diff --git a/README.md b/README.md
index 7de089a8..cb1e5402 100644
--- a/README.md
+++ b/README.md
@@ -44,8 +44,8 @@ In other cases you can contact the developer via email: <img src="https://raw.gi
 **General remark:** Beside the `firmware.bin`, typically also the content of `/html` needs to be updated!
 
 
-##### Rolling - (2021-05-22)
-* Bug fix: calculation of flow rate
+##### Rolling - (2021-05-22 - v2)
+* Bug fix: calculation of flow rate, MQTT sending of rate
 
 Rolling - (2021-05-20)
 * Bug fix: mqtt retain message flag
diff --git a/code/components/jomjol_flowcontroll/ClassFlowMQTT.cpp b/code/components/jomjol_flowcontroll/ClassFlowMQTT.cpp
index dfc5651d..1d0e4c1b 100644
--- a/code/components/jomjol_flowcontroll/ClassFlowMQTT.cpp
+++ b/code/components/jomjol_flowcontroll/ClassFlowMQTT.cpp
@@ -165,7 +165,7 @@ bool ClassFlowMQTT::doFlow(string zwtime)
         MQTTPublish(topicRate, resultrate);
     }
 
-    if (topicRate.length() > 0) {
+    if (topicTimeStamp.length() > 0) {
         MQTTPublish(topicTimeStamp, resulttimestamp);
     }
 
diff --git a/code/main/version.cpp b/code/main/version.cpp
index 1d999e99..e0311dc2 100644
--- a/code/main/version.cpp
+++ b/code/main/version.cpp
@@ -1,4 +1,4 @@
-const char* GIT_REV="528a443";
+const char* GIT_REV="8a26b81";
 const char* GIT_TAG="";
 const char* GIT_BRANCH="rolling";
-const char* BUILD_TIME="2021-05-22 07:33";
\ No newline at end of file
+const char* BUILD_TIME="2021-05-22 11:34";
\ No newline at end of file
diff --git a/code/version.cpp b/code/version.cpp
index 1d999e99..e0311dc2 100644
--- a/code/version.cpp
+++ b/code/version.cpp
@@ -1,4 +1,4 @@
-const char* GIT_REV="528a443";
+const char* GIT_REV="8a26b81";
 const char* GIT_TAG="";
 const char* GIT_BRANCH="rolling";
-const char* BUILD_TIME="2021-05-22 07:33";
\ No newline at end of file
+const char* BUILD_TIME="2021-05-22 11:34";
\ No newline at end of file
diff --git a/firmware/bootloader.bin b/firmware/bootloader.bin
index 5b9480f6..dd9b63f4 100644
Binary files a/firmware/bootloader.bin and b/firmware/bootloader.bin differ
diff --git a/firmware/firmware.bin b/firmware/firmware.bin
index cbd5ee19..c74baa92 100644
Binary files a/firmware/firmware.bin and b/firmware/firmware.bin differ