https://github.com/chanthmiao/coolpi
a really simple automatic cooling program for the Raspberry Pi, written in C.
https://github.com/chanthmiao/coolpi
raspberry-pi-3b-plus wiringpi
Last synced: 15 days ago
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a really simple automatic cooling program for the Raspberry Pi, written in C.
- Host: GitHub
- URL: https://github.com/chanthmiao/coolpi
- Owner: ChanthMiao
- License: mit
- Created: 2019-03-16T16:03:25.000Z (about 6 years ago)
- Default Branch: master
- Last Pushed: 2019-05-22T16:15:14.000Z (almost 6 years ago)
- Last Synced: 2025-04-13T04:04:56.181Z (15 days ago)
- Topics: raspberry-pi-3b-plus, wiringpi
- Language: C
- Size: 66.4 KB
- Stars: 6
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# coolpi
a really simple cooling program for the Raspberry Pi, written in C.
## Dependence
This program is base on wiringPi. Before your trying to build it, do check the installation of wiringPi with the command below.
```bash
gpio -v
```
If everything is fine, you are likely to see the message below.
```bash
gpio version: 2.46
Copyright (c) 2012-2018 Gordon Henderson
This is free software with ABSOLUTELY NO WARRANTY.
For details type: gpio -warranty
Raspberry Pi Details:
Type: Pi 3+, Revision: 03, Memory: 1024MB, Maker: Sony
* Device tree is enabled.
*--> Raspberry Pi 3 Model B Plus Rev 1.3
* This Raspberry Pi supports user-level GPIO access.
```
## Hardware
### Pin Number
| BCM | WiringPi | Name | Phys | ical | Name | WiringPi | BCM |
| :---: | :------: | :-----: | :---: | :---: | :-----: | :------: | :---: |
| | | 3.3v | 1 | 2 | 5v | | |
| 2 | 8 | SDA.1 | 3 | 4 | 5v | | |
| 3 | 9 | SCL.1 | 5 | 6 | 0v | | |
| 4 | 7 | GPIO. 7 | 7 | 8 | TxD | 15 | 14 |
| | | 0v | 9 | 10 | RxD | 16 | 15 |
| 17 | 0 | GPIO. 0 | 11 | 12 | GPIO. 1 | 1 | 18 |
| 27 | 2 | GPIO. 2 | 13 | 14 | 0v | | |
| 22 | 3 | GPIO. 3 | 15 | 16 | GPIO. 4 | 4 | 23 |
| | | 3.3v | 17 | 18 | GPIO. 5 | 5 | 24 |
| 10 | 12 | MOSI | 19 | 20 | 0v | | |
| 9 | 13 | MISO | 21 | 22 | GPIO. 6 | 6 | 25 |
| 11 | 14 | SCLK | 23 | 24 | CE0 | 10 | 8 |
| | | 0v | 25 | 26 | CE1 | 11 | 7 |
| 0 | 30 | SDA.0 | 27 | 28 | SCL.0 | 31 | 1 |
| 5 | 21 | GPIO.21 | 29 | 30 | 0v | | |
| 6 | 22 | GPIO.22 | 31 | 32 | GPIO.26 | 26 | 12 |
| 13 | 23 | GPIO.23 | 33 | 34 | 0v | | |
| 19 | 24 | GPIO.24 | 35 | 36 | GPIO.27 | 27 | 16 |
| 26 | 25 | GPIO.25 | 37 | 38 | GPIO.28 | 28 | 20 |
| | | | 39 | 40 | GPIO.29 | 29 | 21 |
### Wiring
**The default wiringPi pin that connected to the base of transistor is 4, you can custom it by write your own configure file.**
## Build && install
Easy with a few commad:
```bash
git clone https://github.com/ChanthMiao/coolpi.git
cd coolpi && make
sudo make install
```
## Usage
Well, now the the coolpi should be running as a linux daemon, if everything is ok. This program has maintain a set of defalut configure values that passed my personal test. Yet, you may offer a set of customed values through writting your own configure file.
*The comments is not supported in the configure file. I offer a sample named '/etc/coolpi/sample.json'.*
```json
{
"con": 4,
"upperLimit": 48000,
"onMsec": 20000,
"lowerLimit": 44000,
"offMsec": 2000,
"waitMsec": 1000
}
```
|option|what is it|
|:--:|:----|
|con|wiringPi pin that connected to the base of transistor|
|upperLimit|threshold for turning on the fan ($^\circ C$/k)|
|onMsec|continuous running time of the fan on (ms)|
|lowerLimit|threshold for turning on the fan ($^\circ C$/k)|
|offMsec|continuous waiting time of the fan off (ms)|
|waitMsec|continuous waiting time of the fan when the temperature is in the middle segment (ms)|
Then, modify the line 8 of '/lib/systemd/system/coolpi.service' to the content blow:
```bash
ExecStart=/usr/local/bin/coolpi -c /etc/coolpi/$YOUR_CONFIGURE
```
Reload the '/lib/systemd/system/coolpi.service' with command here:
```bash
sudo systemctl daemon-reload
```
All thing done, have fun with you raspberry Pi 3B+ !
## Note
- If you want to uninstall the coolpi, just one command is needed.
```bash
sudo /etc/coolpi/uninstall.sh
```
- Only after your modification of '/lib/systemd/system/coolpi.service', the command "`sudo systemctl daemon-reload`" is needed. If you just want reload your customed configure file, do run the command blow:
```bash
sudo systemctl reload coolpi.service
```