diff --git a/libraries/mqtt.xml b/libraries/mqtt.xml
index 57f73e5c..6a07e76c 100644
--- a/libraries/mqtt.xml
+++ b/libraries/mqtt.xml
@@ -1 +1 @@
-<blocks app="Snap! 7, https://snap.berkeley.edu" version="2"><palette><category name="MQTT" color="143,0,100,1"/></palette><block-definition s="$cloudOutline MQTT connect to %&apos;broker&apos; $nl $options-1-192-192-192 %&apos;options&apos;" type="command" category="MQTT"><comment x="0" y="0" w="416.6666666666666" collapsed="false">Connect to a broker&#xD;&#xD;The options are not required but can be filled if needed&#xD;&#xD;1. username (some brokers need this)&#xD;2. password (some brokers need this)&#xD;3. keepalive (default time is 60 seconds but some brokers need a shorter time)&#xD;4. connection callback (ringed set of scripts to be run when connection is made or remade)&#xD;&#xD;Note: The connection callback doesn&apos;&apos;t have to be the 4th option - it just has to be the last (or only) option.&#xD;&#xD;ADVANCED: The brokers offered in the menu are accessed using default ports and  basepaths (if needed).  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topic %&apos;topic&apos; $nl on each message run %&apos;callback&apos;" type="command" category="MQTT"><comment x="0" y="0" w="216.9999999999999" collapsed="false">Subscribe to a topic on a broker&#xD;&#xD;Make sure you have already run an MQTT connect block before using this one&#xD;&#xD;You should add a script to be run inside he grey ring.&#xD;&#xD;It will be run each time a message is received&#xD;&#xD;If you click on the arrow on the grey ring twice, you can use #1 and #2 inside yoiru script.&#xD;&#xD;#1 will contain the received message&#xD;&#xD;#2 will contain the received topic name</comment><header></header><code></code><translations></translations><inputs><input type="%s">broker.emqx.io<options>broker.emqx.io&#xD;mqtt.eclipseprojects.io&#xD;test.mosquitto.org&#xD;broker.xmqtt.net</options></input><input type="%s">name</input><input type="%cmdRing"></input></inputs><script><block s="doApplyExtension"><l>src_load(url)</l><list><l>libraries/mqtt.js</l></list></block><block s="doApplyExtension"><l>src_load(url)</l><list><l>libraries/mqttExtension.js</l></list></block><block s="doApplyExtension"><l>mqt_sub(broker,topic,callback,options)</l><list><block var="broker"/><block var="topic"/><block var="callback"/><l></l></list></block></script></block-definition><block-definition s="$cloudOutline MQTT unsubscribe from %&apos;broker&apos; 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topic %&apos;topic&apos;" type="command" category="MQTT"><header></header><code></code><translations></translations><inputs><input type="%s">broker.emqx.io<options>broker.emqx.io&#xD;mqtt.eclipseprojects.io&#xD;test.mosquitto.org&#xD;broker.xmqtt.net</options></input><input type="%s">name</input></inputs><script><block s="doApplyExtension"><l>src_load(url)</l><list><l>libraries/mqtt.js</l></list></block><block s="doApplyExtension"><l>src_load(url)</l><list><l>libraries/mqttExtension.js</l></list></block><block s="doApplyExtension"><l>mqt_unsub(broker,topic)</l><list><block var="broker"/><block var="topic"/></list></block></script></block-definition><block-definition s="$cloudOutline MQTT disconnect from %&apos;broker&apos;" type="command" category="MQTT"><header></header><code></code><translations></translations><inputs><input type="%s">all<options>all&#xD;broker.emqx.io&#xD;mqtt.eclipseprojects.io&#xD;test.mosquitto.org&#xD;broker.xmqtt.net</options></input></inputs><script><block s="doApplyExtension"><l>src_load(url)</l><list><l>libraries/mqtt.js</l></list></block><block s="doApplyExtension"><l>src_load(url)</l><list><l>libraries/mqttExtension.js</l></list></block><block s="doApplyExtension"><l>mqt_disconnect(broker)</l><list><block var="broker"/></list></block></script></block-definition><block-definition s="$cloudOutline MQTT response %&apos;broker&apos; topic %&apos;topic&apos; $nl reply %&apos;reply&apos;" type="command" category="MQTT"><header></header><code></code><translations></translations><inputs><input type="%s">broker.emqx.io<options>broker.emqx.io&#xD;mqtt.eclipseprojects.io&#xD;test.mosquitto.org&#xD;broker.xmqtt.net</options></input><input type="%s">name</input><input type="%repRing"></input></inputs><script><block s="doDeclareVariables"><list><l>resp</l><l>callbackTopic</l><l>error</l></list></block><custom-block s="$cloudOutline MQTT subscribe to %s topic %s %br on each message run %cmdRing"><block var="broker"/><block var="topic"/><block s="reifyScript"><script><block s="doIf"><block s="reportGreaterThan"><block s="reportApplyExtension"><l>txt_indexof(sub, txt)</l><list><l>/@</l><block var="received topic"/></list></block><l>0</l></block><script><block s="doApplyExtension"><l>err_try(cmd, catch, err)</l><list><block s="reifyScript"><script><block s="doSetVar"><l>resp</l><block s="evaluate"><block var="reply"/><list><block var="received payload"/><block var="received topic"/></list></block></block></script><list></list></block><block s="reifyScript"><script><block s="doSetVar"><l>resp</l><block s="evaluate"><block var="reply"/><list></list></block></block></script><list></list></block><block var="error"/></list></block><block s="doApplyExtension"><l>err_reset</l><list></list></block><block s="doSetVar"><l>callbackTopic</l><block s="reportListItem"><l><option>last</option></l><block s="reportTextSplit"><block var="received topic"/><l>@</l></block></block></block><custom-block s="$cloudOutline MQTT publish to %s topic %s payload %s %br $options-1-192-192-192 %mult%s"><block var="broker"/><block var="callbackTopic"/><block var="resp"/><list><l></l></list></custom-block></script></block></script><list><l>received payload</l><l>received topic</l></list></block></custom-block></script></block-definition><block-definition s="$cloudOutline MQTT request %&apos;broker&apos; topic %&apos;topic&apos; $nl response topic %&apos;rtopic&apos; payload %&apos;payload&apos; $nl on response run %&apos;callback&apos;" type="command" category="MQTT"><header></header><code></code><translations></translations><inputs><input type="%s">broker.emqx.io<options>broker.emqx.io&#xD;mqtt.eclipseprojects.io&#xD;test.mosquitto.org&#xD;broker.xmqtt.net</options></input><input type="%s">name</input><input type="%s">name2</input><input type="%s">hello</input><input type="%cmdRing"></input></inputs><script><block s="doDeclareVariables"><list><l>error</l></list></block><custom-block s="$cloudOutline MQTT subscribe to %s topic %s %br on each message run %cmdRing"><block var="broker"/><block s="reportJoinWords"><list><block var="rtopic"/></list></block><block s="reifyScript"><script><block s="doApplyExtension"><l>err_try(cmd, catch, err)</l><list><block s="reifyScript"><script><block s="doRun"><block var="callback"/><list><block var="received payload"/><block var="received topic"/></list></block></script><list></list></block><block s="reifyScript"><script><block s="doRun"><block var="callback"/><list></list></block></script><list></list></block><block var="error"/></list></block></script><list><l>received payload</l><l>received topic</l></list></block></custom-block><custom-block s="$cloudOutline MQTT publish to %s topic %s payload %s %br $options-1-192-192-192 %mult%s"><block var="broker"/><block s="reportJoinWords"><list><block var="topic"/><l>/</l><block s="reportJoinWords"><list><l>@</l><block var="rtopic"/></list></block></list></block><block var="payload"/><list><l></l></list></custom-block></script></block-definition><block-definition s="$cloudOutline MQTT example response reporter payload %&apos;payload&apos; topic %&apos;topic&apos;" type="reporter" category="MQTT"><header></header><code></code><translations></translations><inputs><input type="%s">hello</input><input type="%txt">name</input></inputs><script><block s="doReport"><block s="reportJoinWords"><list><l>Echo: </l><block var="payload"/></list></block></block></script></block-definition><block-definition s="$cloudOutline MQTT request %&apos;broker&apos; topic %&apos;topic&apos; $nl response topic %&apos;rtopic&apos; payload %&apos;payload&apos; $nl $options-1-192-192-192 %&apos;options&apos;" type="reporter" category="MQTT"><comment x="0" y="0" w="343" collapsed="false">The response topic should be a unique value for each call e.g. use timer&#xD;&#xD;There is only 1 option at present&#xD;1.  Timeout value - default is 3 seconds</comment><header></header><code></code><translations></translations><inputs><input type="%s">broker.emqx.io<options>broker.emqx.io&#xD;mqtt.eclipseprojects.io&#xD;test.mosquitto.org&#xD;broker.xmqtt.net</options></input><input type="%s">name</input><input type="%s">name2</input><input type="%s">hello</input><input type="%mult%s"></input></inputs><script><block s="doDeclareVariables"><list><l>resp</l><l>semaphore</l><l>timer0</l><l>timeout</l></list></block><block s="doSetVar"><l>semaphore</l><l>0</l></block><block s="doSetVar"><l>timeout</l><block s="reportIfElse"><block s="reportIsA"><block s="reportListItem"><l>1</l><block var="options"/></block><l><option>number</option></l></block><block s="reportListItem"><l>1</l><block var="options"/></block><l>3</l></block></block><block s="doSetVar"><l>resp</l><l>timeout</l></block><custom-block s="$cloudOutline MQTT subscribe to %s topic %s %br on each message run %cmdRing"><block var="broker"/><block s="reportJoinWords"><list><block var="rtopic"/></list></block><block s="reifyScript"><script><block s="doSetVar"><l>resp</l><block var="received payload"/></block><block s="doSetVar"><l>semaphore</l><l>1</l></block></script><list><l>received payload</l><l>received topic</l></list></block></custom-block><custom-block s="$cloudOutline MQTT publish to %s topic %s payload %s %br $options-1-192-192-192 %mult%s"><block var="broker"/><block s="reportJoinWords"><list><block var="topic"/><l>/</l><block s="reportJoinWords"><list><l>@</l><block var="rtopic"/></list></block></list></block><block var="payload"/><list><l></l></list></custom-block><block s="doSetVar"><l>timer0</l><block s="reportDate"><l><option>time in milliseconds</option></l></block></block><block s="doWaitUntil"><block s="reportOr"><block s="reportEquals"><block var="semaphore"/><l>1</l></block><block s="reportGreaterThan"><block s="reportDifference"><block s="reportDate"><l><option>time in milliseconds</option></l></block><block var="timer0"/></block><block s="reportVariadicProduct"><list><block var="timeout"/><l>1000</l></list></block></block></block></block><custom-block s="$cloudOutline MQTT unsubscribe from %s topic %s"><block var="broker"/><block s="reportJoinWords"><list><block var="rtopic"/></list></block></custom-block><block s="doReport"><block var="resp"/></block></script></block-definition></blocks>