Touch Screen Interface

[mikeshams]

What issues did you face with this task and how did you resolve them?

[Davinderaman]

• .While making connections, I accidentally connected the Rx pin of the touch screen display to Rx of BB-WI and Tx of the touch screen display to Tx of BB-WI. Because of this, I didn't receive any output on the monitor. Then, I corrected the connections. (Tx of the touch screen display to Rx of BB-WI and Rx of the touch screen display to Tx of BB-WI) and I got desired output.
• When I tried to install the python library with the command pip3 install pyserial, it shows an error because BBB is not connected with Wifi. Then, with the help of the following commands, I connected BBB to wifi: sudo connmanctl connmanctl > scan wifi connmanctl> services connmanctl> connect and after this, I was able to install libraries.
• While transferring the GUI file to the touch screen display through the SD card, I got the error on display. This error was occurred due to not following the sequence properly. The sequence of transferring files to touch screen display :
• 1. Disconnect Vcc pin
• 2. Insert SD card in SD slot of touch screen display
• 3.Again, connect the Vcc pin
• 4.After this process, we receive a message on display, "upload successfully."
• 5.Again, remove the Vcc pin and SD card
• 6. In this step, again connected the Vcc pin, and we can GUI on the touch screen display.

[mikeshams]

Use the following link and try to integrate your python code into C. https://docs.python.org/3/extending/embedding.html?highlight=pfunc#very-high-level-embedding

[Davinderaman]

Here is C code for calling Python code( Interfacing touch screen display with BB-WI):

**#include

include

int main( ) { system("python3 nextion.py") };**

Here, nextion.py is a python script, which I uploaded on Github as well.

[Davinderaman]

another issue I have faced during Interfacing touch screen display with BB-WI I don't find the library for nextion touch screen display in C. I created a python code then I call that code in c code. **#include

include

int main( ) { system("python3 nextion.py") };**