# Trying to add two inputs, but not sure how
**URL:** https://discourse.nodered.org/t/trying-to-add-two-inputs-but-not-sure-how/81144
**Category:** General
**Created:** [8 September 2023 13:58 UTC](https://discourse.nodered.org/t/trying-to-add-two-inputs-but-not-sure-how/81144 "2023-09-08T13:58:06Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@rmystique](https://discourse.nodered.org/u/rmystique)
#### Post date: [8 September 2023 13:58 UTC](https://discourse.nodered.org/t/trying-to-add-two-inputs-but-not-sure-how/81144/1 "2023-09-08T13:58:06Z")
Here is what I have pieced together, but not sure what I'm doing here, not getting any output to the debug?
```auto
[
{
"id": "6d7c3b91d83d126b",
"type": "function",
"z": "f672d0ac69fd5b97",
"name": "function 4",
"func": "var temp = (msg.payload.solar1[2]) + (msg.payload.solar2[2])\nmsg.payload = temp;\nreturn msg;",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 760,
"y": 800,
"wires": [
[
"eb237cb28b7f1809"
]
]
},
{
"id": "7f4787605eed55ed",
"type": "change",
"z": "f672d0ac69fd5b97",
"name": "solar 2",
"rules": [
{
"t": "set",
"p": "payload.solar2",
"pt": "msg",
"to": "payload",
"tot": "msg"
}
],
"action": "",
"property": "",
"from": "",
"to": "",
"reg": false,
"x": 550,
"y": 820,
"wires": [
[
"6d7c3b91d83d126b",
"0a5716f2b228d0a8"
]
]
},
{
"id": "1bf92e4a2cae2cc4",
"type": "change",
"z": "f672d0ac69fd5b97",
"name": "solar 1",
"rules": [
{
"t": "set",
"p": "payload.solar1",
"pt": "msg",
"to": "payload",
"tot": "msg"
}
],
"action": "",
"property": "",
"from": "",
"to": "",
"reg": false,
"x": 550,
"y": 780,
"wires": [
[
"6d7c3b91d83d126b",
"a30c261616a90884"
]
]
},
{
"id": "eb237cb28b7f1809",
"type": "debug",
"z": "f672d0ac69fd5b97",
"name": "debug 21",
"active": true,
"tosidebar": false,
"console": false,
"tostatus": true,
"complete": "payload",
"targetType": "msg",
"statusVal": "payload",
"statusType": "auto",
"x": 920,
"y": 800,
"wires": []
},
{
"id": "0a5716f2b228d0a8",
"type": "debug",
"z": "f672d0ac69fd5b97",
"name": "debug 22",
"active": true,
"tosidebar": false,
"console": false,
"tostatus": true,
"complete": "payload",
"targetType": "msg",
"statusVal": "payload",
"statusType": "auto",
"x": 720,
"y": 840,
"wires": []
},
{
"id": "a30c261616a90884",
"type": "debug",
"z": "f672d0ac69fd5b97",
"name": "debug 23",
"active": true,
"tosidebar": false,
"console": false,
"tostatus": true,
"complete": "payload",
"targetType": "msg",
"statusVal": "payload",
"statusType": "auto",
"x": 720,
"y": 760,
"wires": []
}
]
```
---
### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [8 September 2023 14:15 UTC](https://discourse.nodered.org/t/trying-to-add-two-inputs-but-not-sure-how/81144/2 "2023-09-08T14:15:26Z")
A fundamental point to be aware of in Node-RED is that messages NEVER arrive from two separate wires into a node at the same time.
With that in mind, you need some way to `join` the two incoming messages into 1 `msg` so that you can access both properties at the same time. Luckily, there is a `join` node for this very purpose
See [this article in the cookbook](https://cookbook.nodered.org/basic/join-streams) for an example of how to join messages into one object.
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [22 September 2023 14:16 UTC](https://discourse.nodered.org/t/trying-to-add-two-inputs-but-not-sure-how/81144/3 "2023-09-22T14:16:06Z")
This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.