# pi4-cputempd

**Repository Path**: mirrors_samveen/pi4-cputempd

## Basic Information

- **Project Name**: pi4-cputempd
- **Description**: A small temperature logger for my raspberry pi 4
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-09-25
- **Last Updated**: 2025-10-20

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

## Temperature Logger Daemon For My Raspberry Pi 4

I wanted to test how the cheap heat-sinks I got for my Raspberry Pi 4 performed,
especially when in the official case versus the same without the cover. For that
I wanted to first log the CPU temperature somewhere. While writing the bash
script to log it, I thought of using some pre-built tools (like collectd,statsd
etc.) which are in abundance. However, a quick 5 minute search showed me that
all the available tools were extreme overkill. However, seeing that most tools
were daemons, I decided to write up a quick binary that would run as a systemd
unit (a simple one) and log the temperature to the journal. This is the result.

# Building And Running

- Install `gcc`
- Run `make`
- Install the binary to `/usr/local/bin`
- Install the service unit into `/etc/systemd/system`
- Enable the unit with `systemctl enable`
- Start up the service with `systemctl start`

# Checking The Output

The service logs for the unit contain the temperature data. It can be seen with
- `journalctl -u pi-cputempd`


# Test Environment

This is running on Ubuntu Focal Fossa 20.04.1 installed on my Raspberry Pi 4B
with 2GB memory (H/W rev 1.2).

# License
This code is released under the `HIRE ME/PAY ME` License (a modified 2 Clause BSD
License). Please see the LICENSE file for details.

# ToDo

- Enable parameter passing (sleep delay, location of the temperature file in sysfs).
- Create a deb control file to create a package.
- Test in  distributions of the RedHat lineage and spec file for packages for
  them.