Installing Arduino IDE on Linux

https://askubuntu.com/questions/786367/setting-up-arduino-uno-ide-on-ubuntu

I found I couldn't download over serial port Blink example to NodeMCU

kilnageer@kilnageer-Inspiron-3537:~$ dmesg | grep tty
[    0.000000] console [tty0] enabled
[ 9640.093642] usb 1-1.4: ch341-uart converter now attached to ttyUSB0
[10666.992832] ch341-uart ttyUSB0: ch341-uart converter now disconnected from ttyUSB0


[10668.867323] usb 1-1.4: ch341-uart converter now attached to ttyUSB0
kilnageer@kilnageer-Inspiron-3537:~$ sudo adduser kilnageer dialout

Then logged out as Kilnageer and back in. Download then worked.

Had to include libraries PubSubClient for MQTT and adafruit unified sensor


https://lastminuteengineers.com/esp8266-dht11-dht22-web-server-tutorial/



http://www.steves-internet-guide.com/install-mosquitto-linux/

Installing The Mosquitto Broker

The download links and install directions for Linux are here.
I followed the install instructions for Ubuntu but they seemed to miss a few important steps. Here are the steps I used.

• sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa
• sudo apt-get update
• sudo apt-get install mosquitto
• sudo apt-get install mosquitto-clients 
• 
  

kilnageer@kilnageer-Inspiron-3537:~$ mosquitto_sub -h 192.168.1.100 -t \esp8266_2_arduino_out
{"micros":22966832,"counter":4}
{"micros":28040128,"counter":5}


Trouble with DHT22 though DHT11 works. May use code here to investigate:
https://www.keuwl.com/electronics/rduino/bluet/08-dht11/

Rather than Adafruit uni sensor library for DHTXX.

Also .cpp code available from here:
https://www.instructables.com/id/How-to-interface-Humidity-and-Temperature-DTH11-Se/
https://drive.google.com/file/d/0B1paTI5fzcHodno5azFOSVVDT0E/view?usp=sharing