diff --git a/tests/find_address.py b/tests/find_address.py
index 2802c24..6606f88 100755
--- a/tests/find_address.py
+++ b/tests/find_address.py
@@ -7,27 +7,29 @@ import serial
 
 print('---- Looking for device ----')
 slave_address_list = range(1,256)
+baud_list = [4800,115200]
 CO2_addr = 9
 total_devices = 0
 for slave_address in slave_address_list:
-    print(f'Address {slave_address}:\t', end='')
-    try:
-        # modbus init
-        instrument = minimalmodbus.Instrument('/dev/rs485', slave_address, close_port_after_each_call=True)  # port name, slave address (in decimal)
-        instrument.serial.baudrate = 115200
-        instrument.serial.bytesize = 8
-        instrument.serial.parity   = serial.PARITY_EVEN
-        instrument.serial.stopbits = 1
-        instrument.serial.timeout  = 0.05          # seconds
-        instrument.mode = minimalmodbus.MODE_RTU   # rtu or ascii mode
-        instrument.clear_buffers_before_each_transaction = True
-        ##
-        CO2 = instrument.read_register(CO2_addr, 1, functioncode=4) * 10
-        print('DEVICE RESPONDED')
-        total_devices += 1
-    except minimalmodbus.NoResponseError:
-        print(f'no response')
-    sleep(0.1)
+    for baud in baud_list:
+        print(f'Address {slave_address} baud {baud}:\t\t', end='')
+        try:
+            # modbus init
+            instrument = minimalmodbus.Instrument('/dev/rs485', slave_address, close_port_after_each_call=True)  # port name, slave address (in decimal)
+            instrument.serial.baudrate = baud
+            instrument.serial.bytesize = 8
+            instrument.serial.parity   = serial.PARITY_EVEN
+            instrument.serial.stopbits = 1
+            instrument.serial.timeout  = 0.05          # seconds
+            instrument.mode = minimalmodbus.MODE_RTU   # rtu or ascii mode
+            instrument.clear_buffers_before_each_transaction = True
+            ##
+            CO2 = instrument.read_register(CO2_addr, 1, functioncode=4) * 10
+            print('DEVICE RESPONDED')
+            total_devices += 1
+        except minimalmodbus.NoResponseError:
+            print(f'no response')
+        sleep(0.1)
 print(f'Found {total_devices} devices (tried {len(slave_address_list)} addresses)')
 print('---- DONE ----')
 exit(0)