# How to connect a TTGO T-Beam to a Sim900 shield

**URL:** <https://www.thethingsnetwork.org/forum/t/how-to-connect-a-ttgo-t-beam-to-a-sim900-shield/49429>\
**Category:** Uncategorized\
**Tags:** location\
**Created:** [July 4, 2021, 3:52pm UTC](https://www.thethingsnetwork.org/forum/t/how-to-connect-a-ttgo-t-beam-to-a-sim900-shield/49429 "2021-07-04T15:52:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![DaRookie19](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/darookie19/32/35697_2.png) [@DaRookie19](https://www.thethingsnetwork.org/forum/u/DaRookie19)\
**Post date:** [July 4, 2021, 3:52pm UTC](https://www.thethingsnetwork.org/forum/t/how-to-connect-a-ttgo-t-beam-to-a-sim900-shield/49429/1 "2021-07-04T15:52:27Z")

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Hi. I am trying to create a tracking system using a LilyGo TTGO T-Beam and a Sim900 shield. The TTGO has a GPS and I can successfully get the GPS co-ordinates. The Sim900 is being used for sending SMS messages, which I can also successfully do. Now, I’d like to connect the two.

1. Which pins on each device do I need to connect?
2. What code do I use to send the GPS co-ordinates from the TTGO to the Sim900?  
Any help with these questions is much appreciated!

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**Author:** ![bertrik](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/bertrik/32/35697_2.png) [@bertrik](https://www.thethingsnetwork.org/forum/u/bertrik)\
**Post date:** [July 4, 2021, 5:25pm UTC](https://www.thethingsnetwork.org/forum/t/how-to-connect-a-ttgo-t-beam-to-a-sim900-shield/49429/2 "2021-07-04T17:25:23Z")

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This forum is about TheThingsNetwork which uses LoRaWAN. I think a sim900 shield is a complete different wireless technology, so it’s very unlikely you will find here what you are looking for.

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**Author:** ![descartes](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/descartes/32/47220_2.png) [@descartes](https://www.thethingsnetwork.org/forum/u/descartes)\
**Post date:** [July 4, 2021, 6:49pm UTC](https://www.thethingsnetwork.org/forum/t/how-to-connect-a-ttgo-t-beam-to-a-sim900-shield/49429/3 "2021-07-04T18:49:28Z")

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> [@bertrik](#):
>
> I think a sim900 shield is a complete different wireless technology

Indeed - the wiring up of many things is in scope for this forum, but connecting SMS to a device would be very marginal as an application and there are many many resources on doing such things on the internet at large for you to review.