Index: leahi_dialin/dd/proxies/td_proxy.py
===================================================================
diff -u -rb5aa0da384c5cc177f83d59aa221ae28881cd26a -r252b89bc37ea3f3e104671dfa2c59231bffc7e52
--- leahi_dialin/dd/proxies/td_proxy.py	(.../td_proxy.py)	(revision b5aa0da384c5cc177f83d59aa221ae28881cd26a)
+++ leahi_dialin/dd/proxies/td_proxy.py	(.../td_proxy.py)	(revision 252b89bc37ea3f3e104671dfa2c59231bffc7e52)
@@ -100,9 +100,25 @@
         bic = integer_to_bytearray(bicarb)
         #payload = bic +acd + byp + temp + uf + dial + stt
         payload = stt + dial + uf + temp + byp + acd + bic
-        message = DenaliMessage.build_message(channel_id=DenaliChannels.td_to_dd_ch_id,
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_dd_ch_id,
                                               message_id=MsgIds.MSG_ID_DD_GEN_DIALYSATE_REQUEST_DATA.value,
                                               payload=payload)
 
         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 ):
+        """
+        Constructs and sends a TD start pre gen dialysate request to the DD.
+
+        @return: none
+        """
+        stt = integer_to_bytearray(start)
+
+        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)
+
+        self.logger.debug("Sending TD start pre gen request to DD.")
         self.can_interface.send(message, 0)
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