# Node red not displaying ram data

**URL:** <https://discourse.nodered.org/t/node-red-not-displaying-ram-data/7788>\
**Category:** General\
**Created:** [10 February 2019 01:32 UTC](https://discourse.nodered.org/t/node-red-not-displaying-ram-data/7788 "2019-02-10T01:32:26Z")\
**Posts on this page:** 10\
**Page:** 1

<div class="post-metadata">

**Author:** ![mason08](https://avatars.discourse-cdn.com/v4/letter/m/a4c791/32.png) [@mason08](https://discourse.nodered.org/u/mason08)\
**Post date:** [10 February 2019 01:32 UTC](https://discourse.nodered.org/t/node-red-not-displaying-ram-data/7788/1 "2019-02-10T01:32:26Z")

</div>

This is the flow im using,

```auto
[{"id":"29c5c29f.0ccade","type":"ui_gauge","z":"5bbec9a5.28ca08","name":"","group":"c998f325.2a7bc","order":2,"width":0,"height":0,"gtype":"gage","title":"CPU Temperature","label":"Degrees F","format":"{{value}}","min":"40","max":"150","colors":["#00b500","#e6e600","#ca3838"],"seg1":"","seg2":"","x":1099,"y":104,"wires":[]},{"id":"756e68c1.63f4f8","type":"exec","z":"5bbec9a5.28ca08","command":"vcgencmd measure_temp","addpay":false,"append":"","useSpawn":"","timer":"","name":"RPi Temp.","x":496,"y":137,"wires":[["cd08e15.bd9662"],[],[]]},{"id":"8c053f83.c1a2c","type":"inject","z":"5bbec9a5.28ca08","name":"","topic":"","payload":"","payloadType":"date","repeat":"1","crontab":"","once":false,"onceDelay":"","x":290.5,"y":145.25,"wires":[["756e68c1.63f4f8","97a598e9.2e0018","7a86592f.679968"]]},{"id":"cd08e15.bd9662","type":"function","z":"5bbec9a5.28ca08","name":"","func":"str = msg.payload\nmsg.payload = str.substring(5,9);\nreturn msg;","outputs":1,"noerr":0,"x":676,"y":137,"wires":[["a845c6d0.b035e8"]]},{"id":"264838c0.f9ead8","type":"ui_button","z":"5bbec9a5.28ca08","name":"","group":"ca8f3c67.b213c","order":2,"width":0,"height":0,"label":"Reboot","color":"","bgcolor":"","icon":"","payload":"","payloadType":"str","topic":"","x":266,"y":517,"wires":[["5ce5c280.b83d4c"]]},{"id":"5ce5c280.b83d4c","type":"exec","z":"5bbec9a5.28ca08","command":"sudo reboot","addpay":false,"append":"","useSpawn":"","timer":"","name":"Reboot","x":484,"y":517,"wires":[[],[],[]]},{"id":"f82e6c7a.7c664","type":"ui_button","z":"5bbec9a5.28ca08","name":"","group":"ca8f3c67.b213c","order":3,"width":0,"height":0,"label":"Shutdown","color":"","bgcolor":"red","icon":"","payload":"","payloadType":"str","topic":"","x":274.5,"y":561.25,"wires":[["8b933e22.73a26"]]},{"id":"8b933e22.73a26","type":"exec","z":"5bbec9a5.28ca08","command":"sudo shutdown -h now","addpay":false,"append":"","useSpawn":"","timer":"","name":"Shutdown","x":495.5,"y":579.25,"wires":[[],[],[]]},{"id":"b21ec346.6e944","type":"ui_chart","z":"5bbec9a5.28ca08","name":"","group":"c998f325.2a7bc","order":3,"width":0,"height":0,"label":"","chartType":"line","legend":"false","xformat":"HH:mm:ss","interpolate":"linear","nodata":"","dot":false,"ymin":"","ymax":"","removeOlder":"24","removeOlderPoints":"","removeOlderUnit":"3600","cutout":0,"useOneColor":false,"colors":["#1f77b4","#aec7e8","#ff7f0e","#2ca02c","#98df8a","#d62728","#ff9896","#9467bd","#c5b0d5"],"useOldStyle":true,"x":1089,"y":163,"wires":[[],[]]},{"id":"97a598e9.2e0018","type":"exec","z":"5bbec9a5.28ca08","command":"top -d 0.5 -b -n2 | grep \"Cpu(s)\"|tail -n 1 | awk '{print $2 + $4}'","addpay":false,"append":"","useSpawn":"","timer":"","name":"CPU Load","x":496,"y":217,"wires":[["3ad9f72a.5cd698"],[],[]]},{"id":"7a86592f.679968","type":"exec","z":"5bbec9a5.28ca08","command":"free | grep Mem | awk '{print 100*($4+$6+$7)/$2}'","addpay":false,"append":"","useSpawn":"","timer":"","name":"Free Memory","x":496,"y":297,"wires":[["f6b57c6b.c6224","8f6b01b5.29a2"],[],[]]},{"id":"3ad9f72a.5cd698","type":"ui_gauge","z":"5bbec9a5.28ca08","name":"","group":"c998f325.2a7bc","order":1,"width":0,"height":0,"gtype":"gage","title":"Processor","label":"CPU % Usage","format":"{{value}}","min":0,"max":"100","colors":["#00b500","#e6e600","#ca3838"],"seg1":"","seg2":"","x":856,"y":217,"wires":[]},{"id":"f6b57c6b.c6224","type":"ui_gauge","z":"5bbec9a5.28ca08","name":"","group":"dd04219d.3c55d","order":1,"width":0,"height":0,"gtype":"gage","title":"Memory","label":"RAM","format":"{{value.toFixed(1)}}","min":0,"max":"100","colors":["#00b500","#e6e600","#ca3838"],"x":856,"y":297,"wires":[]},{"id":"efb4235d.83a2e","type":"exec","z":"5bbec9a5.28ca08","command":"df -h","addpay":false,"append":"","useSpawn":"","timer":"","name":"Disk Usage","x":496,"y":377,"wires":[["441ec2d8.919dac"],[],[]]},{"id":"4ef67924.4a3d48","type":"ui_gauge","z":"5bbec9a5.28ca08","name":"","group":"67638498.5c2e5c","order":1,"width":0,"height":0,"gtype":"gage","title":"Disk","label":"Usage","format":"{{value}}","min":0,"max":"100","colors":["#00b500","#e6e600","#ca3838"],"x":856,"y":377,"wires":[]},{"id":"441ec2d8.919dac","type":"function","z":"5bbec9a5.28ca08","name":"","func":"var re = /([0-9]{2})%/\nvar idx = msg.payload.search(re);\nvar str = msg.payload;\nif (idx >=0) {\n str = msg.payload.substring(idx, idx + 2);\n}\nmsg.payload = str;\nreturn msg;","outputs":1,"noerr":0,"x":676,"y":377,"wires":[["4ef67924.4a3d48"]]},{"id":"71c53119.f34e6","type":"inject","z":"5bbec9a5.28ca08","name":"","topic":"","payload":"","payloadType":"date","repeat":"1","crontab":"","once":false,"onceDelay":"","x":296,"y":377,"wires":[["efb4235d.83a2e"]]},{"id":"a845c6d0.b035e8","type":"function","z":"5bbec9a5.28ca08","name":"convert C to F","func":"var tempc = msg.payload;\n tempf = tempc * 9/5 + 32;\n tempf = Math.round(tempf * 10) / 10;\n msg.payload = tempf;\n return msg;\n","outputs":1,"noerr":0,"x":870,"y":125,"wires":[["29c5c29f.0ccade","b21ec346.6e944"]]},{"id":"8f6b01b5.29a2","type":"debug","z":"5bbec9a5.28ca08","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":1100,"y":322,"wires":[]},{"id":"c998f325.2a7bc","type":"ui_group","z":"","name":"Col1","tab":"19ff6ee5.9a1551","order":1,"disp":false,"width":"6"},{"id":"ca8f3c67.b213c","type":"ui_group","z":"","name":"Actions","tab":"19ff6ee5.9a1551","order":4,"disp":true,"width":"6"},{"id":"dd04219d.3c55d","type":"ui_group","z":"","name":"Col2","tab":"19ff6ee5.9a1551","order":2,"disp":false,"width":"6"},{"id":"67638498.5c2e5c","type":"ui_group","z":"","name":"Col3","tab":"19ff6ee5.9a1551","order":3,"disp":false,"width":"6"},{"id":"19ff6ee5.9a1551","type":"ui_tab","z":"","name":"RPi Control","icon":"dashboard","order":1}]

```

My issue is it wont show the ram data. Im getting a error in debug of  
"TypeError: Cannot read property 'toFixed(1)' of undefined

---

<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [10 February 2019 09:51 UTC](https://discourse.nodered.org/t/node-red-not-displaying-ram-data/7788/2 "2019-02-10T09:51:42Z")

</div>

Which node is giving that error? If you hover over the error the node should be highlighted. Alternatively give all your nodes names and then the name should be displayed.  
Once you work out which node put a debug node showing what is going into that node and check that the message you are sending it looks ok.

---

<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [10 February 2019 11:30 UTC](https://discourse.nodered.org/t/node-red-not-displaying-ram-data/7788/3 "2019-02-10T11:30:55Z")

</div>

Are you sending a number or a string to the gauge? Turn on your debug node and look at the results.

---

<div class="post-metadata">

**Author:** ![mason08](https://avatars.discourse-cdn.com/v4/letter/m/a4c791/32.png) [@mason08](https://discourse.nodered.org/u/mason08)\
**Post date:** [10 February 2019 15:29 UTC](https://discourse.nodered.org/t/node-red-not-displaying-ram-data/7788/4 "2019-02-10T15:29:53Z")

</div>

Thats the free memory function node. The error im getting is from the degug node on the output of the function node.

---

<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [10 February 2019 15:38 UTC](https://discourse.nodered.org/t/node-red-not-displaying-ram-data/7788/5 "2019-02-10T15:38:00Z")

</div>

try changing the `Value format` to `{{value | number:1}}%`

---

<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [10 February 2019 16:07 UTC](https://discourse.nodered.org/t/node-red-not-displaying-ram-data/7788/6 "2019-02-10T16:07:36Z")

</div>

> [@mason08](#):
>
> The error im getting is from the degug node

I suspect that is not correct, I suspect it is the gauge as @zenofmud has suggested. It is likely caused by the fact you are sending it a string (containing a number) not an actual number.

---

<div class="post-metadata">

**Author:** ![mason08](https://avatars.discourse-cdn.com/v4/letter/m/a4c791/32.png) [@mason08](https://discourse.nodered.org/u/mason08)\
**Post date:** [10 February 2019 16:16 UTC](https://discourse.nodered.org/t/node-red-not-displaying-ram-data/7788/7 "2019-02-10T16:16:34Z")

</div>

Sorry i just realized its a execute node. Its command is free | grep Mem | awk '{print 100\*($4+$6+$7)/$2}'

---

<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [10 February 2019 16:18 UTC](https://discourse.nodered.org/t/node-red-not-displaying-ram-data/7788/8 "2019-02-10T16:18:37Z")

</div>

Have you made the change to the gauge?

---

<div class="post-metadata">

**Author:** ![mason08](https://avatars.discourse-cdn.com/v4/letter/m/a4c791/32.png) [@mason08](https://discourse.nodered.org/u/mason08)\
**Post date:** [10 February 2019 19:27 UTC](https://discourse.nodered.org/t/node-red-not-displaying-ram-data/7788/9 "2019-02-10T19:27:29Z")

</div>

I changed it and now it works. Even the debug displays it correctly. I thought the debug just forwarded what was being outputted?

---

<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [10 February 2019 20:10 UTC](https://discourse.nodered.org/t/node-red-not-displaying-ram-data/7788/10 "2019-02-10T20:10:02Z")

</div>

It displays whatever is given to it, the error was not coming from the debug, it was coming from the gauge.