diff --git a/transmit.py b/transmit.py
index 6e006fb8..c9569f08 100644
--- a/transmit.py
+++ b/transmit.py
@@ -523,29 +523,29 @@ def update_doppler(fm):
 		global mode
 		global tx
 		print("update_doppler")
-		try:
-			relative_time = (time.perf_counter() - start_time) % 370
-		except:
-			start_time = time.perf_counter()
-			relative_time = (time.perf_counter() - start_time) % 370			
-		index = int(relative_time/10)
-		print(f"relative time: {relative_time:.1f} seconds after AOS is index: {index}")
-		table_row = doppler_table[index]
-		rx_doppler_shift_hz = table_row["doppler_434_khz"] * 1000
-		if (mode == 'e'):
-			tx_doppler_shift_hz = table_row["doppler_144_khz"] * 1000
+
+		with open("/home/pi/CubeSatSim/frequency.txt", "r") as file:
+			frequencies = file.read().split()
+		
+		new_tx_frequency = int(frequencies[0])
+		new_rx_frequency = int(frequencies[1])
+		
+		print(f"New frequencies: {new_tx_frequency}, Second number: {new_tx_frequency}")
+
+		if (tx_doppler_freq_hz != new_tx_frequency) or (rx_doppler_freq_hz != new_rx_frequency):
+			tx_doppler_freq_hz = new_tx_frequency
+			rx_doppler_freq_hz = new_rx_frequency
+			print(f"Tx Doppler shift: {tx_doppler_freq_hz:.0f}")
+			rx_doppler_freq_hz = rx_doppler_start_hz + rx_doppler_shift_hz
+			print(f"Rx Doppler shift: {rx_doppler_freq_hz:.0f}")
+			if (fm != "no"):
+				rx = "{:.4f}".format(rx_doppler_freq_hz/1e6)
+				if (mode != 'e'):
+					tx = "{:.4f}".format(tx_doppler_freq_hz/1e6)
+					print(tx)
+				program_fm(rx,tx,rxpl_value,sq,txpl_value)
 		else:
-			tx_doppler_shift_hz = rx_doppler_shift_hz 
-		tx_doppler_freq_hz = tx_doppler_start_hz + tx_doppler_shift_hz
-		print(f"Tx Doppler shift: {tx_doppler_freq_hz:.0f}")
-		rx_doppler_freq_hz = rx_doppler_start_hz + rx_doppler_shift_hz
-		print(f"Rx Doppler shift: {rx_doppler_freq_hz:.0f}")
-		if (fm != "no"):
-			rx = "{:.4f}".format(rx_doppler_freq_hz/1e6)
-			if (mode != 'e'):
-				tx = "{:.4f}".format(tx_doppler_freq_hz/1e6)
-				print(tx)
-			program_fm(rx,tx,rxpl_value,sq,txpl_value)
+			print("No frequency changes!")
 		
 	except:
 		print("update_doppler failed")