tcp2leds

Control your WS2812 led strips through network

see homeassistant_energy.py and README section HomeAssistant examples

How it works

connect your WS2812 led strip to your rapsberry pi (act as server), see wiring
run python3 tcp2leds.py on your rapsberry pi as user root (sudo python3 tcp2leds.py)
run your python script (or one from the examples) on the raspberry pi or other other network connected device (act as client)
enjoy

Wiring the server

with external power supply

i.e. 40W 5V 8A power suppy MeanWell, LPV-60-24
connect + (red) and - (black) from your external power supply with the shorter two wires + (red) and - (white) of your led strip
connect the longer - (white) of your led strip with the GND of your raspberry pi
connect the data (green) wire of your led strip with the PWN pin of your raspberry pi
don't connect + with the raspberry pi! Only two wires go from the raspberry pi to the led strip!
power up external power supply
power up raspberry pi with USB-C

without external power suppy (power supply via raspberry pi)

connect the longer +, - and data wires of your led strip with your raspberry pi
power up raspberry pi with USB-C

Install server libraries

sudo apt-get update
sudo apt-get install gcc make build-essential python-dev git scons swig
sudo nano /etc/modprobe.d/raspi-blacklist.conf

Add line:

blacklist snd_bcm2835

sudo nano /boot/config.txt

Add comment/remove:

#dtparam=audio=on

Reboot:

sudo reboot

Install rpi_ws281x

cd ~/src/
git clone https://github.com/jgarff/rpi_ws281x
cd rpi_ws281x/
sudo scons

Protocol

Each char represents a color of a led:

i.e. if you want to control the first 10 leds of your light strip, send

'rrrgggyyyi'
 rrr = led 1-3 red
    ggg = led 4-6 green
       yyy = led = 7-9 yellow
          i = led 10 iris

Possible color values:

- dont set value, skips this led (keeps previous set value)
0 off
y yellow
a amber
r red
b blue
r red
g green
o brown
p purple
i iris
p orange

Feel free to contribute more color values.

HomeAssistant examples

#!/usr/bin/python
# -*- coding: utf-8 -*-
import tcp2leds
import time
from tcp2leds.homeassistant import HomeAssistantPowerSection, \
    HomeAssistantPowerSOCSection
ltt = '<HomeAssistant Long-Time Token>'
hass_url = 'http://192.168.178.203:8123'
watt_per_led = 100
p = tcp2leds.LEDProgram('192.168.178.100', used_leds=140)
s1 = HomeAssistantPowerSection(
    'grid',
    hass_url,
    ltt,
    'sensor.powerfox_aktuell',
    value_per_led=watt_per_led,
    stage_colors=['b', 'y', 'r'],
    )
s2 = HomeAssistantPowerSOCSection(
    'battery',
    hass_url,
    ltt,
    'sensor.albXXXXXXXX_instantaneous_battery_i_o',
    value_per_led=watt_per_led,
    stage_colors=['p', 'i', 'r'],
    soc_entity_id='sensor.albXXXXXXXX_instantaneous_battery_soc',
    )
s3 = HomeAssistantPowerSection(
    'helper_sum_pv',
    hass_url,
    ltt,
    'sensor.helper_pv_sum_yaml',
    value_per_led=watt_per_led,
    stage_colors=['y', 'n', 'r'],
    )
s4 = HomeAssistantPowerSection(
    'helper_verbrauch_haus',
    hass_url,
    ltt,
    'sensor.helper_verbrauch_haus_yaml',
    value_per_led=watt_per_led,
    stage_colors=['o', 'a', 'r'],
    )
p.add_section(s1)
p.add_section(s2)
p.add_section(s3)
p.add_section(s4)
p.push_loop(update_sec=0.05)

ckarrie/tcp2leds