diff --git a/exp_images/log b/exp_images/log
new file mode 100644
index 0000000..b9ee5ea
--- /dev/null
+++ b/exp_images/log
@@ -0,0 +1,43 @@
+
+[root@yl2-a1v4rj95pppi smbus-tool]# ./build/whiteriver_exp  -i 10.57.216.109 -e 4 -c fw-down -p /home/zw/wr_exp@1.0.15.img
+WhiteRiverEXP tool
+username: root, password: 0penBmc
+===============================================
+
+CMD: fw-down,/home/zw/wr_exp@1.0.15.img
+url: https://10.57.216.109/redfish/v1/EXPservice/EXPReadReg
+exp_get_register, Payload: {"ExpanderId":4,"CmdId":241,"ReadLen":1}
+exp_get_register, Response: {
+  "Data": {
+    "CmdId": 241,
+    "DataLen": 1,
+    "ExpanderId": 4,
+    "Value": "fb"
+  },
+  "Status": "OK"
+}
+Write:10EF000000000000
+url: https://10.57.216.109/redfish/v1/EXPservice/EXPWriteReg
+exp_set_register, Payload: {"ExpanderId":4,"CmdId":240,"WriteLen":8,"Value":"10EF000000000000"}
+exp_set_register, Response: {
+  "Data": {
+    "CmdId": 240,
+    "DataLen": 8,
+    "ExpanderId": 4
+  },
+  "Status": "OK"
+}
+url: https://10.57.216.109/redfish/v1/EXPservice/EXPReadReg
+exp_get_register, Payload: {"ExpanderId":4,"CmdId":241,"ReadLen":1}
+exp_get_register, Response: {
+  "Data": {
+    "CmdId": 241,
+    "DataLen": 1,
+    "ExpanderId": 4,
+    "Value": "fb"
+  },
+  "Status": "OK"
+}
+AsyncPoll(5000)::456 = -5
+m_exp->WriteFirmware(param)::444 = -5
+CMD: fw-down,/home/zw/wr_exp@1.0.15.img return -5