{"id":9104,"date":"2026-04-29T20:51:11","date_gmt":"2026-04-29T20:51:11","guid":{"rendered":"https:\/\/lora.vsb.cz\/?page_id=9104"},"modified":"2026-05-07T06:07:20","modified_gmt":"2026-05-07T06:07:20","slug":"2-4ghz-lorawan","status":"publish","type":"page","link":"https:\/\/lora.vsb.cz\/index.php\/2-4ghz-lorawan\/","title":{"rendered":"2,4 GHz MikroTik wAP LR2"},"content":{"rendered":"

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TTN version:<\/strong><\/td>\nTTNv3 \/ TTS SANDBOX<\/span><\/strong><\/td>\n<\/tr>\n
Activation:<\/strong><\/td>\nABP<\/td>\n<\/tr>\n
Device Class:<\/strong><\/td>\nClass A<\/td>\n<\/tr>\n
Last revision:<\/strong><\/td>\nApril 30, 2026<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

This tutorial demonstrates how to build a complete LoRaWAN 2.4 GHz<\/strong> communication chain consisting of an end node (LilyGO T3 S3) and a gateway (MikroTik wAP LR2), and how to integrate it with The Things Stack Sandbox (TTSS)<\/strong>. Unlike standard sub-GHz LoRaWAN, the 2.4 GHz band is globally available without duty cycle restrictions, allowing the same hardware to be deployed worldwide.<\/p>\n

The end node uses the Semtech SX1280<\/strong> transceiver controlled by an ESP32-S3<\/strong> microcontroller, reads temperature and humidity from a DHT11 sensor, and transmits the values as LoRaWAN uplinks every 15 seconds. Because no public Arduino library supporting the LoRaWAN protocol on the SX1280 transceiver existed at the time of development, a custom LoRaWAN 1.0.2 stack (frame assembly, AES-128 payload encryption, MIC computation) was implemented as part of this project.
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Prepare<\/strong><\/span><\/h2>\n