# A recommended RS232 (USB will be great) GSM Module

**URL:** <https://discourse.nodered.org/t/a-recommended-rs232-usb-will-be-great-gsm-module/77796>\
**Category:** Hardware\
**Created:** [21 April 2023 14:56 UTC](https://discourse.nodered.org/t/a-recommended-rs232-usb-will-be-great-gsm-module/77796 "2023-04-21T14:56:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![marcus-j-davies](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/marcus-j-davies/32/103435_2.png) [@marcus-j-davies](https://discourse.nodered.org/u/marcus-j-davies)\
**Post date:** [21 April 2023 14:56 UTC](https://discourse.nodered.org/t/a-recommended-rs232-usb-will-be-great-gsm-module/77796/1 "2023-04-21T14:56:21Z")

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Uhh Hi!

I am currently involved in a project that aims to achieve the following.

- Automated divert changes according to a schedule  
(i.e Joe Bloggs is now on call, so divert calls to Joe Bloggs - and let Joe know via an SMS)

- Send SMS to whoever is currenlty on-call to advise of any detected system outage

- Ability to receive an SMS - that will trigger manual divert changes, or to trigger other things in Node RED etc etc

Most of this I know how todo with Serial AT Commands.

BUT!  
What I would like is some input into any device that some folk might recommended?

Here is some info that I am working with.

- UK EE Network (1800MHz, 2100MHz, 800MHz) \<- I believe

- 2G is due to end in the UK around 2033 - so no immediate danger of losing SMS functions, for devices that don't have 4G/LTE support - BUT, it will still be nice (as long as its supports the Serial AT command set)

- The number is widley known in our business - and its sim is currently placed in a smart phone - where we manage diverts manually 🤮 - but obviously it cant test our systems (Node RED will do that) - hence the need for Serial AT to drive comms.

- I can use a serial USB adapter if needs be, but still needs to be a wired device, and not a hat of some kind

Go! (and thanks) 😃

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [20 June 2023 14:57 UTC](https://discourse.nodered.org/t/a-recommended-rs232-usb-will-be-great-gsm-module/77796/2 "2023-06-20T14:57:01Z")

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