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-rw-r--r--makefu/2configs/deployment/led-fader/default.nix27
-rwxr-xr-xmakefu/2configs/deployment/led-fader/fade.py78
2 files changed, 105 insertions, 0 deletions
diff --git a/makefu/2configs/deployment/led-fader/default.nix b/makefu/2configs/deployment/led-fader/default.nix
new file mode 100644
index 000000000..fee741997
--- /dev/null
+++ b/makefu/2configs/deployment/led-fader/default.nix
@@ -0,0 +1,27 @@
+{ config, lib, pkgs, ... }:
+
+with import <stockholm/lib>;
+let
+ mq = "192.168.8.11";
+in {
+ systemd.services.led-fader = {
+ description = "Send led change to message queue";
+ environment = {
+ NIX_PATH = "/var/src";
+ };
+ wantedBy = [ "multi-user.target" ];
+ path = with pkgs; [
+ nix # nix-shell
+ mosquitto #mosquitto_pub
+ bash # nix-shell
+ ];
+ serviceConfig = {
+ # User = "nobody"; # need a user with permissions to run nix-shell
+ ExecStart = pkgs.writeDash "run-fader" ''
+ ${./fade.py} --add-empty --mode chain 3 loop --skip-unchanged 0.002 0.1 \
+ | mosquitto_pub -h ${mq} -p 1883 -l -t '/leds/nodemcu-switcher/set'
+ '';
+ PrivateTmp = true;
+ };
+ };
+}
diff --git a/makefu/2configs/deployment/led-fader/fade.py b/makefu/2configs/deployment/led-fader/fade.py
new file mode 100755
index 000000000..8178ad6e8
--- /dev/null
+++ b/makefu/2configs/deployment/led-fader/fade.py
@@ -0,0 +1,78 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i python3 -p python3 python35Packages.docopt
+""" usage: run [options] NUMLEDS (loop [--skip-unchanged] [STEP] [DELAY]|single STARTVAL)
+
+ --add-empty essentially add a single empty led in front, does not count into NUMLEDS
+
+ --mode=TYPE mode of fading (Default: chain)
+ --output=TYPE output type, either json or raw (Default: json)
+ --skip-unchanged if the value in the loop is unchanged, skip the output
+
+running with loop this script essentially becomes a generator which outputs the
+next value each "DELAY"
+single returns a single output with STARTVAL as starting point for the first led
+
+NUMLEDS is the number of leds to output data for (--add-empty does not count in here)
+STEP defaults to 0.01
+DELAY defaults to 1 second
+
+"""
+from docopt import docopt
+import time
+from colorsys import hsv_to_rgb
+import json
+import sys
+
+def calc_chain(numleds,val):
+ divisor = 1.0 / numleds
+ ret = []
+ for i in range(numleds):
+ v = float(divisor * i + val) % 1
+ r,g,b = hsv_to_rgb(v,0.9,1)
+ ret.append([int(r*255),
+ int(g*255),
+ int(b*255)])
+ return ret
+
+def calc_single(numleds,val):
+ ret = []
+ for i in range(numleds):
+ r,g,b = hsv_to_rgb(val,1,1)
+ ret.append([int(r*255),
+ int(g*255),
+ int(b*255)])
+ return ret
+
+def main():
+ args = docopt(__doc__)
+ numleds = int(args['NUMLEDS'])
+ mode = args['--mode']
+ step = float(args['STEP'] or 0.01)
+ delay = float(args['DELAY'] or 1)
+ val = float(args['STARTVAL'] or 0)
+ last = []
+ while True:
+ if mode == "chain":
+ ret = calc_chain(numleds,val)
+ elif mode == "single":
+ ret = calc_single(numleds,val)
+
+ if args['--add-empty']:
+ ret.insert(0,[0,0,0])
+
+ # early serialization makes comparsion easy
+ ret = json.dumps(ret)
+ if not (args['--skip-unchanged'] and last == ret):
+ last = ret
+ print(ret)
+ sys.stdout.flush()
+ if args['single']:
+ break
+ else:
+ val += step % 1
+ time.sleep(delay)
+
+
+
+if __name__ == "__main__":
+ main()