* PSRAM_Allocator was missing the "reallocate" method, which lead to undefined behaviour when dynamic JSON doc needed to grow/shrink
* Segment::setUpLeds() quickfix for length() == 0 (should not happen, but it did happen for me once)
* leds in PSRAM causes major slowdown on wrover boards - disabled.
* prevent string buffer overflows (stack corruption)
* avoid division by zero (program might crash)
* avoid log(0) which is undefined, too
* use faster math routines for float (logf, powf)
* customMappingTable: allocate using calloc instead of new (new will throw exception if nor enough heap)
* fixing a few minor memory leaks
* ws.cpp: catch out-of-memory in sendLiveLedsWs
* ws.cpp: change interval to 80ms (120 ws very slow...)
index.js:
- add callNode
- populateNodes more info and button calling node
remove fetchAndExecute from artifx.js (use the one in index.js) and add parms parameter
index.css: make #nodes div 980px wide
* UM BH1750 adjustments to use new MM features
* UM BH1750 check sensor status before tryig to read new value (avoids blocking LED updates)
* UM temperature: ensure that measurements continue with many LEDs running (strip.isUpdating() will be true all the time)
* all usermods: solved compile problems on 8266
Use MM specific features in SHT usermod:
* Join global I2C bus with pinManager.joinWire()
* allow to compile without MQTT
* use extended Usermod class features
* prevent sensor starvation when running with > 600 LEDs
* use size_t instead of uint16_t -> prevents random behaviour (corruption) in case that JSON files get larger than 64Kbytes.
* use a constant for max large file space (was UINT16_MAX)
* reduced the scope of some functions and variables to "static" - avoids name clashes and may support better optimization by the compiler
* FastLED 3.5.0 #master (up to 50% faster)
* All ESP32 env use NeoPixelBus 2.7.3 (slightly faster)
* Weather usermod: small update, as fastLED wants an explicit conversion from CRGB -> uint32_t
* weather usermod: avoid using palette color #0 = black
