet Tracker Solution
A pet locator solution which based on SIMCom’s Cat.1 module A7670X has been developed successfully, which provides precise positioning and keeps pet trackable anytime. Pet tracks can be transmitted to the background management system via the A7670X, allowing people to check the exact location of your pet on their computer or mobile phone. The A7670X supports up to 10 Mbps data transfer. It enables newer, quicker, and more precise pet tracking. Besides, it supports trace playback which allows you to easily find your pet’s secret haunt.
This smart pet tracker also can monitor Pet’s Amount of Exercise. Different pets need different amount of exercise. The tracker can accurately monitor the distance, time and calorie consumption during exercise considering the pet’s weight, shoulder height and other factors.
About A7670X
The A7670X is a Multi-Band LTE-FDD/LTE-TDD/GSM/GPRS/EDGE Cat.1 module solution with up to 10Mbps data transmission. It features great extensibility with a rich set of interfaces including UART, USB2.0, GPIO, and more. The package of A7670X module is compatible with SIM7070 series, enabling short time-to-market and reduces development cost for customers.


The A7670 series is the LTE Cat 1 module which supportswireless communication modes of LTE-TDD/LTE-FDD/GSM/GPRS/EDGE. It supports maximum 10Mbps downlinkrate and 5Mbps uplink rate.
The A7670 series adopts LGA form factor and iscompatible with SIM7000/SIM7070 series(NB/Cat Mmodules), and SIM800A/SIM800F(2G modules), whichenables smooth migration from 2G/NB/Cat M products toLTE Cat 1 products, and greatly facilitates morecompatible product design for the customer needs.
The A7670 series supports multiple built-in networkprotocols, supports drivers for main operation systems(USB driver for Windows, Linux and Android etc.) andsoftware function, AT commands are compatible withSIM7500/SIM7600 series modules. Meanwhile the A7670series integrates main industrial standard interfaces, withpowerful expansibility, including abundant interfaces suchas UART, USB, I2C, GPIO, which is suitable for main IOTapplications such as telematics, surveillance devices, POS,industrial routers, and remote diagnostics etc.

с тази платка ли или само модул
https://github.com/Xinyuan-LilyGO/T-A7670X

чипсет ASR1601 - това като SoC подържа камера и LCD, капацитивен тъч и хардуерен JPG и камара екстри
и е по-яко от ESP-то на платката лилиго