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some useful hints

ESP8266

  • To program the ESP module -> ground GPIO0 before downloading a code.

documentation

draw.io

  1. Open the XML (or create new one) with https://www.draw.io/

  2. Make your changes

  3. Export the Image as PNG and get the XML source

plantuml

@startuml
(*) --> "First Activity"
"First Activity" --> (*)
@enduml

open preview at VSC

  • Ctrl + Shift + N -> to open a new window
  • point to a different root folder
  • Ctrl + Shift + V -> open markdown preview mode
  • Alt + D -> to render plantuml

git bash

cmd task
git checkout -b make new feature branch
git checkout Pre_Master merge feature branch to Pre_Master
git pull merge feature branch to Pre_Master
git merge merge feature branch to Pre_Master
git push --delete origin delete feature branch
git branch -d delete feature branch

S3 sync family pics

via aws console

password is provided on another way

signin_iam_user

  • select S3 bucket family-sync-pics

at console.aws.amazon.com/s3/home klick at family-sync-pics

upload pictures

Hint

Zip your pictures before uploading.

  • Navigate to folder

s3_family-sync

  • Create folder_my_name

s3_create_folder

  • Navigate to folder_my_name

  • Select Upload

  • In new window, add your zip file

s3_upload_window

  • Than Upload with default settings

s3_upload_example

download pictures

  • Navigate to folder

  • Select zip file you want to download

  • Than klick on Download

via aws cli / access key

TODO

raspberry

install os

  • Run lsblk -p to see which devices are currently connected to your machine.
alex@linux-mint:~$ lsblk -p
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
/dev/sda      8:0    0 238,5G  0 disk
├─/dev/sda1   8:1    0   499M  0 part
└─/dev/sda4   8:4    0 237,9G  0 part
/dev/sdb      8:16   0   477G  0 disk
└─/dev/sdb2   8:18   0 476,4G  0 part /

  • Insert SD card

  • Run lsblk -p again. Check for the new device

alex@linux-mint:~$ lsblk -p
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
/dev/sda      8:0    0 238,5G  0 disk
├─/dev/sda1   8:1    0   499M  0 part
└─/dev/sda4   8:4    0 237,9G  0 part
/dev/sdb      8:16   0   477G  0 disk
└─/dev/sdb2   8:18   0 476,4G  0 part/
*** NEW ***
/dev/sdc      8:32   1  14,7G  0 disk
├─/dev/sdc1   8:33   1    56M  0 part /media/alex/boot
└─/dev/sdc2   8:34   1  14,6G  0 part /media/alex/13d368bf-6dbf-4751-8ba1-88bed0
  • Unmount SD card (with partitions)

In this example the SD cards name is /dev/sdc.

umount /dev/sdc1
umount /dev/sdc2
  • Prepare image

Go to download folder of the raspi os image

alex@linux-mint:~/Downloads$ ll
drwxr-xr-x  3 alex alex       4096 Aug 19 17:23  ./
drwxr-xr-x 44 alex alex       4096 Aug 19 14:22  ../
-rw-rw-r--  1 alex alex  452715448 Aug 19 17:10  2020-05-27-raspios-buster-lite-armhf.zip

unzip if not jet done

7z e 2020-05-27-raspios-buster-lite-armhf.zip
  • Copying the image to SD card
dd bs=4M if=2020-05-27-raspios-buster-lite-armhf.img of=/dev/sdc conv=fsync

Hint

you can also combine unzip and copying the image

unzip -p 2020-05-27-raspios-buster-lite-armhf.zip | sudo dd of=/dev/sdc bs=4M conv=fsync