Guru
Joined: 05/03/2018
Location: NetherlandsPosts: 5992
| Posted: 12:02pm 18 Jun 2021 |
The transmitter and receiver bandwidth are fixed at 5kHz allowing 10kbps modulation.
Using lower datarates (2400baud) does not increase the signal to noise as long as the receive bandwidth is fixed at 5kHz. So Jim's proposal to use higher data rate and send the message more often, and compare best out of 3 or 4 may be a solution.
Another thing on the website: you may get better performance is you drive the transmitter 2Vpp around 1.2V centre (I guess you are feeding it 3.3V now) and prevent DC levels (RS232 UART ..? you can't.). Maybe use some manchester encoding....
Last: they specify different ranges for different antenna's. You could improve by choosing the best antenna...
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Volhout