Nextion Display - Raspberry Pi - Python

sends_data.py - Raspberry Pi 3 Model B+ read data from thingspeak and sends to Nextion display. read_influxdb_data_to_nextion.py - Read influxdb last row and send to Nextion display.

Configuring The GPIO Serial Port On Raspbian Stretch Including Pi 3 B

• sudo raspi-config
  5 Interfacing Options - Enter
  P6 Serial - Enter
  Would you like a login shell to be accessible over serial? - Entert NO
  Would you like the serial port hardware to be enabled? - Enter YES
  

• sudo nano /boot/cmdline.txt
  find:
  console=serial0
  and replace:
  console=serial1
  

• sudo nano /boot/config.txt
  write to the end:
  dtoverlay=pi3-disable-bt
  enable_uart=1
  

• sudo reboot

Correct to have a serial port working on a Pi 3B called: /dev/serial0