diff --git a/README.md b/README.md
index 4d35172..4c539c3 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,10 @@
 python-mbus
 ===========
 
+Added send_custom_text and tests for that and secondary addressing. Needs my fork of libmbus to work. I used sensenode fork instead of master because it seems to have addressed some issues with the original, and the original is abandoned. // Jouzer
+
+The stuff below is the original, you install this as so and then you can find the tests from /examples/ , edit the .py with your dev and sec.addr etc.
+
 Python wrapper for [libmbus](http://www.rscada.se/libmbus) ([source](https://github.com/rscada/libmbus))
 
 * installation: run ```python setup.py install```
diff --git a/examples/mbus-test-1.py b/examples/mbus-test-1.py
index 7fd3eee..d207d86 100755
--- a/examples/mbus-test-1.py
+++ b/examples/mbus-test-1.py
@@ -11,10 +11,10 @@
 from mbus.MBus import MBus
 
 debug = True
-address = 0
+address = 1
 
 #mbus = MBus(host="mbus-gw1", port=8888)
-mbus = MBus(device="/dev/ttyUSB0", libpath="/home/ph/git/python-mbus/examples/libmbus.so")
+mbus = MBus(device="/dev/ttyUSB1", libpath="/usr/local/lib/libmbus.so")
 
 if debug:
     print("mbus = " + str(mbus))
diff --git a/examples/mbus-test-secondary-send-text.py b/examples/mbus-test-secondary-send-text.py
new file mode 100755
index 0000000..dee67fe
--- /dev/null
+++ b/examples/mbus-test-secondary-send-text.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+# ------------------------------------------------------------------------------
+# Copyright (C) 2012, Robert Johansson <rob@raditex.nu>, Raditex Control AB
+# All rights reserved.
+# ------------------------------------------------------------------------------
+
+"""
+mbus test: send custom text to secondary address
+Only works with jouzer/python-mbus fork, need libmbus and python-mbus. If you reinstall,
+you probably need to sudo make clean, sudo make install in libmbus,
+and then sudo python3 setup.py install again in python-mbus
+You can check that the .so file has the new function mbus-send-custom-text with nm -D /path/to/libmbus.so , obviously change your dir there
+Also change the select_secondary_address to your Elvaco CMa10 device and device to your rs232 device (or whatever you use)
+"""
+
+from mbus.MBus import MBus
+
+debug = True
+#address = 0
+address = 0xFD #secondary
+
+
+#mbus = MBus(host="mbus-gw1", port=8888)
+mbus = MBus(device="/dev/ttyUSB0", libpath="/usr/local/lib/libmbus.so")
+
+if debug:
+    print("mbus = " + str(mbus))
+
+mbus.connect()
+
+if debug:
+    print("mbus = " + str(mbus))
+
+mbus.serial_set_baudrate(2400)
+ret = mbus.select_secondary_address("24134667FFFFFFFF")
+
+#res = mbus.send_ping_frame(0xFD, 1)
+#print(res)
+#res = mbus.send_ping_frame(0, 1)
+#print(res)
+# fairly sure these pings not needed
+text = "PYTHONpython"
+mbus.send_custom_text(address, text)
+
+try:
+    reply = mbus.recv_frame()
+    mbus.frame_free(reply)
+except Exception as e:
+    if "libmbus.mbus_recv_frame failed" in str(e):
+        reply = "Device did not respond."
+    else:
+        reply = f"Unexpected error: {e}"
+
+if debug:
+    print("reply =", reply)
+
+mbus.disconnect()
diff --git a/mbus/MBus.py b/mbus/MBus.py
index d707353..d2b867d 100644
--- a/mbus/MBus.py
+++ b/mbus/MBus.py
@@ -221,3 +221,17 @@ def send_ping_frame(self, address, purge_response):
         else:
             raise Exception("Handle object not configure")
 
+    def send_custom_text(self, address, text):
+        """
+        Send custom text to Elvaco CMa10
+        """
+        if not isinstance(text, bytes):
+            text = text.encode('utf-8')
+            
+        if self.handle:
+            if self._libmbus.send_custom_text(self.handle, address, text) == -1:
+                raise Exception("libmbus.mbus_send_custom_text failed")
+        else:
+            raise Exception("Handle object not configure")
+            
+
diff --git a/mbus/MBusLowLevel.py b/mbus/MBusLowLevel.py
index 735372f..cf3d1d8 100644
--- a/mbus/MBusLowLevel.py
+++ b/mbus/MBusLowLevel.py
@@ -272,7 +272,12 @@ def __init__(self, libpath=None):
         self.probe_secondary_address.argtypes   = [mbus_handle_p, c_char_p,
                                                     c_char_p]
         self.probe_secondary_address.restype    = c_int
-
+            
+        self.send_custom_text                 = lib.mbus_send_custom_text
+        self.send_custom_text.argtypes   = [mbus_handle_p, c_int,
+                                                    c_char_p]
+        self.send_custom_text.restype    = c_int
+            
         self.read_slave                     = lib.mbus_read_slave
         self.read_slave.argtypes            = [mbus_handle_p, mbus_address_p,
                                                 mbus_frame_p]