Upload to ATTiny167 fails

[hcccs]

Uploading to an ATTiny167 fails with "Could not find USBtiny device (0x1781/0xc9f)". It doesn't prompt for a device connect.

Processing attiny167 (platform: atmelavr; board: attiny167; framework: arduino) -----------------------Verbose mode can be enabled via-v, --verbose` option CONFIGURATION: https://docs.platformio.org/page/boards/atmelavr/attiny167.html PLATFORM: Atmel AVR (3.4.0) > Generic ATtiny167 HARDWARE: ATTINY167 8MHz, 512B RAM, 16KB Flash PACKAGES:

• framework-arduino-avr-attiny 1.5.2
• tool-avrdude 1.60300.200527 (6.3.0)
• toolchain-atmelavr 1.70300.191015 (7.3.0) LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf LDF Modes: Finder ~ chain, Compatibility ~ soft Found 14 compatible libraries Scanning dependencies... Dependency Graph |-- <Adafruit SSD1306> 2.5.1 | |-- <Adafruit GFX Library> 1.10.13 | | |-- <Adafruit BusIO> 1.11.2 | | | |-- <Wire> 2.0.0 | | | |-- <SPI> 2.0.0 | | |-- <SPI> 2.0.0 | | |-- <Wire> 2.0.0 | |-- <SPI> 2.0.0 | |-- <Wire> 2.0.0 |-- <Adafruit GFX Library> 1.10.13 | |-- <Adafruit BusIO> 1.11.2 | | |-- <Wire> 2.0.0 | | |-- <SPI> 2.0.0 | |-- <SPI> 2.0.0 | |-- <Wire> 2.0.0 |-- <Adafruit BusIO> 1.11.2 | |-- <Wire> 2.0.0 | |-- <SPI> 2.0.0 |-- <OneWire> 2.3.6 |-- <DallasTemperature> 3.9.1 | |-- <OneWire> 2.3.6 Building in release mode Checking size .pio\build\attiny167\firmware.elf Advanced Memory Usage is available via "PlatformIO Home > Project Inspect" RAM: [===== ] 49.8% (used 255 bytes from 512 bytes) Flash: [======== ] 84.8% (used 13886 bytes from 16384 bytes) Configuring upload protocol... AVAILABLE: usbtiny CURRENT: upload_protocol = usbtiny Looking for upload port... Uploading .pio\build\attiny167\firmware.hex avrdude: Error: Could not find USBtiny device (0x1781/0xc9f)

avrdude done. Thank you.

*** [upload] Error 1 =============================== [FAILED] Took 5.75 seconds ====== `

[hcccs]

I added "upload_protocol = micronucleus" to platformio.ini and the upload was successful but when I connect the ATTiny167 to the USB port it disconnects after 3 seconds.

[Fusseldieb]

upload_protocol = micronucleus

This fixed the upload issue on my ATtiny85.