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pietmacom/waveshare-poe-hat-b-cli

By pietmacom

•Updated over 3 years ago

Small CLI (command line interface) for Waveshare PoE HAT B with OLED Display.

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pietmacom/waveshare-poe-hat-b-cli repository overview

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⁠Waveshare PoE HAT CLI (Command Line Interface)

Small command line interface for Waveshare PoE HAT B with OLED Display.

doc/PoE-HAT-B-details-5.png

Find this project on GitHub https://github.com/pietmacom/waveshare-poe-hat-b-cli⁠ and on DockerHub https://hub.docker.com/r/pietmacom/waveshare-poe-hat-b-cli⁠

⁠Features

  • Docker Image
  • Command line interface
    • Turn fan on and off
    • View up to four lines on your OLED Display (size and positions are adapted automatically)
  • Binary does not have to be recompiled to view different content
  • Almost no dependencies

⁠Docker

Run command

foo@bar:~$ docker run --privileged -it pietmacom/waveshare-poe-hat-b-cli /root/waveshare-poe-hat-b-cli oled "Hello World!"
foo@bar:~$ docker run --privileged -it pietmacom/waveshare-poe-hat-b-cli /root/waveshare-poe-hat-b-cli fan on

Run simple script simple.sh⁠

foo@bar:~$ docker run --privileged -it pietmacom/waveshare-poe-hat-b-cli

#!/bin/sh -e

_fanState="off"
_fanOnTemperature="40000"
_fanOffTemperature="35000"

while true; do
    _temperature="$(cat /sys/class/thermal/thermal_zone0/temp)"

    _temperatureViewAwk="BEGIN { printf \"%.2f C\", (${_temperature}/1000) }"
    _temperatureView=$(awk "${_temperatureViewAwk}";)

    if [[ "${_temperature}" -gt "${_fanOnTemperature}" ]]; then
        _fanState="on"
    elif [[ "${_temperature}" -lt "${_fanOffTemperature}" ]]; then
        _fanState="off"
    fi

    ./waveshare-poe-hat-b-cli fan ${_fanState}
    ./waveshare-poe-hat-b-cli oled "T: ${_temperatureView}" "F: ${_fanState}"
    sleep 3
done

doc/example-bash.png

Run your own script

Copy simple.sh⁠, make your changes and mount it into your new container.

foo@bar:~$ docker run --privileged -it -v yourscript.sh:/root/script.sh pietmacom/waveshare-poe-hat-b-cli

Docker Compose

version: '3'

services:
  waveshare-poe-hat-b-cli:
    image: pietmacom/waveshare-poe-hat-b-cli:latest
    privileged: true
    restart: "unless-stopped"

⁠Command Line (Shell)

⁠Control FAN
foo@bar:~$ sudo ./waveshare-poe-hat-b-cli fan on
Fan turned on!

foo@bar:~$ sudo ./waveshare-poe-hat-b-cli fan off
Fan turned off!
⁠Control OLED
foo@bar:~$ sudo ./waveshare-poe-hat-b-cli oled "row1"
row 1: row1

doc/example-1rows.png

foo@bar:~$ sudo ./waveshare-poe-hat-b-cli oled "row1" "row2"
row 1: row1
row 2: row2

doc/example-2rows.png

foo@bar:~$ sudo ./waveshare-poe-hat-b-cli oled "row1" "row2" "row3"
row 1: row1
row 2: row2
row 3: row3

doc/example-3rows.png

foo@bar:~$ sudo ./waveshare-poe-hat-b-cli oled "row1" "row2" "row3" "row4"
row 1: row1
row 2: row2
row 3: row3
row 4: row4

doc/example-4rows.png

⁠Enable I2C Interface

I2C interface is required for the OLED display, you need to first enable the i2c interface for properly work. Open a terminal of Raspberry Pi and configure:

foo@bar:~$ sudo raspi-config
Interfacing Options -> I2C -> Yes

doc/enable-i2c.png

And then reboot the system.

foo@bar:~$ sudo reboot

⁠Compile

foo@bar:~$ ./make clean
foo@bar:~$ ./make

⁠References

Documentation https://www.waveshare.com/wiki/PoE_HAT_(B)⁠

Tag summary

Content type

Image

Digest

sha256:5839ecd67…

Size

3 MB

Last updated

over 3 years ago

docker pull pietmacom/waveshare-poe-hat-b-cli