I am having a problem uploading code to a Feather Huzzah Esp8266. This code has been uploaded in the past with no issues. I think the issue is with the Adafruit Si7021 code sonce its the last thing to compile before it crashes with the error. I have pasted the error below.
Arduino: 1.8.13 (Windows 10), Board: "Adafruit Feather HUZZAH ESP8266, 80 MHz, Flash, Legacy (new can return nullptr), All SSL ciphers (most compatible), 4MB (FS:2MB OTA:~1019KB), v2 Lower Memory, Disabled, None, Only Sketch, 115200" ... Using board 'huzzah' from platform in folder: C:\Users\USERNAME\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4 Using core 'esp8266' from platform in folder: C:\Users\USERNAME\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4 Detecting libraries used... ... Alternatives for Adafruit_MQTT.h: [Adafruit_MQTT_Libraryemail@example.com Adafruit_MQTT_Library@2.1.0] ResolveLibrary(Adafruit_MQTT.h) -> candidates: [Adafruit_MQTT_Libraryfirstname.lastname@example.org Adafruit_MQTT_Library@2.1.0] ... Multiple libraries were found for "ArduinoHttpClient.h" Used: C:\Users\USERNAME\Arduino\Arduino\libraries\ArduinoHttpClient Not used: C:\Users\USERNAME\Arduino\Arduino\libraries\ArduinoHttpClient-master Multiple libraries were found for "Adafruit_MQTT.h" Used: C:\Users\USERNAME\Arduino\Arduino\libraries\Adafruit_MQTT_Library Not used: C:\Users\USERNAME\Arduino\Arduino\libraries\Adafruit_MQTT_Library-1.0.3 Multiple libraries were found for "WiFi.h" Used: C:\Program Files (x86)\Arduino\libraries\WiFi Not used: C:\Users\USERNAME\Arduino\Arduino\libraries\WiFiNINA Using library Adafruit_MQTT_Library at version 2.1.0 in folder: C:\Users\USERNAME\Arduino\Arduino\libraries\Adafruit_MQTT_Library Using library Adafruit_IO_Arduino at version 4.0.2 in folder: C:\Users\USERNAME\Arduino\Arduino\libraries\Adafruit_IO_Arduino Using library ArduinoHttpClient at version 0.4.0 in folder: C:\Users\USERNAME\Arduino\Arduino\libraries\ArduinoHttpClient Using library ESP8266WiFi at version 1.0 in folder: C:\Users\USERNAME\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\libraries\ESP8266WiFi Using library WiFi at version 1.2.7 in folder: C:\Program Files (x86)\Arduino\libraries\WiFi Using library Adafruit_SGP30_Sensor at version 2.0.0 in folder: C:\Users\USERNAME\Arduino\Arduino\libraries\Adafruit_SGP30_Sensor Using library Adafruit_BusIO at version 1.7.1 in folder: C:\Users\USERNAME\Arduino\Arduino\libraries\Adafruit_BusIO Using library Wire at version 1.0 in folder: C:\Users\USERNAME\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\libraries\Wire Using library SPI at version 1.0 in folder: C:\Users\USERNAME\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\libraries\SPI Using library Adafruit_Si7021_Library at version 1.4.0 in folder: C:\Users\USERNAME\Arduino\Arduino\libraries\Adafruit_Si7021_Library exit status 1 Error compiling for board Adafruit Feather HUZZAH ESP8266.