diff --git a/usrc/hardware.cpp b/usrc/hardware.cpp
index 8ecf81a..fd05d0e 100644
--- a/usrc/hardware.cpp
+++ b/usrc/hardware.cpp
@@ -110,6 +110,7 @@ void Hardware::initialize(int deviceId) {
 int32_t Hardware::process_rx_packet(from_where_t fromwhere, uint8_t *packet, int32_t len, uint8_t *receipt, int32_t &receiptsize, bool &matching) {
   Cmdheader_t *cmdheader = (Cmdheader_t *)packet;
   if (fromwhere == kuart) printf("====   rx: cmdid:%d subcmdid:%d id:%d\n", cmdheader->cmdid, cmdheader->subcmdid, cmdheader->data[0]);
+  //  printf("====   rx: cmdid:%d subcmdid:%d id:%d\n", cmdheader->cmdid, cmdheader->subcmdid, cmdheader->data[0]);
   uint8_t *pdata = cmdheader->data;
   /**
    * @brief Ping
@@ -218,8 +219,26 @@ int32_t Hardware::process_rx_packet(from_where_t fromwhere, uint8_t *packet, int
     return 0;
   }
 
+  static hpp272_data_t fake_hpp272data;
+  //
   PROCESS_CMD(kcmd_m211887_operation, 0, 1) {
-    hpp272_data_t *hpp272data = hpp272.readVal();
+    // hpp272_data_t *hpp272data = hpp272.readVal();
+
+    fake_hpp272data.hydrogen_peroxide_volume                 = 101;
+    fake_hpp272data.h2o_h2o2_rs                              = 102;
+    fake_hpp272data.temperature1                             = 103;
+    fake_hpp272data.relative_humidity                        = 104;
+    fake_hpp272data.absolute_hydrogen_peroxide               = 105;
+    fake_hpp272data.h2o_h2o2dew_point_temperature            = 106;
+    fake_hpp272data.reserved1                                = 107;
+    fake_hpp272data.water_volume                             = 108;
+    fake_hpp272data.water_vapor_pressure                     = 109;
+    fake_hpp272data.absolute_humidity                        = 110;
+    fake_hpp272data.water_vapor_saturation_pressure_h2o      = 111;
+    fake_hpp272data.temperature2                             = 112;
+    fake_hpp272data.h2o2_vapor_pressure                      = 113;
+    fake_hpp272data.water_vapor_saturation_pressure_h2o_h2o2 = 114;
+    hpp272_data_t *hpp272data                                = &fake_hpp272data;
     if (hpp272data) {
       receipt[0] = 1;
       receipt[1] = 0;
diff --git a/usrc/main.cpp b/usrc/main.cpp
index 97a8d8e..41c5549 100644
--- a/usrc/main.cpp
+++ b/usrc/main.cpp
@@ -65,7 +65,7 @@ void Main::onRceivePacket(CanPacketRxBuffer *rxbuf, uint8_t *packet, size_t len)
     if (ecode != 0) {
       m_canReceiver.sendErrorAck(cmdheader, ecode);
     } else {
-      m_canReceiver.sendAck(cmdheader, rxdata, sizeof(receipt_size));
+      m_canReceiver.sendAck(cmdheader, rxdata, receipt_size);
     }
   }
 }