Added to Heltec board display code logic to reduce corruption of messages on the display
Two piece of defensive code were added
- Only display messages to the display when operating on Core 1 ( Default Arduino ESP32 CONFIG_ARDUINO_RUNNING_CORE )
- Only display one character/string at a time
In the event of failure, default to Serial output.
PS SSD1306 driver similar issues
https://github.com/ThingPulse/esp8266-oled-ssd1306/issues/326https://github.com/ThingPulse/esp8266-oled-ssd1306/issues/352