I have this set up and running like any other Tasmota device, MQTT connected and all that working fine. I have connected it to a confirmed WS2815 strip, but it only lights up white and about 1/2 way through a 5m strip. I'm using a 2A power supply at 12V ( 30 LEDs/m, 5m = 150LEDs, comes in at just under 2A required).
I have connected GND, 12V and DI correctly. I tried also connecting the backup data channel BI but no change in behaviour. After restarting about 10-15 more lights light up. They are all white, and the controls through the web interface seem to have no effect.
I have NFI what I'm doing, so I was looking for a getting started/basic instructions. I haven't changed any firmware from stock, and it all seems to be functioning normally. How do I set it to do some ARGB test patterns? Does it need to be specifically configured to be in ARGB Mode? I couldn't find that in the Tasmota web interface settings. GPIO19 isn't set to anything (stock, untouched settings) - does that need to be assigned to something, since it's the data pin by default?
Ok that seems to work, because the WS2812 and WS2815 data protocol is the same. I'm still only seeing 30 LEDs of the strip light up. If I restart the module several times, it will light up more of the strip, but only around 60 in total. Is there a way to tell the controller that I have 150 LEDs in the array? Is it supposed to detect the number of modules in the array automatically? I have two identical WS2815 strips that behave identically. This is very difficult without any kind of instruction manual/guide.