Hello everyone,
I would like to configure a custom bandwidth of 150 kHz in ChirpStack. Could anyone please let me know which files need to be modified?
(Note: I am communicating via RF cables.)
You’d want to make a new (or edit an existing) regional file. Like region_us915_0.toml. Then add it to your enabled regions list in your Chirpstack.toml, change your MQTT topic prefix to your new region and that should be all.
With respect to answering exactly the question and the question only, probably, yes. But there is no single datarate in LoRaWAN that uses 150kHz… so you’d need to apply some serious sorcery to your devices, making them pretty much completely LoRaWAN-incompatible. I’d highly discourage OP from doing this.
I believe it’s down to the hardware. When we want to listen or transmit, we just write to the SX1276/SX1301’s registers and it does magic. In fact, it’s always been borderline black magic, as Semtech has been known to refuse providing documentation.
Actually, why this unusual number of 150kHz? If you intended to use wider channels, why not go with 250kHz? 250 kHz is commonly found as a bandwidth of a datarate in various regions (e.g. DR6 of EU868 and AS923).