# Calculating payloads in a function, to adjust a time payload

**URL:** <https://discourse.nodered.org/t/calculating-payloads-in-a-function-to-adjust-a-time-payload/24106>\
**Category:** General\
**Created:** [2 April 2020 15:58 UTC](https://discourse.nodered.org/t/calculating-payloads-in-a-function-to-adjust-a-time-payload/24106 "2020-04-02T15:58:21Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![SmudgeMarxUK](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/smudgemarxuk/32/29335_2.png) [@SmudgeMarxUK](https://discourse.nodered.org/u/SmudgeMarxUK)\
**Post date:** [2 April 2020 15:58 UTC](https://discourse.nodered.org/t/calculating-payloads-in-a-function-to-adjust-a-time-payload/24106/1 "2020-04-02T15:58:22Z")

</div>

```auto
[{"id":"1adf96e7.285aa9","type":"debug","z":"c23bf0c8.c3a58","name":"Test1","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":770,"y":260,"wires":[]},{"id":"5ae806d1.371dc8","type":"inject","z":"c23bf0c8.c3a58","name":"BP(10sec)","topic":"GPIO/Delta","payload":"10000","payloadType":"num","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":440,"y":220,"wires":[["ac0bb6a1.e604f8"]]},{"id":"a1f821c3.fd2bd","type":"inject","z":"c23bf0c8.c3a58","name":"PD(5sec)","topic":"PauseDelta","payload":"5000","payloadType":"num","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":440,"y":260,"wires":[["ac0bb6a1.e604f8"]]},{"id":"5d3ae14c.f83d1","type":"inject","z":"c23bf0c8.c3a58","name":"PD(2.5sec)","topic":"PauseDelta","payload":"2500","payloadType":"num","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":440,"y":300,"wires":[["ac0bb6a1.e604f8"]]},{"id":"ac0bb6a1.e604f8","type":"function","z":"c23bf0c8.c3a58","name":"PauseAdjust","func":"var g = context.get(\"GPIO/Delta\") || 0;\nvar p = context.get(\"PauseDelta\") || 0;\n\nif (p >= 0 && g === 0){\n msg.topic = \"Bye\";\n p = msg.payload;\n return [msg];\n} else if (p >= 0 && g >= 0){\n msg.topic = \"Hi\";\n g = msg.payload;\n return [msg];\n} else if (p === 0 && p >= 0){\n msg.topic = \"sum\";\n r = x-y;\n r = msg.payload;\n return [msg];\n}\n//if (g.length === 2 && p.length === 0){\n// msg.payload = g;\n//} else if (g.length === 2 && p.length === 2){\n// msg.payload = g-p;\n//} else if (g.length === 2 && g >= 0){\n// msg.payload = Math.abs(g-p);\n// }else {\n // msg.payload = g;\n//}\n//msg.topic = \"Tester\"\n//eturn msg;\n\n//if (p >= 0 && g === 0){\n// msg.topic = \"Bye\";\n// p = msg.payload;\n// return [msg, null, null];\n//} else if (p >= 0 && g >= 0){\n// msg.topic = \"Hi\";\n// g = msg.payload;\n// return [null, msg, null];\n//} else if (p === 0 && p >= 0){\n// msg.topic = \"sum\";\n// x = Number(g);\n// y = Number(p);\n// r = x-y;\n// r = msg.payload;\n// return [null, null, msg];\n//}","outputs":1,"noerr":0,"x":630,"y":260,"wires":[["1adf96e7.285aa9"]]}]

```

Hi all,  
I'm struggling with the function node(another noob move), have read numerous topics, but find i seem to get myself even more befuddled.  
My aim is to use the function node to subtract a pause delta from a GPIO delta & send the adjusted payload, or just continue sending the GPIO delta, if no pause is detected.  
I've managed to achieved the goal using the switch, change, calculate & simplequeue node...but It's a mess of wires(including the rest of my flow), so i want to streamline. I'm also getting more confused, when reading about using 'CalculateSum' & 'Math' methods, as i was having some success without adding them to my scrambled brain.

The code I posted has some iterations i was attempting further below the code. Hopefully I can be nudged down the right alley, as i had great responses the last time i posted. Thanks

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [1 June 2020 15:58 UTC](https://discourse.nodered.org/t/calculating-payloads-in-a-function-to-adjust-a-time-payload/24106/2 "2020-06-01T15:58:24Z")

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