Hi Paul, I can't post the code since it's not mine...any idea to let arduino ide meet properly memos? 
here you find the error compiling with arduino 1.8.4 and esp board manager 2.3.0.
Arduino: 1.8.4 (Mac OS X), Board: "WeMos D1 R2 & mini, 80 MHz, 921600, 4M (3M SPIFFS)"
/private/var/folders/xx/35_zsv252q1dbrp8rzf2s91h0000gp/T/AppTranslocation/5B0C121B-341A-436A-9286-028AB2E65451/d/Arduino.app/Contents/Java/arduino-builder -dump-prefs -logger=machine -hardware /private/var/folders/xx/35_zsv252q1dbrp8rzf2s91h0000gp/T/AppTranslocation/5B0C121B-341A-436A-9286-028AB2E65451/d/Arduino.app/Contents/Java/hardware -hardware /Users/alessandrobarbiero/Library/Arduino15/packages -tools /private/var/folders/xx/35_zsv252q1dbrp8rzf2s91h0000gp/T/AppTranslocation/5B0C121B-341A-436A-9286-028AB2E65451/d/Arduino.app/Contents/Java/tools-builder -tools /private/var/folders/xx/35_zsv252q1dbrp8rzf2s91h0000gp/T/AppTranslocation/5B0C121B-341A-436A-9286-028AB2E65451/d/Arduino.app/Contents/Java/hardware/tools/avr -tools /Users/alessandrobarbiero/Library/Arduino15/packages -built-in-libraries /private/var/folders/xx/35_zsv252q1dbrp8rzf2s91h0000gp/T/AppTranslocation/5B0C121B-341A-436A-9286-028AB2E65451/d/Arduino.app/Contents/Java/libraries -libraries /Users/alessandrobarbiero/Documents/Arduino/libraries -fqbn=esp8266:esp8266:d1_mini:CpuFrequency=80,UploadSpeed=921600,FlashSize=4M3M -ide-version=10804 -build-path /var/folders/xx/35_zsv252q1dbrp8rzf2s91h0000gp/T/arduino_build_7952 -warnings=none -build-cache /var/folders/xx/35_zsv252q1dbrp8rzf2s91h0000gp/T/arduino_cache_54831 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.xtensa-lx106-elf-gcc.path=/Users/alessandrobarbiero/Library/Arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/1.20.0-26-gb404fb9-2 -prefs=runtime.tools.mkspiffs.path=/Users/alessandrobarbiero/Library/Arduino15/packages/esp8266/tools/mkspiffs/0.1.2 -prefs=runtime.tools.esptool.path=/Users/alessandrobarbiero/Library/Arduino15/packages/esp8266/tools/esptool/0.4.9 -verbose /Users/alessandrobarbiero/Documents/design & art/FABLAB/Progetti /Teepee/Esp_Teepee/Esp_Teepee.ino
Board d1_mini (platform esp8266, package esp8266) is unknown
Error compiling for board WeMos D1 R2 & mini.