How to Determine the Frequency Band of a Heltec V3 LoRa Board?

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How to Determine the Frequency Band of a Heltec V3 LoRa Board?

LoRa development boards comes in three different frequency bands--915 MHz, 868 MHz, 433 MHz--for different regions. See "LoRa Communication Frequency Bands" for more details. But some development boards, such as the Heltec V3 LoRa doesn't provide clear indication of the band. I will demonstrate how to determine the frequency band with the V3.1 board (see photo below).

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Duke
Wed, 25 Sep 2024 08:42:44 -0700

If you look at the bottom of this board, you'll see two resistors--LF and HF--mount points located above the Heltec Automation Brand (see photo below).

For 915 MHz, a 0-ohm resistor will be installed in the HF position. HF probably stands for high frequency.

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Bottom.jpg

Duke
Wed, 25 Sep 2024 08:47:21 -0700

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