# Temperature Monitoring with 4 Sensors

**URL:** <https://forum.core-electronics.com.au/t/temperature-monitoring-with-4-sensors/10441>\
**Category:** Finding Parts\
**Created:** [15 June 2021 01:41 UTC](https://forum.core-electronics.com.au/t/temperature-monitoring-with-4-sensors/10441 "2021-06-15T01:41:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Huseyin166152](https://avatars.discourse-cdn.com/v4/letter/h/8baadc/32.png) [@Huseyin166152](https://forum.core-electronics.com.au/u/Huseyin166152)\
**Post date:** [15 June 2021 01:41 UTC](https://forum.core-electronics.com.au/t/temperature-monitoring-with-4-sensors/10441/1 "2021-06-15T01:41:16Z")

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Like I want some cost-effective temperature monitor system in place for small business: So I’m about to hire a code from Upwork for the python script. I would like to monitor the temperatures of the following,

- Freezer (temperature= will be minus 18c range) +
- Coolroom (temperature= will be 2c range)
- Blast freezer (temperature= will be minus 40c range)
- Production room (temperature= will be 6c range)

Where there is 5-10metres apart from each other so I help with this, so I have two options I think

1. Have one raspberry pi zero and connect all the sensors.
2. Have a separate raspberry pi zero for each sensor

\*\*\*Note I will be connecting the raspberry zero to the internet via ethernet cable with micro usb to rj45 ethernet adapter. due to the poor connectivity issues on place,

Would be great to get your guy’s feedback regarding this project

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**Author:** ![James](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/james/32/4400_2.png) [@James](https://forum.core-electronics.com.au/u/James)\
**Post date:** [15 June 2021 02:33 UTC](https://forum.core-electronics.com.au/t/temperature-monitoring-with-4-sensors/10441/2 "2021-06-15T02:33:40Z")

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Hi Huseyin,

I’ve done exactly this in my house! You can use 1-Wire devices like the DS18B20 temperature sensor in this instance:

> **[Temperature Sensor - Waterproof (DS18B20)](https://core-electronics.com.au/temperature-sensor-waterproof-ds18b20.html)**
>
> This sealed digital temperature probe lets you precisely measure temperatures in wet environments with a simple 1-Wire interface. The DS18B20 provides 9 to 12-bit (configurable) temperature readings over a 1-Wire interface, so that only one wire (and...

Make sure you’re enabling 1-Wire through raspi-config  
Just make sure you’re using a cable with twisted pairs and preferrably shielding, as 1-Wire is a bit tempremental.  
You could consider using RJ45 breakouts:

> **[Breakout Board for RJ45](https://core-electronics.com.au/breakout-board-for-rj45.html)**
>
> RJ45 connectors are the kind that are used for Ethernet jacks, but they make great general purpose connectors when you need a lot of conductors. This is a small PCB that brings out the pins of the RJ45 connector to an in-line 0.1

I could share my code for logging and displaying the temperatures if you like? (It’ll have to wait until later today)  
-James

P.S., look at this guide on long 1-Wire networks:  
[https://www.maximintegrated.com/en/design/technical-documents/tutorials/1/148.html](https://www.maximintegrated.com/en/design/technical-documents/tutorials/1/148.html)

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<div class="post-metadata">

**Author:** ![Huseyin166152](https://avatars.discourse-cdn.com/v4/letter/h/8baadc/32.png) [@Huseyin166152](https://forum.core-electronics.com.au/u/Huseyin166152)\
**Post date:** [15 June 2021 04:20 UTC](https://forum.core-electronics.com.au/t/temperature-monitoring-with-4-sensors/10441/3 "2021-06-15T04:20:22Z")

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@James Thanks for the reply.

So did you have one rasp-pi zero or one r-pi for each sensor?

I’m a newbie on this stuff, it will be great to see your project visually. Also, it will be great to see your code for this project.