Change the SSID of GeneXis Router

Login to the modem by typing the address 192.168.1.1 in the chrome address bar Select the menu "net" from the top panel. Click on the SSID to change the Ssid to new one

Adding Hidden wireless (wifi) to Raspberry Pi3

Open the wpa-supplicant configuration file using editor

sudo nano /etc/wpa_supplicant/wpa_supplicant.conf

Add the following line to the bottom of the file

 network={ ssid="ssid name"

psk="Password"

}

If you are using a hidden ssid then add one more line

network={
    ssid="yourHiddenSSID"
    scan_ssid=1
    psk="Your_wifi_password" 

}

Using Serial Port - Rx Tx in Raspberry Pi 3

To use Rx Tx pin in Raspberry Pi...

In "/boot/config.txt" edit the last line enable_uart=1

Now use /dev/ttyS0 instead of /dev/ttyAMA0

Node MCU programming

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ESP8266 --posting data

Steps

AT+CIPSTART="TCP","WWW.KNRAPACHALLOOR.COM",80

AT+CIPSEND=61

GET http://www.knrapachalloor.com/my.php?dat=9 HTTP/1.0

PIP install

Adding  the path of your pip installation to  PATH system variable.

By default, pip is installed to C:\Python27\Scripts\pip (pip now comes bundled with new versions of python),
so the path "C:\Python27\Scripts" needs to be added to your PATH variable.

To add the path of your pip installation to your PATH variable, goto command prompt and type



setx PATH "%PATH%;C:\Python27\Scripts"

Restart the command prompt 

error - problem connecting to Raspberry Pi 3 with xrdp

sudo apt-get install tightvncserver

will do the task