# Publishing several fields in one event
**URL:** https://community.particle.io/t/publishing-several-fields-in-one-event/33121
**Category:** Troubleshooting
**Created:** [May 24, 2017, 11:00am UTC](https://community.particle.io/t/publishing-several-fields-in-one-event/33121 "2017-05-24T11:00:48Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@ecabanas](https://community.particle.io/u/ecabanas)
#### Post date: [May 24, 2017, 11:00am UTC](https://community.particle.io/t/publishing-several-fields-in-one-event/33121/1 "2017-05-24T11:00:48Z")
Hi,
I have 2 sensors that reads and after the data is published. After that we use webhook to send the info to our server.
Every reading does a push, but the problem is we make a lot of pushes from the same machine. Is it possible to publish a string of data? for example
Sensor1: 25.6 Sensor2: 22.6 in one event?
Thank’s
Eduard
---
### Author:  [@ScruffR](https://community.particle.io/u/ScruffR)
#### Post date: [May 24, 2017, 11:22am UTC](https://community.particle.io/t/publishing-several-fields-in-one-event/33121/2 "2017-05-24T11:22:04Z")
Yes it is and the prefered way is via [`snprintf()`](http://www.cplusplus.com/reference/cstdio/snprintf/?kw=snprintf) and in JSON format.
Just for the records
> [@ecabanas](#):
>
> Is it possible to publish a string of data?
It's not only possible but publishing _strings_ is the _ **only** _ thing that works even with single values 😉
---
### Author:  [@ecabanas](https://community.particle.io/u/ecabanas)
#### Post date: [May 24, 2017, 1:42pm UTC](https://community.particle.io/t/publishing-several-fields-in-one-event/33121/3 "2017-05-24T13:42:43Z")
Hi ScruffR
I did what you suggest but the result (json with event Ulatracker) comes with values completely wrong:
You can see the data with vlues without sense:
See the code below:
Thank’s for your eternal patience
Eduard
```auto
sensor.read();
double tempeatureFresh = sensor.celsius();
Particle.publish("tempeatureFresh", String(tempeatureFresh), PRIVATE);
digitalWrite(D4, LOW);
delay(5000);
digitalWrite(D5, HIGH);
//Reading Temperature Frozen
sensor2.read();
double temperatureFrozen = sensor2.celsius();
Particle.publish("temperatureFrozen", String(temperatureFrozen), PRIVATE);
//Particle.publish("temperatureFrozen", String(sensor2.celsius()), PRIVATE);
digitalWrite(D5, LOW);
//Reading battery level
FuelGauge fuel;
//float batt;
float batt = fuel.getVCell();
sprintf(publishString,"{\"tempeatureFresh\": %u, \"temperatureFrozen\": %u, \"batt\": %u}",tempeatureFresh,temperatureFrozen,batt);
Particle.publish("UlaTracker",publishString);
```
---
### Author:  [@ScruffR](https://community.particle.io/u/ScruffR)
#### Post date: [May 24, 2017, 2:14pm UTC](https://community.particle.io/t/publishing-several-fields-in-one-event/33121/4 "2017-05-24T14:14:25Z")
For `float` and `double` input variables `snprintf()` would require you to use something like `"%.1f"` instead of `"%u"`.
`snprintf()` uses the same formatting pattern as [`printf()`](http://www.cplusplus.com/reference/cstdio/printf/)
`%u` stands for unsigned decimal _integer_ - meaning an integer input type not to be confused with the output format.
---
### Author:  [@ecabanas](https://community.particle.io/u/ecabanas)
#### Post date: [May 24, 2017, 2:20pm UTC](https://community.particle.io/t/publishing-several-fields-in-one-event/33121/5 "2017-05-24T14:20:18Z")
> [@ScruffR](#):
>
> ble
Hi
I did your changes but I did received the same results.... you know why? thank'ssssss
sprintf(publishString,"{"tempeatureFresh": %1f, "temperatureFrozen": %.1f, "batt": %1f}",tempeatureFresh,temperatureFrozen,batt);
---
### Author:  [@ScruffR](https://community.particle.io/u/ScruffR)
#### Post date: [May 24, 2017, 2:33pm UTC](https://community.particle.io/t/publishing-several-fields-in-one-event/33121/6 "2017-05-24T14:33:29Z")
You left out the dot (`.`) in two cases to start with, but for more I’d have to look a bit closer - stay tuned.
* * *
_Update:_
How about this?
```cpp
FuelGauge fuel; // have this declarec globally only once
void loop() {
char msg[256]; // max length for publish, shorten to what's required
sensor.read();
double temperatureFresh = sensor.celsius();
Particle.publish("temperatureFresh", String(temperatureFresh), PRIVATE);
digitalWrite(D4, LOW);
delay(5000);
digitalWrite(D5, HIGH);
//Reading Temperature Frozen
sensor2.read();
double temperatureFrozen = sensor2.celsius();
Particle.publish("temperatureFrozen", String(temperatureFrozen), PRIVATE);
//Particle.publish("temperatureFrozen", String(sensor2.celsius()), PRIVATE);
digitalWrite(D5, LOW);
//Reading battery level
//FuelGauge fuel;
//float batt;
float batt = fuel.getVCell();
snprintf(msg, sizeof(msg), "{\"temperatureFresh\":%.1f,\"temperatureFrozen\":%.1f,\"batt\":%.1f}", temperatureFresh, temperatureFrozen, batt);
Particle.publish("UlaTracker_test", msg, PRIVATE);
}
```
---
### Author:  [@wgbartley](https://community.particle.io/u/wgbartley)
#### Post date: [May 24, 2017, 2:45pm UTC](https://community.particle.io/t/publishing-several-fields-in-one-event/33121/7 "2017-05-24T14:45:33Z")
Might want to change `tempeatureFresh` to `temperatureFresh`. Missing an “r” in the middle. 😉
---
### Author:  [@ScruffR](https://community.particle.io/u/ScruffR)
#### Post date: [May 24, 2017, 2:47pm UTC](https://community.particle.io/t/publishing-several-fields-in-one-event/33121/8 "2017-05-24T14:47:14Z")
Done, although that’s only optics as it was written that way at all instances 😉