Raspberry pi

Links: https://docs.dataplicity.com/docs/get-pi-connected-to-the-internet https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md https://electronicshobbyists.com/controlling-gpio-through-android-app-over-bluetooth-raspberry-pi-bluetooth-tutorial/

1. Download from https://www.raspberrypi.org/downloads/raspbian/
2. command

   `sudo dd bs=4M if=2019-09-26-raspbian-buster-lite.img of=/dev/sdX conv=fsync`

at sd- “boot” partition

1. in config.txt should append

    dtoverlay=dwc2 

2. in cmdline.txt should add after rootwait

   modules-load=dwc2,g_ether

3. plug the usb, do ssh

   ssh pi@raspberrypi.local

   default user: pi, default password: raspberry

sudo raspi-config

Got device from https://www.aliexpress.com/item/32945416376.html How to use it with Raspbian system

This LCD Module need install driver first.

https://www.raspberrypi.org/downloads/raspbian/

If you don't know how to do that,you can refer to the Raspberry Pi office tutorial

(tested on RaspberryPi 3B+,3B,2B,2B+,1B,ZERO)

Run:

sudo rm -rf LCD-show
 
git clone https://github.com/goodtft/LCD-show.git
 
chmod -R 755 LCD-show
 
cd LCD-show/
 
sudo ./LCD35-show
 
# Wait A Few Minutes, when the system reboot ok, you can see that.

This LCD can be calibrated using a program called xinput_calibrator

1. Install it with the commands :

cd LCD-show/
sudo dpkg -i -B xinput-calibrator_0.7.5-1_armhf.deb

2. Click the Men button on the task bar, choose `Preference → Calibrate Touchscreen.`

3. Finish the touch calibration following the prompts. Maybe rebooting is required to make calibration active.

4. You can create a `99-calibration.conf` file to save the touch parameters (not necessary if file exists). `/etc/X11/xorg.conf.d/99-calibration.conf`

5. Save the touch parameters (may differ depending on LCD) to `99-calibration.conf`