# Create a mapping node with t-beam step by step

**URL:** <https://www.thethingsnetwork.org/forum/t/create-a-mapping-node-with-t-beam-step-by-step/30453>\
**Category:** Uncategorized\
**Created:** [October 3, 2019, 10:53am UTC](https://www.thethingsnetwork.org/forum/t/create-a-mapping-node-with-t-beam-step-by-step/30453 "2019-10-03T10:53:36Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Linar](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/linar/32/35697_2.png) [@Linar](https://www.thethingsnetwork.org/forum/u/Linar)\
**Post date:** [October 19, 2019, 6:01am UTC](https://www.thethingsnetwork.org/forum/t/create-a-mapping-node-with-t-beam-step-by-step/30453/5 "2019-10-19T06:01:37Z")

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It was [told before](https://www.thethingsnetwork.org/forum/t/ttgo-t-beam/15297/60) that SoftRF firmware has built-in ABP TTN node (inactive by default).  
Users who have enough skills to build firmware from source code can easily:

1. enable the node’s code [here](https://github.com/lyusupov/SoftRF/blob/master/software/firmware/source/SoftRF/SoftRF.h#L162)
2. enter their own TTN keys [there](https://github.com/lyusupov/SoftRF/blob/master/software/firmware/source/SoftRF/TTNHelper.cpp#L29)
3. then build the firmware while using [these instructions](https://github.com/lyusupov/SoftRF/tree/master/software/firmware/source#esp32)

Reference onto JS decoder for TTN console is [there](https://www.thethingsnetwork.org/forum/t/big-esp32-sx127x-topic-part-2/11973/551)

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