acassis opened a new pull request, #17763:
URL: https://github.com/apache/nuttx/pull/17763
## Summary
The current SX127x has some issues when used for long time communication,
although the chip has a resource called AFC (Automatic Frequency Correction) it
is not enough to fix frequency drift.
This PR also adds option to use different bitrates.
## Impact
This PR will make SX127x more stable for long time communication.
## Testing
Board 1:
```
NuttShell (NSH) NuttX-12.12.0
nsh> sx127x -m 1 -t
Start sx127x_demo
FSK modulation
Set frequency to 868000000
Set power to 14
```
Board 2:
```
nsh> sx127x -m 1
Start sx127x_demo
FSK modulation
Set frequency to 868000000
Set power to 14
Waiting for data
Received:
SNR = 0
RSSI = -66
len = 5
0x00 0x01 0x02 0x03 0x04
wait 5 sec ...
```
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