sztehlo-telescope

3D printed 150mm Newtonian telescope controlled by raspberry pi zero

Windows environment setup

git + mingw

• download and install git for windows: https://gitforwindows.org/
• path: git from command line and also from third party software
• use bundled openssh
• use openssl library
• checkout windows style commit unix style
• use mintty terminal
• git pull behaviour: rebase
• enable file system caching, disable symbolic links

optional: download GUI for git:

• download and install: https://tortoisegit.org/download/
• git.exe path: C:\Program Files\Git\bin

clone sztehlo-telescope reopsitory:

start git bash
cd /c/git
git clone https://github.com/symat/sztehlo-telescope.git

download python on your machine

• download and use pythonn 3.9 (this is the version used on the PI currently): https://www.python.org/downloads
• choose "Windows installer (64-bit)"
• install with IDLE

setup raspberry PI zero

• download: Raspberry PI Imager (https://www.raspberrypi.com/software/)
• flush the SD card:
  • choose OS: Rapsberry PI OS (other) -> Rapsberry PI OS light (32 bit)
  • choose your SD card
  • options (gear icon):
    • set hostname: telescope-1
    • set username: pi
    • set password: ... (don't forget!)
    • set local (hungarian keyboard)
    • these would be nice, but doesn't work for some reason to me on the OS light version:
      • configure WIFI
      • enable ssh with passwork aduthentication
    • disabling the “Eject media when finished” (was recommended on posts)
  • write
  • wait for the firstrun.sh to appear on the card before ejecting
• start the PI with the SD card, attach HDMI and keyboard (start takes 5-6 minutes, will restart multiple times) and add the wpa config manually
• or if WIFI connection worked, then find out the IP (e.g. port scanner, or router admin)

if you need to add / change WPA config:

sudo nano /etc/wpa_supplicant/wpa_supplicant.conf

'''
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=HU

network={
     ssid="Sztehlo_Diak"
     psk="REDACTED"
     key_mgmt=WPA-PSK
     id_str="school"
}
'''

sudo service wpa_supplicant restart

ifconfig

But sometimes wpa_supplicant didn't work with me and e.g. to change the wifi network, I did change the wpa_supplicant.conf, plus also used networkManager:

sudo nmcli c delete "oldSSID"
sudo nmcli device wifi con "newSSID" password "REDACTED"

Maybe we could remove the whole wpa_supplicant stuff from the firstrun.sh and switch fully to networkmanager?

SSH to the pi, using mingw + ssh

• start git bash and ssh to the IP
  • command like: ssh pi@192.168.x.y
  • user was pi, password was ...
  • you can change password later: passwd
• if WIFI doesn't work, copy the wpa_supplicant.conf (TODO link) file to the SD card
• if you can ssh, but later you want to edit WIFI settings, or add more WIFI networks, edit the wpa_supplicant.conf (TODO link) file on the raspberry PI: sudo vi /etc/wpa_supplicant/wpa_supplicant.conf

run first-time setup

wget -O - https://raw.githubusercontent.com/symat/sztehlo-telescope/main/pi/setup.sh | bash

test rapsberry py dashboard

test the dashboard:

  curl.exe -X POST -H "Content-type: application/json" -d "{ \"ip\":\"192.168.111.222\", \"message\":\"hello world\\n__ wrap after 30 chars _______here___\"}" "http://127.0.0.1:5000/messages/1"

test on PI:

systemctl status oled
journalctl -u oled -n 200
journalctl -u oled -f
echo "dfgsg" > /home/pi/oled
echo -e 'multi\nline' > /home/pi/oled

if oled display not works, enable I2C manually:

sudo raspi-config
go: Interfacing Options >> I2C >> enable ARM I2C interface

connecting via USB (didn't work for me)

https://www.makeuseof.com/how-to-connect-raspberry-pi-to-laptop-or-pc-usb/

install bonjur install RNDIS driver