RN2903 with US902-928

Countries Frequency Plan
1

Hi all

I try to make the RN2903 work with the US902-928 frequency band.

Am I right that the RN2903 supports only the frequencies 902.30 to 903.58 and 915.00 to 915.96.

The default frequency table in http://ww1.microchip.com/downloads/en/DeviceDoc/RN2903%20LoRa%20Technology%20Module%20Command%20Reference%20User%20Guide-40001811B.pdf on page 36 seems to suggest that.
The frequency also cannot be chosen freely in the RN2903.

The US902-928 frequency plan on TTN uses 903.9 through 904.6.

Is it even possible to use the RN2903 on the TTN network? It seems to be not the case, or am I missing something?

Thank you for your help.
Adrian

2

That would be surprising as the TTN Kickstarter hardware for the USA was build using the RN2903. May-be you could take a look at the sources for the TTN node (available at GitHub) to check how things can be done?

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3

It should be 200k uplink channel spacing for 125k (DR0-DR3). The guide has 20k listed, this is a typo.
The 500k (DR4) channels have 1.6 MHz spacing

The document specifically lists the range as 902300000 to 914900000 in Hz on that same page.

These match the specification of US902-928.
https://lora-alliance.org/resource-hub/lorawanr-regional-parameters-v103reva

4

Thank you very much for your quick help.

Yeah the typo did confuse me :slight_smile:
I have it all working now (the github repo is also quite useful, thanks).

The australia guide has the same typo by the way.