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The SparkFun 1-Channel LoRa Gateway is a powerful 3-network capable device thanks to an onboard ESP32 WROOM module and an RFM95W LoRa modem. The RFM95W handles the 868/915MHz band while the ESP32 takes care of Bluetooth and WiFi capabilities. One of the ideal uses is to convert LoRa radio messages into data packets that you can access via the web. It’s a perfect, low-cost tool for monitoring a dozen-or-so LoRa devices and relaying their messages up to the cloud.
The Sparkfun hookup guide describes how to program it in the Arduino IDE, how to create a single channel LoRa gateway, and finally how to register your device on The Things Network as 'development' router.
The RFM95 can be set to use 915 (US) or 868 (EU) in the Arduino code.
To use the 868 MHz radio on the gateway you will need an antenna - for which you have two choices. You may cut a length of solid-core wire to 86 mm for a through-hole antenna connection with strain relief or you can use a 868MHz antenna with a U.FL connector for higher performance.
More information is available on the website of Sparkfun.