Toaster tutorial for tangleid and mender-dmeo

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create project
- add meta-layers
  - add layers in layerindex
    - meta-mender-core
    - meta-mender-demo
    - meta-mender-qemu
  - add layers in git repository
    - meta-tangleid
- config MACHINE
  - vexpress-qemu
- config IMAGE_FSTYPES
  - mender
  - sdimg
- config variable

variables for mender

Variable	value	remark
ARTIFACTIMG_FSTYPE	ext4
DISTRO_FEATURES_BACKFILL_CONSIDERED	sysinit
DISTRO_FEATURES_append	systemd
VIRTUAL-RUNTIME_init_manager	systemd
INHERIT	mender-full
MENDER_DEMO_HOST_IP_ADDRESS		e.g.192.168.1.1
MENDER_ARTIFACT_NAME		artifact version name

varibalbes for tangleid

Variable	value	remark
TANGLEID_BACKEND		backend server url
TANGLEID_UUID		set UUID

build image
- select image type
- start building
download imgag
- sdimg
- u-boot.elf
run qemu

from meta-mender/meta-mender-qemu/script/mender-qemu

QEMU_AUDIO_DRV=none qemu-system-arm -m 256M \
-kernel ${u-boot elf file name}.elf -net nic,macaddr=${replace you want} \
-net user,hostfwd=tcp::8822-:22 -display vnc=:23 \
-nographic -M vexpress-a9 \ 
-drive file=${image name}-vexpress-qemu.sdimg,if=sd,format=raw