# Latest

**URL:** https://discourse.nodered.org/latest.md?page=1227

[Latest](https://discourse.nodered.org/latest.md) · [Categories](https://discourse.nodered.org/categories.md) · [Tags](https://discourse.nodered.org/tags.md)

**Page:** 1228

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## [Loops with GPIO](https://discourse.nodered.org/t/loops-with-gpio/15623)

<div class="topic-metadata">

**Author:** [@maku12](https://discourse.nodered.org/u/maku12)\
**Replies:** 11\
**Last updated:** [18 September 2019 09:56 UTC](https://discourse.nodered.org/t/loops-with-gpio/15623 "2019-09-18T09:56:44Z")

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Hi, i want to turn on a led (gpio 17) for 2 seconds , then turn off for 5 seconds, and this should be repated 5 times. How can I do this with Nodes Red nodes? Many Thanks Kind Regards marc

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## [Split- process separately - recombine](https://discourse.nodered.org/t/split-process-separately-recombine/15576)

<div class="topic-metadata">

**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 19\
**Last updated:** [18 September 2019 09:47 UTC](https://discourse.nodered.org/t/split-process-separately-recombine/15576 "2019-09-18T09:47:47Z")

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Need a bit of help In this example - I'm splitting a msg and doing stuff in a parallel and then I want to recombine. \[{"id":"f14cd0c.f486c3","type":"inject","z":"29e0a8a9.d58188","name":"","topic":"","payload":"3",…

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## [Node-red-contrib-web-worldmap2.1.0](https://discourse.nodered.org/t/node-red-contrib-web-worldmap2-1-0/15637)

<div class="topic-metadata">

**Author:** [@raz0rsedge](https://discourse.nodered.org/u/raz0rsedge)\
**Replies:** 6\
**Last updated:** [18 September 2019 09:25 UTC](https://discourse.nodered.org/t/node-red-contrib-web-worldmap2-1-0/15637 "2019-09-18T09:25:05Z")

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Hello, thank you for the great worlmap node - it's a very nice and useful node. I recently updated my Nodes and atm I am having Version 2.1.0 I noticed that icons (serveral types of planes in my case) become invisible…

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## [Persistent Storage of Global Context](https://discourse.nodered.org/t/persistent-storage-of-global-context/15104)

<div class="topic-metadata">

**Author:** [@rholmesa](https://discourse.nodered.org/u/rholmesa)\
**Replies:** 6\
**Last updated:** [18 September 2019 08:40 UTC](https://discourse.nodered.org/t/persistent-storage-of-global-context/15104 "2019-09-18T08:40:28Z")

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Hi, Windows 10 - NR 0.20.7 I have been trying to use persistent storage to allow continuation over a restart. I have set the contextStorage to 'localfilesystem'. I can see the files as described in the documentation so…

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## [Msg.topic msg.payload syntax](https://discourse.nodered.org/t/msg-topic-msg-payload-syntax/15649)

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**Author:** [@gerry](https://discourse.nodered.org/u/gerry)\
**Replies:** 3\
**Last updated:** [18 September 2019 06:18 UTC](https://discourse.nodered.org/t/msg-topic-msg-payload-syntax/15649 "2019-09-18T06:18:48Z")

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Having read all through the forum and having read the node-red docs on functions and such I haven't found a clear answer to my question. This isn't related to a flow problem or a current project but for some reason this …

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## [Can a standard function access the name its been given?](https://discourse.nodered.org/t/can-a-standard-function-access-the-name-its-been-given/15639)

<div class="topic-metadata">

**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 2\
**Last updated:** [17 September 2019 21:56 UTC](https://discourse.nodered.org/t/can-a-standard-function-access-the-name-its-been-given/15639 "2019-09-17T21:56:31Z")

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e.g can I access the name as a variable inside the function?

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## [\`LINK\` node - not showing all the links](https://discourse.nodered.org/t/link-node-not-showing-all-the-links/15603)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 2\
**Last updated:** [17 September 2019 20:43 UTC](https://discourse.nodered.org/t/link-node-not-showing-all-the-links/15603 "2019-09-17T20:43:04Z")

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(Bug?) I wasn't looking for this, but I see it happening so here is the story: Messing about on my "Machine health" tab. There is a link node. It has an external link to another tab - logging. Ok. Hmmm... Why?…

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## [\`gauge\` option suggestion](https://discourse.nodered.org/t/gauge-option-suggestion/15549)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 12\
**Last updated:** [17 September 2019 20:41 UTC](https://discourse.nodered.org/t/gauge-option-suggestion/15549 "2019-09-17T20:41:34Z")

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If I use a gauge node, there are four modes. Gauge donut compass level I usually use gauge and donut. In these there are options for colours for values. Using level now on a job, there are no options for colour ra…

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## [Extracting Data from payload](https://discourse.nodered.org/t/extracting-data-from-payload/15582)

<div class="topic-metadata">

**Author:** [@NPLPRS](https://discourse.nodered.org/u/NPLPRS)\
**Replies:** 10\
**Last updated:** [17 September 2019 18:25 UTC](https://discourse.nodered.org/t/extracting-data-from-payload/15582 "2019-09-17T18:25:26Z")

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Hi all, Hoping someone can help as this is doing my head in! I have data coming in from a serial port (wireless USB dongle) which is connected fine and happily throwing out data whenever it arrives. The data arrives i…

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## [Alexa Voice Command to start the flow?](https://discourse.nodered.org/t/alexa-voice-command-to-start-the-flow/15606)

<div class="topic-metadata">

**Author:** [@burn](https://discourse.nodered.org/u/burn)\
**Replies:** 10\
**Last updated:** [17 September 2019 16:53 UTC](https://discourse.nodered.org/t/alexa-voice-command-to-start-the-flow/15606 "2019-09-17T16:53:02Z")

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Hello, I found ways to get stuff to turn on lights or turn them off based on door sensor state. I finally integrated my harmony and Alexa into the node - red. However, I do not know how to take advantage of it. For exa…

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## [Where is join node in source tree?](https://discourse.nodered.org/t/where-is-join-node-in-source-tree/15629)

<div class="topic-metadata">

**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 1\
**Last updated:** [17 September 2019 15:41 UTC](https://discourse.nodered.org/t/where-is-join-node-in-source-tree/15629 "2019-09-17T15:41:21Z")

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cause I can't find it anywhere

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## [Ui-chart in time limited mode fails to vertical blob on left after running fine](https://discourse.nodered.org/t/ui-chart-in-time-limited-mode-fails-to-vertical-blob-on-left-after-running-fine/15213)

<div class="topic-metadata">

**Author:** [@johnsonl](https://discourse.nodered.org/u/johnsonl)\
**Replies:** 11\
**Last updated:** [17 September 2019 14:54 UTC](https://discourse.nodered.org/t/ui-chart-in-time-limited-mode-fails-to-vertical-blob-on-left-after-running-fine/15213 "2019-09-17T14:54:56Z")

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Hello, First project using Node Red. It is used to speak to a fiber optic transceiver. On one dashboard page I have 6 ui-charts configured in line mode to show the last n time period. I've tried 5 minutes and 90 second…

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## [Is it possible to make a \`bus\` node?](https://discourse.nodered.org/t/is-it-possible-to-make-a-bus-node/15605)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 10\
**Last updated:** [17 September 2019 13:42 UTC](https://discourse.nodered.org/t/is-it-possible-to-make-a-bus-node/15605 "2019-09-17T13:42:19Z")

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Ok, this is a bit silly but I am sure people have seen this problem a few times. A flow. Lots of nodes and outputs. They are neat as they are, but you need to duplicate these wires (signals?) else where on the flow. Y…

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## [Http post request](https://discourse.nodered.org/t/http-post-request/15404)

<div class="topic-metadata">

**Author:** [@lastm4n](https://discourse.nodered.org/u/lastm4n)\
**Replies:** 1\
**Last updated:** [17 September 2019 11:50 UTC](https://discourse.nodered.org/t/http-post-request/15404 "2019-09-17T11:50:21Z")

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Hi there, Im trying to make a post request with body: 1)form\_urlencoded 2)json I have already managed to make a get request and getting the response and also to traverse through it. Any help will be appreciated, whi…

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## [Sizing dash for multiple devices](https://discourse.nodered.org/t/sizing-dash-for-multiple-devices/15624)

<div class="topic-metadata">

**Author:** [@hazymat](https://discourse.nodered.org/u/hazymat)\
**Replies:** 1\
**Last updated:** [17 September 2019 11:33 UTC](https://discourse.nodered.org/t/sizing-dash-for-multiple-devices/15624 "2019-09-17T11:33:15Z")

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I've increased my dashboard grid sizes from the default as follows, to display TWO columns with larger buttons, for tablets around the house: Otherwise, it shows three thin columns with buttons that are a bit tricky …

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## [Contains a sub string does not work](https://discourse.nodered.org/t/contains-a-sub-string-does-not-work/15621)

<div class="topic-metadata">

**Author:** [@WhiteLion](https://discourse.nodered.org/u/WhiteLion)\
**Replies:** 3\
**Last updated:** [17 September 2019 09:41 UTC](https://discourse.nodered.org/t/contains-a-sub-string-does-not-work/15621 "2019-09-17T09:41:29Z")

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Hello, I ve this payload: "Relay Off 4C:11:AE:0D:4B:48" I want to use a function node to check if the string contains "On" or "Off" and this is my function which doesnt work. pls help: if (msg.payload.contains == "Of…

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## [Updated dashboard and this error happened](https://discourse.nodered.org/t/updated-dashboard-and-this-error-happened/15620)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 2\
**Last updated:** [17 September 2019 09:34 UTC](https://discourse.nodered.org/t/updated-dashboard-and-this-error-happened/15620 "2019-09-17T09:34:59Z")

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I turned on another RPI and decided to get it up to date. The flows are were worked. The only thing I updated was the dashboard. After that I saw this error: (All nodes listed are/were installed before the update)

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## [Cannot connect to OPCUA Demo Server from Unified Automation (UaNetServer) using Node-RED IIoT Read or Write](https://discourse.nodered.org/t/cannot-connect-to-opcua-demo-server-from-unified-automation-uanetserver-using-node-red-iiot-read-or-write/15617)

<div class="topic-metadata">

**Author:** [@parth-ifam](https://discourse.nodered.org/u/parth-ifam)\
**Replies:** 6\
**Last updated:** [17 September 2019 09:30 UTC](https://discourse.nodered.org/t/cannot-connect-to-opcua-demo-server-from-unified-automation-uanetserver-using-node-red-iiot-read-or-write/15617 "2019-09-17T09:30:25Z")

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Issue Unable to connect to OPCUA Server created by Unified Automation .NET classes What happens? The IIoT OPCUA Read or Write block shows connecting but cannot connect to the Server. Server is the demo server (ServerGe…

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## [Write data from node-red to firestore](https://discourse.nodered.org/t/write-data-from-node-red-to-firestore/15610)

<div class="topic-metadata">

**Author:** [@marc](https://discourse.nodered.org/u/marc)\
**Replies:** 0\
**Last updated:** [17 September 2019 07:04 UTC](https://discourse.nodered.org/t/write-data-from-node-red-to-firestore/15610 "2019-09-17T07:04:58Z")

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Hello I am trying to connect to firebase firestore (not the real-time database). I can read my collection and document but I cannot write to it. The msg.firestore property is mentioned in the documentation but I don't …

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## [Icons to use for nodes without labels](https://discourse.nodered.org/t/icons-to-use-for-nodes-without-labels/15572)

<div class="topic-metadata">

**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 4\
**Last updated:** [17 September 2019 06:07 UTC](https://discourse.nodered.org/t/icons-to-use-for-nodes-without-labels/15572 "2019-09-17T06:07:49Z")

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Just sharing things I've come up with when removing labels from nodes to make them easy to identify \[{"id":"449f7fbf.74cb6","type":"debug","z":"912a9d45.b0769","name":"3","active":false,"tosidebar":true,"console":fals…

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## [Apache, SSL, Reverse Proxy - getting dependent files to load](https://discourse.nodered.org/t/apache-ssl-reverse-proxy-getting-dependent-files-to-load/15601)

<div class="topic-metadata">

**Author:** [@snydered](https://discourse.nodered.org/u/snydered)\
**Replies:** 0\
**Last updated:** [16 September 2019 22:25 UTC](https://discourse.nodered.org/t/apache-ssl-reverse-proxy-getting-dependent-files-to-load/15601 "2019-09-16T22:25:13Z")

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Hello! Trying to add nodeRed to an existing 2-server setup where both servers run apache and server #1 uses ProxyPass and ProxyPassReverse to handle the traffic between the backend server and the internet. Right now se…

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## [Mulitple Xbee (S2C) communication via Node Red](https://discourse.nodered.org/t/mulitple-xbee-s2c-communication-via-node-red/15571)

<div class="topic-metadata">

**Author:** [@Rishaal](https://discourse.nodered.org/u/Rishaal)\
**Replies:** 2\
**Last updated:** [16 September 2019 21:24 UTC](https://discourse.nodered.org/t/mulitple-xbee-s2c-communication-via-node-red/15571 "2019-09-16T21:24:47Z")

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Hi, I am new to node-red, can anyone help me with establishing communication between 2 xbees at first via node red. The Coordinator(xbee1) is connected to Rasp Pi 3 via serial which has node red installed whereas the ro…

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## [Help with shell command to get a result in a node](https://discourse.nodered.org/t/help-with-shell-command-to-get-a-result-in-a-node/15548)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 11\
**Last updated:** [16 September 2019 20:48 UTC](https://discourse.nodered.org/t/help-with-shell-command-to-get-a-result-in-a-node/15548 "2019-09-16T20:48:35Z")

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I am wanting to fix a message I am getting. This is the message: {"\_msgid":"3c5b556c.b18d0a","topic":"","payload":" Used\\n 688\\n","rc":{"code":0}} What I want to get is the amount of usage on a USB stick and map it to…

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## [Node-red-contrib-config broken in Node-RED beta 1.0.0?](https://discourse.nodered.org/t/node-red-contrib-config-broken-in-node-red-beta-1-0-0/15591)

<div class="topic-metadata">

**Author:** [@dudleyjosh](https://discourse.nodered.org/u/dudleyjosh)\
**Replies:** 4\
**Last updated:** [16 September 2019 19:11 UTC](https://discourse.nodered.org/t/node-red-contrib-config-broken-in-node-red-beta-1-0-0/15591 "2019-09-16T19:11:27Z")

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Has anyone else noticed that 'node-red-contrib-config' seems to be broken in v1.0.0 betas of Node-RED?

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## [\[MinorDocIssue\]Templates and non alphanumeric messages](https://discourse.nodered.org/t/minordocissue-templates-and-non-alphanumeric-messages/15595)

<div class="topic-metadata">

**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 0\
**Last updated:** [16 September 2019 19:09 UTC](https://discourse.nodered.org/t/minordocissue-templates-and-non-alphanumeric-messages/15595 "2019-09-16T19:09:26Z")

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I was sending an image (converted to Base64 string) thru a template and I couldn't decode it back to an image afterwards Eventually after testing out simpler flow, I realised that the template was seeing non-alphanumeri…

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## [Mp3 playlist through HTTP out](https://discourse.nodered.org/t/mp3-playlist-through-http-out/15541)

<div class="topic-metadata">

**Author:** [@gilad](https://discourse.nodered.org/u/gilad)\
**Replies:** 11\
**Last updated:** [16 September 2019 18:30 UTC](https://discourse.nodered.org/t/mp3-playlist-through-http-out/15541 "2019-09-16T18:30:17Z")

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Hi all, I'm struggling with this for a while. I'm trying to play all mp3 urls, one-by-one, through the HTTP out node. It works only when the function node is: msg.payload = msg.payload\[0\].url; return msg; But when I'…

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## [Sending data to Firestore using MQTT](https://discourse.nodered.org/t/sending-data-to-firestore-using-mqtt/13678)

<div class="topic-metadata">

**Author:** [@Mustaqim](https://discourse.nodered.org/u/Mustaqim)\
**Replies:** 3\
**Last updated:** [16 September 2019 17:34 UTC](https://discourse.nodered.org/t/sending-data-to-firestore-using-mqtt/13678 "2019-09-16T17:34:31Z")

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Hi, I am trying to send data from Ubidots using MQTT to Firestore. I manage to send the data but it doesn't the way I wanted because I want to send it to specify field and I want the data update in real time. Any ideas?…

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## [Trying to XOR a hexidecimal string](https://discourse.nodered.org/t/trying-to-xor-a-hexidecimal-string/15053)

<div class="topic-metadata">

**Author:** [@Stylo](https://discourse.nodered.org/u/Stylo)\
**Replies:** 6\
**Last updated:** [16 September 2019 13:56 UTC](https://discourse.nodered.org/t/trying-to-xor-a-hexidecimal-string/15053 "2019-09-16T13:56:18Z")

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Hi there, I'm working on a project in which I'm sending and receiving hexadecimal message strings from a bluetooth gateway via MQTT. My problem is; I need to XOR each hexidecimal string to make sure it's correct when p…

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## [ModBus Write Node](https://discourse.nodered.org/t/modbus-write-node/15567)

<div class="topic-metadata">

**Author:** [@injector22](https://discourse.nodered.org/u/injector22)\
**Replies:** 2\
**Last updated:** [16 September 2019 11:30 UTC](https://discourse.nodered.org/t/modbus-write-node/15567 "2019-09-16T11:30:56Z")

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I have a power meter that uses ModBus and I've figured out how to read data from the bus using the modbus read and getter node. However, now I'm trying to write to the module to change the address and I'm not sure how t…

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## [Adding a “rotate” to the ui\_numeric node?](https://discourse.nodered.org/t/adding-a-rotate-to-the-ui-numeric-node/15557)

<div class="topic-metadata">

**Author:** [@markost](https://discourse.nodered.org/u/markost)\
**Replies:** 3\
**Last updated:** [16 September 2019 09:25 UTC](https://discourse.nodered.org/t/adding-a-rotate-to-the-ui-numeric-node/15557 "2019-09-16T09:25:24Z")

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Hi, Is it possible to add that the numbers rotating in a circle after reaching the minimum / maximum selected value? It would be useful when need to select values which are close at the end of range (e.g. range is 1-60…

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