Tag: wifi

ESP32 wroom 32 – MicroController

  • Fedora ardino IDE issue – https://github.com/arduino/Arduino/issues/11150
  • https://forum.arduino.cc/t/esp32-ide-compiler-importerror-no-module-named-serial/968605/10

sudo pip install pyserial

  • Open Arduino using Sudo
  • Stable repo link for Esp32
https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
  • File > Preference > Additional Board Manager
  • Tools > Board > Board manager > esp32 > Install

  • Tools > Board > ESP32 > ESP32 Dev(or any board that you have)
  • File > Example > WIFI > SimpleWIFIServer
  • update wifi login creds
const char* ssid = "TP-Link_573B";
const char* password = "passowrd";
  • Tools > Serial Monitor

Youtube video : https://www.youtube.com/watch?v=UuxBfKA3U5M

pin out : https://www.studiopieters.nl/esp32-pinout/

esp32 wroom

Power consumption with 1 LED: 5V x 0.08Amp = 0.4 Watt

raspberry pi 4 wifi setup using command line only – bash

  • find the wifi adaptor name
lshw

ls /sys/class/net

it was wlan0 in my case

  • edit /etc/netplan/50-cloud-init.yaml
network:
    ethernets:
        eth0:
            dhcp4: true
            optional: true
    version: 2
    wifis:
        wlan0:
            optional: true
            access-points:
                    "SSID-NAME":
                            password: "your_password"
            dhcp4: yes
  • Test the config
netplan try
netplan --debug try

This command will make the above changes for 120seconds if anything wrong it will be reverted back. OR you can hit Enter to make the changes.

  • apply config
netplan generate 
netplan apply
#enable wifi module

modprobe brcmfmac

#disable
modprobe -rv brcmfmac


nano /etc/modprobe.d/raspi-blacklist.conf

blacklist brcmfmac
blacklist brcmutil
  • Stop wifi without reboot
#disable
rfkill block wifi


#enable
rfkill unblock wifi
  • Using NMCLI
nmcli d

nmcli d wifi list

nmcli d wifi connect my_wifi password <password>

#### with BSSID
root@lp-arm-3:~# nmcli device wifi list
IN-USE  BSSID              SSID            MODE   CHAN  RATE        SIGNAL  BARS  SECURITY  
        xx:06:C3:CD:57:xx  TP-Link_123    Infra  153   270 Mbit/s  100     ▂▄▆█  WPA2      
*       xx:06:C3:CD:57:xx  TP-Link_123    Infra  2     130 Mbit/s  93      ▂▄▆█  WPA2 

====================
nmcli d wifi connect xx:06:C3:CD:57:xx password PASSWORD

More : https://raspberrypi.stackexchange.com/questions/108636/setting-wifi-up-via-the-command-line-ubuntu-server-18-04-4-lts-raspberry-pi-4

https://huobur.medium.com/how-to-setup-wifi-on-raspberry-pi-4-with-ubuntu-20-04-lts-64-bit-arm-server-ceb02303e49b

https://ubuntu.com/core/docs/networkmanager/configure-wifi-connections