diff --git a/klippy/extras/mcp4018.py b/klippy/extras/mcp4018.py
index f53024b9..fd04aa66 100644
--- a/klippy/extras/mcp4018.py
+++ b/klippy/extras/mcp4018.py
@@ -31,18 +31,20 @@ class SoftwareI2C:
         self.mcu.add_config_cmd("config_digital_out oid=%d pin=%s"
                                 " value=%d default_value=%d max_duration=%d" % (
                                     self.sda_oid, sda_params['pin'], 1, 1, 0))
+    def get_mcu(self):
+        return self.mcu
     def build_config(self):
         self.mcu.add_config_cmd("config_digital_out oid=%d pin=%s value=%d"
                                 " default_value=%d max_duration=%d" % (
                                     self.scl_oid, self.scl_pin, 1, 1, 0))
         self.update_pin_cmd = self.mcu.lookup_command(
             "update_digital_out oid=%c value=%c", cq=self.cmd_queue)
-    def i2c_write(self, msg):
+    def i2c_write(self, msg, minclock=0, reqclock=0):
         msg = [self.addr] + msg
         send = self.scl_main.update_pin_cmd.send
         # Send ack
-        send([self.sda_oid, 0])
-        send([self.scl_oid, 0])
+        send([self.sda_oid, 0], minclock=minclock, reqclock=reqclock)
+        send([self.scl_oid, 0], minclock=minclock, reqclock=reqclock)
         # Send bytes
         sda_last = 0
         for data in msg:
@@ -51,17 +53,18 @@ class SoftwareI2C:
                 sda_next = not not (data & (0x80 >> i))
                 if sda_last != sda_next:
                     sda_last = sda_next
-                    send([self.sda_oid, sda_last])
-                send([self.scl_oid, 1])
-                send([self.scl_oid, 0])
+                    send([self.sda_oid, sda_last],
+                         minclock=minclock, reqclock=reqclock)
+                send([self.scl_oid, 1], minclock=minclock, reqclock=reqclock)
+                send([self.scl_oid, 0], minclock=minclock, reqclock=reqclock)
             # Transmit clock for ack
-            send([self.scl_oid, 1])
-            send([self.scl_oid, 0])
+            send([self.scl_oid, 1], minclock=minclock, reqclock=reqclock)
+            send([self.scl_oid, 0], minclock=minclock, reqclock=reqclock)
         # Send stop
         if sda_last:
-            send([self.sda_oid, 0])
-        send([self.scl_oid, 1])
-        send([self.sda_oid, 1])
+            send([self.sda_oid, 0], minclock=minclock, reqclock=reqclock)
+        send([self.scl_oid, 1], minclock=minclock, reqclock=reqclock)
+        send([self.sda_oid, 1], minclock=minclock, reqclock=reqclock)
 
 class mcp4018:
     def __init__(self, config):