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mcci-catena / arduino-lorawan

User-friendly library for using arduino-lmic with The Things Network and other LoRaWAN® networks
MIT License
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Requesting info about AS923 Japan support #148

Closed kevin192291 closed 3 years ago

kevin192291 commented 3 years ago

I have recently been looking into restrictions for LoRaWAN devices in Japan. I found the following requirements:

Transmission time restrictions are:
  (1) If carrier sensing (LBT) function is provided: TX ON < 4s and TX OFF > 50ms
or
  (2) If carrier sensing (LBT) function is not provided: TX ON < 0.1s and TX OFF > 0.1ms, total TX time < 3.6s/hr
- Max. Antenna gain < 3dBi
- Max. Conducted power < 0.25W
- Other condition: device contained in sealed casing

My question is if the Arduino-lorawan library handles this when setting the frequency plan in the config(ARDUINO_LMIC_CFG_NETWORK_TTN) to AS923 Japan, or if this is something that I would be required to handle myself?

Thank you very much for the info, and I am sorry if this question doesn't make sense. I am still trying to learn all of this.

-Kevin

terrillmoore commented 3 years ago

Hi, this is mostly handled by the LMIC. The LMIC implements LBT, so the restrictions are met. The "max antenna gain" is handled by your hardware design. Th max conducted power is handled by your hardware design; the LMIC attempts to tell the SX1276 what power to transmit at, but has no control over what the circuit actually does.

Since arduino-lorawan is really just a wrapper for arduino-lmic, you may want to open discussions there.

Best regards, --Terry

kevin192291 commented 3 years ago

Thank you very much for the extremely fast reply. This helps a lot.