Support for Australia 915-928

[tftelkamp]

Very similar to US902-928. These are differences only.

Frequency band: 915 Mhz to 928 Mhz

Upstream

Channels 0-63

• 125kHz
• 915.2 to 927.8 in steps of 200khz

Channels 64-71

• 500kHz
• 915.9 to 927.1 in steps of 1.6Mhz

Downstream

Channels 0-7

• 500kHz
• 923.3 to 927.5 insteps of 600kHz

RX1

Downstream channel for upstream freq1 @ 125kHz:

down_chan = ((freq1-(915.2))/0.2) %% 8

Downstream channel for upstream freq1 @ 500kHz:

down_chan = ((freq1-(915.9))/1.6)

Convert to downstream frequency:

down_freq = 923.3 + (down_chan * 0.6)

DR Upstream -> DR Downstream

0 SF10BW125 - 10 SF10BW500
1 SF9BW125 - 11 SF9BW500
2 SF8BW125 - 12 SF8BW500
3 SF7BW125 - 13 SF7BW500
4 SF8BW500 - 13 SF7BW500

For reference:

8 SF12BW500 - 8 SF12BW500
9 SF11BW500 - 9 SF11BW500
10 SF10BW500 - 10 SF10BW500
11 SF9BW500 - 11 SF9BW500
12 SF8BW500 - 12 SF8BW500
13 SF7BW500 -13 SF7BW500

For now, we can distinguish Australia from the US by the uplink frequency:

902-915: US
915-928: Australia

** Sub-band

Not relevant for back-end right now. We should not use sub-band 6,7,8 because the overlap with the downlink channels.

[htdvisser]

Implemented in feature/us-frequencies. It works, but still needs some (unit) testing before we can merge. We can field-test this on Staging.

[htdvisser]

@tftelkamp: Is the TXPower the same as US915?

[tftelkamp]

Just use the same TXpower as US915.

[htdvisser]

Support for the AU 915MHz frequencies has been implemented in the refactor branch. See #199 for more info.

[dub1504]

Question:

How does end device determine RX2 channel frequency and data rate in Australian 915-928 MHz range ?