Hello everybody,
For a proof of concept, I attempted to validate the LoRa modulation by having two B-WL5M-SUBG1 boards exchange ping-pong messages. However, I couldn't manage to exchange data with these boards at a distance greater than 230m in an open field. I expected at least 1km of communication distance.
My radio configuration is the following:
Tx output power: 14dB
RF frequency: 868.0 MHz
Bandwidth: 125kHz
Spread factor: SF7
Coding rate: 4/5
I used the antennas coming with the development boards
Few questions:
- I have connected the B-WL5M-SUBG1 to a vector analyzer and measured a VSWR of 2.339 for the 868.00 MHz frequency. Should I change the C19, C20, and L1 components to better adapt the board for my frequency to reach the expected communication range?
- Are the provided antennas with the development board able to communicate a range greater than 250m?
- I have found the AN5528 evoquing range greater than 1km for S2-LP in 868MHz. Should I expect similar results with WL5 MCU?
