# Connecting RYLR993 sensor to TTN

**URL:** <https://www.thethingsnetwork.org/forum/t/connecting-rylr993-sensor-to-ttn/68102>\
**Category:** Generic Node\
**Tags:** end-devices\
**Created:** [May 31, 2024, 11:17am UTC](https://www.thethingsnetwork.org/forum/t/connecting-rylr993-sensor-to-ttn/68102 "2024-05-31T11:17:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![croyant](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/croyant/32/44896_2.png) [@croyant](https://www.thethingsnetwork.org/forum/u/croyant)\
**Post date:** [May 31, 2024, 11:17am UTC](https://www.thethingsnetwork.org/forum/t/connecting-rylr993-sensor-to-ttn/68102/1 "2024-05-31T11:17:05Z")

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Hello everyone,

I’m working on a project using the RYLR993 LoRa module, and I’m trying to connect it to The Things Network (TTN). I’ve configured the device using the provided AT commands, but I keep encountering a “MIC mismatch” error when trying to join the network. Has anyone here successfully connected the RYLR993 module to TTN? If so, could you share the steps you followed or any tips for troubleshooting this issue?

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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:** [June 1, 2024, 8:35am UTC](https://www.thethingsnetwork.org/forum/t/connecting-rylr993-sensor-to-ttn/68102/2 "2024-06-01T08:35:28Z")

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“MIC mismatch” comes up multiple times on forum search so there’s plenty of detail to be read but TL;DR your AppKey is likely mismatched with the console - beware of B’s and 8’s looking the same.