Plugin not working with Firmware 4.02.11T.zj0.1

[scobby]

Hello Everyone,

bought 3x times a wifi370 but they have Firmware 4.02.11T.zj0.1 and that wont work with the standard protocol or i didnt get it running.

I already got some of the commands from wireshark, but i am stuck with the color selection. In theory i know which brackets are for each color. But there is also a fourth bracket with a matching code. I dont know the formula to get each color combination to work. maybe someone have an idea. I attached a file with all combinations i got from wireshark (not complete).

R is RED, G is GREEN, B is BLUE and X is the unknown factor ... Already sorted and calculated to integer 0-255. cleaned_up_sorted.txt

Example for Color: 31 RED GREEN BLUE 00 00 0f MATCHING CODE other codes:

ON: 71 23 0f a3

OFF: 71 24 0f a4

RED: 31 fe 00 00 00 00 0f 3e

GREEN: 31 00 fe 00 00 00 0f 3e

BLUE: 31 00 00 fe 00 00 0f 3e

YELLOW: 31 fe ff 00 00 00 0f 3d PINK: 31 fe 00 ff 00 00 0f 3d

SMOOTH COLOR FADING: 61 25 10 0f a5

[mwittig]

If you can read perl code have a look at WifiLight for FHEM. The command sequences you have sniffed match the LD382 device in their code https://github.com/herrmannj/wifilight/blob/master/FHEM/32_WifiLight.pm (May be check also FHEM source for newer version as code should be part of FHEM code base now). Search for WifiLight_RGBWLD382_Checksum - may be it is applicable for your case. If you need help on understanding this perl mumbo jumbo we can collaborate on this. I think it would be nice to support more variants of these cheapo LED devices :) I have also found some JS code but it does not look right to me https://github.com/psi-4ward/ld382.js/blob/master/lib/index.js

sub
WifiLight_RGBWLD382_Checksum(@)
{
  my ($ledDevice, $msg) = @_;
  my $c = 0;
  foreach my $w (split //, $msg)
  {
    $c += ord($w);
  }
  $c %= 0x100;
  $msg .= sprintf("%c", $c);
  return $msg;
}

[scobby]

that looks good, but i cant read perl that good to transform that to my bash script ;-) Also i would love to see that directly in the pimatic-led-light. Currently i develop all my addons for pimatic in bash ;-) its the fastest way for me.

[scobby]

ok have found a way to create the checksum:

sum all parts of the HEX COMMAND in decimal without the checksum and modulo % 256 After that convert to HEX

example: 31 fe 00 00 00 00 0f 3e

CHECKSUM is = 3e (62)

HEX = DECIMAL

31 = 49 fe = 254 00 = 0 00 = 0 00 = 0 0f = 15 SUM = 318

MODULO = SUM % 256

318 modulo 256 = 62

and 62 in hex is 3e

ready!

can anyone add this to the plugin?

[mwittig]

Yes, I'll have look.

[scobby]

any progress with this? need help?

[scobby]

@mwittig can you implement that fix for wifi370? my bash script doesnt have a backchannel, so the lights always resets in the pimatic installation. Would be fine if this would work with the default pimatic-led-light. If you need any tester, i am here to test the fix!