# Two temperature sensors DS18B20 on the nodemcu v3

**URL:** https://forum.sensor.community/t/two-temperature-sensors-ds18b20-on-the-nodemcu-v3/538
**Category:** Feature Requests
**Created:** [April 20, 2021, 12:51pm UTC](https://forum.sensor.community/t/two-temperature-sensors-ds18b20-on-the-nodemcu-v3/538 "2021-04-20T12:51:18Z")
**Posts on this page:** 7
**Page:** 1

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### Author: ![awesterhoff](https://forum.sensor.community/user_avatar/forum.sensor.community/awesterhoff/32/295_2.png) [@awesterhoff](https://forum.sensor.community/u/awesterhoff)
#### Post date: [April 20, 2021, 12:51pm UTC](https://forum.sensor.community/t/two-temperature-sensors-ds18b20-on-the-nodemcu-v3/538/1 "2021-04-20T12:51:18Z")

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Hi!

I was wondering if it would be possible to have the possibility to connect to temperature sensors DS18B20 on the nodemcu V3 firmware.

Best regards,

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### Author: ![pjg](https://forum.sensor.community/user_avatar/forum.sensor.community/pjg/32/194_2.png) [@pjg](https://forum.sensor.community/u/pjg)
#### Post date: [April 20, 2021, 2:42pm UTC](https://forum.sensor.community/t/two-temperature-sensors-ds18b20-on-the-nodemcu-v3/538/2 "2021-04-20T14:42:53Z")

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![Capture d’écran 2021-04-20 à 16.39.36](https://forum.sensor.community/uploads/default/original/1X/56c414c1ace1429f558be0b60fa4c1b7a88584d9.png)

@irukard How it works ?

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### Author: ![irukard](https://forum.sensor.community/user_avatar/forum.sensor.community/irukard/32/12_2.png) [@irukard](https://forum.sensor.community/u/irukard)
#### Post date: [April 20, 2021, 5:43pm UTC](https://forum.sensor.community/t/two-temperature-sensors-ds18b20-on-the-nodemcu-v3/538/3 "2021-04-20T17:43:01Z")

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OneWire. Every sensor has unique address.

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<div class="post-metadata">

### Author: ![awesterhoff](https://forum.sensor.community/user_avatar/forum.sensor.community/awesterhoff/32/295_2.png) [@awesterhoff](https://forum.sensor.community/u/awesterhoff)
#### Post date: [April 20, 2021, 7:01pm UTC](https://forum.sensor.community/t/two-temperature-sensors-ds18b20-on-the-nodemcu-v3/538/4 "2021-04-20T19:01:46Z")

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I tried but I didn’t receive the data from the second temperature sensor in the firmware I use for the luftdaten air sensor nodemcu v3

Should this work, did I make a mistake?

Regards Arjan

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### Author: ![irukard](https://forum.sensor.community/user_avatar/forum.sensor.community/irukard/32/12_2.png) [@irukard](https://forum.sensor.community/u/irukard)
#### Post date: [April 21, 2021, 1:12pm UTC](https://forum.sensor.community/t/two-temperature-sensors-ds18b20-on-the-nodemcu-v3/538/5 "2021-04-21T13:12:41Z")

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I don’t think multiple sensors are supported by firmware.

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### Author: ![pjg](https://forum.sensor.community/user_avatar/forum.sensor.community/pjg/32/194_2.png) [@pjg](https://forum.sensor.community/u/pjg)
#### Post date: [April 21, 2021, 3:22pm UTC](https://forum.sensor.community/t/two-temperature-sensors-ds18b20-on-the-nodemcu-v3/538/6 "2021-04-21T15:22:55Z")

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You will have to modify the firmware to set the second adress or to switch between the 2 addresses.

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<div class="post-metadata">

### Author: ![awesterhoff](https://forum.sensor.community/user_avatar/forum.sensor.community/awesterhoff/32/295_2.png) [@awesterhoff](https://forum.sensor.community/u/awesterhoff)
#### Post date: [May 20, 2021, 7:18pm UTC](https://forum.sensor.community/t/two-temperature-sensors-ds18b20-on-the-nodemcu-v3/538/7 "2021-05-20T19:18:19Z")

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Hi PJG,

Question would be: how ? 😉