diff --git a/README.md b/README.md index a7d6b60..aa7ab1b 100644 --- a/README.md +++ b/README.md @@ -29,10 +29,31 @@ almost 2.7 km distance - with simple wire antennas, and a low hill in between. Compared to the [RFM69](https://github.com/gitdode/librfm) at +13 dBm, it does -make it a few hundred meters further - seems fair enough! +make it a few hundred meters further - seems fair enough! ![FieldTest4](https://github.com/user-attachments/assets/67f745c4-a47f-4cb1-a278-547a0b0e01e3) ### LoRa -ToWalk 😅 +With LoRa, reception was stable with about -125 dBm at almost 7 km distance +somewhat line of sight, with the following configuration (and as well just +simple wire antennas): + +- Carrier frequency: 868.6 MHz +- Output power: +17 dBm +- LNA highest gain, boost on, 150% LNA current +- Signal bandwidth: 62.5 kHz +- Error correction code rate: 4/5 +- Spreading factor: 9 +- Preamble length: 12 symbols +- Explicit header mode +- CRC on +- Low Data Rate Optimization + +So, LoRa seems to perform significantly better than FSK - as expected - but I'm +quite sure FSK can go further than 2.7 km under similar conditions. + +Anyway, these radio modules work very well with both modulation schemes! + +![Transmitter placement](https://github.com/user-attachments/assets/0579ce09-9a47-4a64-8224-680413c7764e) +