Index: leahi_dialin/dd/proxies/td_proxy.py
===================================================================
diff -u -r252b89bc37ea3f3e104671dfa2c59231bffc7e52 -r807865a69903d012ecf8c2867b9fe91c26b1cc08
--- leahi_dialin/dd/proxies/td_proxy.py	(.../td_proxy.py)	(revision 252b89bc37ea3f3e104671dfa2c59231bffc7e52)
+++ leahi_dialin/dd/proxies/td_proxy.py	(.../td_proxy.py)	(revision 807865a69903d012ecf8c2867b9fe91c26b1cc08)
@@ -107,15 +107,24 @@
         self.logger.debug("Sending TD gen dialysate data request to DD.")
         self.can_interface.send(message, 0)
 
-    def cmd_td_send_dd_start_pre_gen_request(self, start: bool = 0 ):
+    def cmd_td_send_dd_start_pre_gen_request(self, start: bool = 0, dialysate_rate: float = 0.0, dialysate_temp: float = 0.0,
+                                             acid_type: int = 0, bicarb_type: int = 0 ):
         """
-        Constructs and sends a TD start pre gen dialysate request to the DD.
-
-        @return: none
+                Constructs and sends a TD start pre gen dialysate request to the DD.
+        :param start: start and stop boolean
+        :param dialysate_rate: dialysate rate in ml/min
+        :param dialysate_temp: dialysate temp in c
+        :param acid_type: acid type
+        :param bicarb_type: bicarb type
+        :return:
         """
         stt = integer_to_bytearray(start)
+        dial = float_to_bytearray(dialysate_rate)
+        temp = float_to_bytearray(dialysate_temp)
+        acd = integer_to_bytearray(acid_type)
+        bic = integer_to_bytearray(bicarb_type)
+        payload = stt + dial + temp + acd + bic
 
-        payload = stt
         message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_dd_ch_id,
                                               message_id=MsgIds.MSG_ID_DD_PRE_GEN_DIALYSATE_REQUEST_DATA.value,
                                               payload=payload)