From 61f97d2d4f3ea4d4165b638f445ef898d6ab2f74 Mon Sep 17 00:00:00 2001 From: Alan Johnston Date: Thu, 18 Jun 2026 09:06:07 -0400 Subject: [PATCH] Update transmit.py add doppler time shift --- transmit.py | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/transmit.py b/transmit.py index 75f59de0..22244ac0 100644 --- a/transmit.py +++ b/transmit.py @@ -949,11 +949,18 @@ if __name__ == "__main__": print("Beacon mode off so no repeater transmission") print("Ready to detect carrier") + start_time = time.perf_counter() + doppler_start_tz = txr * 1e6 + doppler_freq_hz = txr * 1e6 while True: if (input(squelch) == False) and (command_tx == True): + doppler_freq_hz = doppler_start_hz + (time.perf_counter() - start_time) * 60 + print(doppler_freq_hz) + tx = "{:.3f}".format(doppler_freq/1000) + print(tx) print("Carrier detected, starting repeater") output(txLed, 1) - system("sudo nc -l 8011 | csdr convert_i16_f | csdr gain_ff 4000 | csdr convert_f_samplerf 20833 | sudo rpitx -i- -m RF -f " + tx + "e3 > /dev/null 2>&1 &") + system("sudo nc -l 8011 | csdr convert_i16_f | csdr gain_ff 4000 | csdr convert_f_samplerf 20833 | sudo rpitx -i- -m RF -f " + tx + " > /dev/null 2>&1 &") sleep(0.5) system("sudo arecord -D shared_mic -r48000 -fS16_LE -c1 | nc localhost 8011 &") while (input(squelch) == False):