Raspberry pi Notes

Setting Raspbery pi zero for wifi

setting up tutorial
Download Raspbian lite
Flash Raspbian lite zip file into SD card using etcher software
If SD card is showing wrong capacity or shown as 2 disks, goto device management and delete all partitions of sd card, create new simple volumn of type FAT32. Even then, if etcher could not flash raspbian, try using another laptop.
save a file named ssh (no extension) in the sd card
write the following in a file named wpa_supplicant.conf and save it in the sd card

country=in
ctrl_interface=/var/run/wpa_supplicant 
update_config=1

 
network={
    ssid="WIFI-NAME"
    psk="WIFI-PASSWORD"
    scan_ssid=1
}

use Advanced IP Scanner to find the ip address of raspberry pi.
use PuTTY to connect to raspberry pi ssh terminal. Port is 22, connection type is SSH.
Putty login and password credentials are pi and raspberry (default password).
To transfer files from your pc to raspberry pi use WinSCP software.

Link for code - https://github.com/adafruit/Pi_Internet_Thing_Videos/tree/master/Part_1
Install python and flask in raspberry pi by typing the following 3 commands in putty after logging into the pi.

sudo apt-get update
sudo apt-get install -y python3
sudo apt-get install -y python-pip3 python3-dev
sudo pip3 install flask

Transfer files from your PC to raspberry pi connected in the same wifi using winscp
After transfering the files, you can verify the presence of files in putty using ls command
To run the web server, use the standard command like python main.py

Raspberry Pi zero w layout diagram -
GPIO pins should be given voltages not above 3.3 V and currents not more than 0.5mA. If we use a 3.3 V power source, use resistor of atlease 6 KOhms - link