diff --git a/add_button.py b/add_button.py
new file mode 100755
index 0000000..572acb4
--- /dev/null
+++ b/add_button.py
@@ -0,0 +1,56 @@
+#!/usr/bin/python3
+import serial
+import time
+import sys
+
+def list_buttons(ser):
+    ser.write(b'\r\n')
+    time.sleep(0.1)
+    ser.write(b'list_buttons\r\n')
+
+    expect_button_line = False
+    buttons_in_arduino = []
+    while True:
+        line = ser.readline()
+        if line.strip() == b"button list start":
+            expect_button_line = True
+            continue
+
+        if expect_button_line and line.startswith(b"button: "):
+            key, val = line.strip().split(b" ")
+            buttons_in_arduino.append(val)
+        if line == b"":
+            break
+    buttons_in_arduino.sort()
+    print(len(buttons_in_arduino))
+    return buttons_in_arduino
+
+def remove_button(ser, button):
+    ser.write(b'\r\n')
+    time.sleep(0.1)
+    ser.write(b'remove_button '+ button + b'\r\n')
+    while True:
+        line = ser.readline()
+        if line == b"":
+            break
+        print(line)
+
+def add_button(ser, button, secret):
+    ser.write(b'\r\n')
+    time.sleep(0.1)
+    ser.write(b'add_button '+ button + b' ' + secret + b'\r\n')
+    while True:
+        line = ser.readline()
+        if line == b"":
+            break
+        print(line)
+
+if len(sys.argv) < 3:
+    print("Usage: add_button button secret")
+    sys.exit(1)
+
+for tty in [ "/dev/ttyS1", "/dev/ttyS2" ]:
+    with serial.Serial(tty, 115200, timeout=1) as ser:
+        add_button(ser, sys.argv[1], sys.argv[2])
+
+        print(list_buttons(ser))
diff --git a/list_buttons.py b/list_buttons.py
new file mode 100755
index 0000000..31ed72a
--- /dev/null
+++ b/list_buttons.py
@@ -0,0 +1,52 @@
+#!/usr/bin/python3
+import serial
+import time
+import sys
+
+def list_buttons(ser):
+    ser.write(b'\r\n')
+    time.sleep(0.1)
+    ser.write(b'list_buttons\r\n')
+
+    expect_button_line = False
+    buttons_in_arduino = []
+    while True:
+        line = ser.readline()
+        if line.strip() == b"button list start":
+            expect_button_line = True
+            continue
+
+        if expect_button_line and line.startswith(b"button: "):
+            key, val = line.strip().split(b" ")
+            buttons_in_arduino.append(val)
+        if line == b"":
+            break
+    buttons_in_arduino.sort()
+    print(len(buttons_in_arduino))
+    return buttons_in_arduino
+
+def remove_button(ser, button):
+    ser.write(b'\r\n')
+    time.sleep(0.1)
+    ser.write(b'remove_button '+ button + b'\r\n')
+    while True:
+        line = ser.readline()
+        if line == b"":
+            break
+        print(line)
+
+def add_button(ser, button, secret):
+    ser.write(b'\r\n')
+    time.sleep(0.1)
+    ser.write(b'add_button '+ button + b' ' + secret + b'\r\n')
+    while True:
+        line = ser.readline()
+        if line == b"":
+            break
+        print(line)
+
+
+for tty in [ "/dev/ttyS1", "/dev/ttyS2" ]:
+    with serial.Serial(tty, 115200, timeout=1) as ser:
+        print(list_buttons(ser))
+
diff --git a/program_button.sh b/program_button.sh
new file mode 100755
index 0000000..6f598c5
--- /dev/null
+++ b/program_button.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+echo "Biedt een iButton aan om te (her)programmeren"
+echo "Formaat: <id>:<secret>"
+echo "CTRL+C om af te sluiten"
+cat /dev/ttyACM0