# SIM900 and SIM800L GSM project

**URL:** https://discourse.nodered.org/t/sim900-and-sim800l-gsm-project/66900
**Category:** Share Your Projects
**Created:** [25 August 2022 12:04 UTC](https://discourse.nodered.org/t/sim900-and-sim800l-gsm-project/66900 "2022-08-25T12:04:48Z")
**Posts on this page:** 1
**Showing post:** 33

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### Author: ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)
#### Post date: [19 November 2022 16:29 UTC](https://discourse.nodered.org/t/sim900-and-sim800l-gsm-project/66900/33 "2022-11-19T16:29:32Z")

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The way I have done it before is to just compare the current position with the last sent and if greater than (say) 500m then send. If not don’t. ( or maybe then send if time diff is greater than say 5 mins).

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