# Sensirion Particle, VOC, Humidity, and Temperature Sensor - SEN55 (SEN-23715)

**URL:** <https://forum.core-electronics.com.au/t/sensirion-particle-voc-humidity-and-temperature-sensor-sen55-sen-23715/24072>\
**Category:** Product Questions\
**Created:** [22 March 2026 00:18 UTC](https://forum.core-electronics.com.au/t/sensirion-particle-voc-humidity-and-temperature-sensor-sen55-sen-23715/24072 "2026-03-22T00:18:17Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Core](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/core/32/57_2.png) [@Core](https://forum.core-electronics.com.au/u/Core)\
**Post date:** [22 March 2026 00:18 UTC](https://forum.core-electronics.com.au/t/sensirion-particle-voc-humidity-and-temperature-sensor-sen55-sen-23715/24072/1 "2026-03-22T00:18:17Z")

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This is a placeholder topic for [**“Sensirion Particle, VOC, Humidity, and Temperature Sensor - SEN55”**](https://core-electronics.com.au/sensirion-particle-voc-humidity-and-temperature-sensor-sen55.html) comments.

![](https://core-electronics.com.au/media/catalog/product/cache/5ba536955e3e815f4e908e49c1dd8155/S/E/SEN-23715-1.jpg)

The SEN55 environmental node is a straightforward, all-in-one sensor solution platform for the accurate measurement of various environmental parameters…

[**Read more**](https://core-electronics.com.au/sensirion-particle-voc-humidity-and-temperature-sensor-sen55.html)

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<div class="post-metadata">

**Author:** ![Mark285907](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Mark285907](https://forum.core-electronics.com.au/u/Mark285907)\
**Post date:** [22 March 2026 00:18 UTC](https://forum.core-electronics.com.au/t/sensirion-particle-voc-humidity-and-temperature-sensor-sen55-sen-23715/24072/2 "2026-03-22T00:18:38Z")

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Hi Core.

I recently purchased a SEN55. The fan does not run when powered nor is there any IC2 comms. I suspect the sensor is faulty.

To be fair I may have cooked it as the colour coding used on the leads is odd. Pin 1 VCC is green and pin 2 GND is blue.

Thoughts?

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<div class="post-metadata">

**Author:** ![Mark285907](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Mark285907](https://forum.core-electronics.com.au/u/Mark285907)\
**Post date:** [22 March 2026 06:26 UTC](https://forum.core-electronics.com.au/t/sensirion-particle-voc-humidity-and-temperature-sensor-sen55-sen-23715/24072/3 "2026-03-22T06:26:47Z")

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T’was the Zero!

Reconnected to the Pi 5, activated the VE, installed the driver, ran the code and…..

```auto
>>> %Run sen55.py
Version: Firmware 2.0, Hardware 5.0, Protocol 1.0
Product Name: SEN55
Serial Number: A66AC168CD8F803B
Waiting for new data...
Mass Concentration PM1.0: 0.0 µg/m^3
Mass Concentration PM2.5: 0.0 µg/m^3
Mass Concentration PM4.0: 0.0 µg/m^3
Mass Concentration PM10.0: 0.0 µg/m^3
Ambient Humidity: 62.27 %RH
Ambient Temperature: 27.50 °C
VOC Index: 0.0
NOx Index: N/A
Device Status: 0x00000000 [OK]

Waiting for new data...
Mass Concentration PM1.0: 0.0 µg/m^3
Mass Concentration PM2.5: 0.0 µg/m^3
Mass Concentration PM4.0: 0.0 µg/m^3
Mass Concentration PM10.0: 0.0 µg/m^3
Ambient Humidity: 62.27 %RH
Ambient Temperature: 27.50 °C
VOC Index: 0.0
NOx Index: N/A
Device Status: 0x00000000 [OK]

Waiting for new data...
Mass Concentration PM1.0: 2.4 µg/m^3
Mass Concentration PM2.5: 6.9 µg/m^3
Mass Concentration PM4.0: 10.5 µg/m^3
Mass Concentration PM10.0: 12.4 µg/m^3
Ambient Humidity: 62.26 %RH
Ambient Temperature: 27.50 °C
VOC Index: 0.0
NOx Index: N/A
Device Status: 0x00000000 [OK]

Waiting for new data...
Mass Concentration PM1.0: 2.5 µg/m^3
Mass Concentration PM2.5: 6.5 µg/m^3
Mass Concentration PM4.0: 9.7 µg/m^3
Mass Concentration PM10.0: 11.3 µg/m^3
Ambient Humidity: 62.25 %RH
Ambient Temperature: 27.50 °C
VOC Index: 0.0
NOx Index: N/A
Device Status: 0x00000000 [OK]

```