NodeMCU control light bulb

https://www.youtube.com/watch?v=SvDT_PzgEoE

IR Remote Control

https://www.youtube.com/watch?v=urX1G3W6m_8

https://www.youtube.com/watch?v=8E3ltjnbV0c

Long Range Radio

Lelong HC-12
https://www.lelong.com.my/hc-12-si4463-wireless-mcu-serial-port-module-w-spring-antenna-blue-sgrobot-195451458-2020-08-Sale-P.htm


Arduino and HC-12
https://www.youtube.com/watch?v=vqRqtgvltOI

Penang Smart Parking Project

Penang Smartparking project fails:

https://www.malaymail.com/news/malaysia/2019/08/20/penangs-rm115m-smart-parking-system-hits-snag-contractor-told-to-show-cause/1782368

https://www.malaysiakini.com/news/488714


The sensors:
http://www.turboes.com/en/h-col-123.html

http://www.reallin.com/iot-technology/iot-device/magnetism-detector-with-lora-technology.html

https://www.thethingsnetwork.org/marketplace/product/tbs-200


The IOT technology:
https://www.youtube.com/watch?v=6WMzRrmMjQU


My initial impression:
It uses proprietary devices and proprietary standards. Needs to lay down its own LoraWAN network for the TBS-200 sensors to connect. Uses its own proprietary long range radio networks. Uses apps for mobile phones. Google Play has apparently rejected the app. Only iOS is available. That all adds up to the high implementation costs of RM115 million.

Should use:
Internet which is already available and wifi hotspots for long range communication. Also, should build mobile phone browser apps - to avoid the hassle of getting Google and Apple's approval.

L298N Motor Driver

How to test it:
https://www.youtube.com/watch?v=_TEZ2-3H0GY

How to use it:
https://www.teachmemicro.com/use-l298n-motor-driver/

How to set speed:
https://randomnerdtutorials.com/esp32-dc-motor-l298n-motor-driver-control-speed-direction/

Fritzing Model for NodeMCU v3 Lolin and L298N

https://github.com/roman-minyaylov/nodemcu-v3-fritzing/blob/master/NodeMCUv3%20Lolin.fzpz


https://github.com/yohendry/arduino_L298N/blob/master/H-Bridge%20with%20L298N.fzpz

P2P Wifi Direct

Wifi Direct:

https://www.reddit.com/r/esp8266/comments/agy4nt/wifi_direct_and_esp8266/

https://github.com/paulchin/esp8266-wifi-direct-examples


How to server webpage:

https://randomnerdtutorials.com/esp8266-web-server/



References:
A Beginner's Guide to NodeMCU:
https://tttapa.github.io/ESP8266/Chap01%20-%20ESP8266.html

Official NodeMCU documentation:
https://nodemcu.readthedocs.io/en/master/modules/wifi/


How to set static IP for NodeMCU Server:
http://onlineshouter.com/use-esp8266-wifi-modes-station-access-point/

Camera projects

Visual Capturing with OV7670 on Arduino :

https://create.arduino.cc/projecthub/techmirtz/visual-capturing-with-ov7670-on-arduino-069ebb

Lelong STElectronics : Arduino OV7670 VGA Camera Module

https://www.lelong.com.my/arduino-ov7670-vga-camera-module-stelectronics-175927361-2020-04-Sale-P.htm

Cytron:

https://my.cytron.io/p-ov7670-vga-camera-module?gclid=EAIaIQobChMImLaGrart4wIVj4RwCh3OQQtnEAQYAiABEgKV8_D_BwE

Instructables:

https://www.instructables.com/id/OV7670-Without-FIFO-Very-Simple-Framecapture-With-/

ESP-32
https://www.youtube.com/watch?v=U5uvl6kDFJY


Nodemcu with ESP32-cam:

https://www.youtube.com/watch?v=FkTg-Nm2LQc   [ building the car ]
https://www.youtube.com/watch?v=HedMwVT6J3M   [ adding the ESP-32 cam ]

https://blog.naver.com/renucs/221440067950   [ building the car ]

https://blog.naver.com/renucs/221393078919   [ adding the ESP-32 cam ]

https://www.lelong.com.my/esp32-cam-wifi-bluetooth-development-board-ov2640-camera-module-sgrobot-208732495-2020-10-Sale-P.htm   [ SGrobot selling ]

USB connect to ESP32-Cam
https://www.youtube.com/watch?v=U5uvl6kDFJY

https://www.lelong.com.my/cp2102-usb-2-0-to-ttl-uart-module-serial-converter-stelectronics-214438917-2020-08-Sale-P.htm   [ Lelong selling CP2102 ]


ESP32-Cam surveillance camera project
https://www.youtube.com/watch?v=36p9To2hfak

Bare conductive

https://www.bareconductive.com/make/building-a-capacitive-proximity-sensor-using-electric-paint/

(HY000/1130): Host 'localhost' is not allowed to connect to this MariaDB server

When phpmyadmin cannot connect:

How to fix:

https://www.youtube.com/watch?v=NSX-ib2aMDQ

edit file:

C:\xampp\mysql\bin\my.ini

by adding:

skip-grant-tables

to [ mysqld ]  as follows:


# The MySQL server
[mysqld]
skip-grant-tables
port= 3306
socket = "C:/xampp/mysql/mysql.sock"
basedir = "C:/xampp/mysql

Robotics

Main:

https://www.instructables.com/id/NodeMCU-ESP8266-WiFi-Robot-Car-Controlled-by-Appli/
https://www.youtube.com/watch?v=2AL7HfiRlp4


Chassis:
[ 2 layer ]
https://www.lelong.com.my/arduino-2wd-2-layer-smart-sumo-caster-robot-car-chassis-kit-sgrobot-195453283-2020-08-Sale-P.htm

[ 1 layer ]
https://www.lelong.com.my/arduino-2wd-150mm-mini-smart-robotics-car-6v-dc-motor-chassis-kit-set-sgrobot-198538063-2020-11-Sale-P.htm


H-bridge:
https://www.lazada.com.my/products/arduino-l298n-dc-motor-driver-dual-h-bridge-for-smart-car-i157423490-s186683344.html?spm=a2o4k.searchlist.list.2.3eb572a9H8dHDL&search=1





Others:

Using Blynk:
https://www.hackster.io/andrewf1/simplest-wifi-car-using-esp8266-motorshield-37501e

Smartphone controlled Robot using NODEMCU - esp8266:

https://www.youtube.com/watch?v=WITD_wsRcxo

NodeMCU robotic shield:
https://www.lelong.com.my/nodemcu-lua-esp8266-wifi-l293d-motor-driver-expansion-shield-board-sgrobot-197132610-2020-10-Sale-P.htm

Udemy:

https://www.udemy.com/course/esp12e-nodemcu-spy-iot-robot-using-blynk/

Useful apps:

IP Webcam
https://play.google.com/store/apps/details?id=com.pas.webcam

AZ Screen Recorder
https://play.google.com/store/apps/details?id=com.hecorat.screenrecorder.free


How to assemble: 2WD 2 Layer Smart Sumo Caster Round Robot Car Chassis Kit

https://www.youtube.com/watch?v=8GyWYu6kYKM

Parking Project: Using multiple analog sensors

Instructables:

https://www.instructables.com/id/ESP8266-with-Multiple-Analog-Sensors/

Circuit:  https://crcit.net/c/8f90e6a2

Database:

Code:
https://snipit.io/lists/5265/16084

See file:  14-sendata-mux

Browser tests:
http://localhost/parking/setdata.php?a=1&b=1&c=1&d=1&e=1&f=1&g=1&h=1

http://localhost/parking/index.php

http://localhost/parking/setcmd.php?cmd=0

http://localhost/parking/getdata.php

Using CD4051:

https://www.lelong.com.my/cd-4051-stelectronics-210206620-2020-12-Sale-P.htm
http://synacorp.my/v3/en/

Blynk Server Auth Tokens

Public blynk server:

tMZ6z5ihx-Eujz_Lnxcsjnh64hJuaYz6


Private blynk server:

c1viXI8rK9CpPoRLG3nJVJn1rNcYit4T

Hosting your own Blynk Server

Reference:

https://www.youtube.com/watch?v=33ynNkvfvWU

http://docs.blynk.cc/

Download:

https://github.com/blynkkk/blynk-server#blynk-server

Direct download:

https://github.com/blynkkk/blynk-server/releases

Run:

java -jar  server-0.41.8-java8.jar -dataFolder server_data

Getting started with Blynk

How to install Blynk Library for Arduino

http://help.blynk.cc/en/articles/512105-how-to-install-blynk-library-for-arduino

Udemy: Project 8 - Read Light Sensor

Description:
Reads light intensity from LDR and maps it to a range from 0 - 100

Parts:
1. NodeMCU x 1
2. LDR Sensor
3. Jumper wires x 3 (male to male)
4. Breadboard

https://crcit.net/c/bac8809c

Code:

https://snipit.io/lists/5265/15764

Udemy: Project 7 - Read Light Sensor Module

Description:
Reads light intensity. If it exceeds certain threshold, it displays 0, if there is no light, it displays 1 to Serial Monitor.

Parts:
1. NodeMCU x 1
2. LDR Sensor Module
3. Jumper wires x 3 (male to male)
4. Breadboard

Code:
https://snipit.io/lists/5265/15758

Ref:
Using Digital Pin:
https://tutorial.cytron.io/2017/07/10/getting-started-light-sensor-module-sn-light-mod/

Using Analog Pin:
https://www.instructables.com/id/LDR-Sensor-Module-Users-Manual-V10/

Udemy: Project 6 - Analog Read

Description:
This example shows you how to read analog input from the physical world using a potentiometer. A potentiometer is a simple mechanical device that provides a varying amount of resistance when its shaft is turned. By passing voltage through a potentiometer and into an analog input on your board, it is possible to measure the amount of resistance produced by a potentiometer (or pot for short) as an analog value. In this example you will monitor the state of your potentiometer after establishing serial communication between your Arduino or Genuino and your computer running the Arduino Software (IDE).

Note:
You can also use Serial Plotter

Parts:
1. NodeMCU x 1
2. Potentiometer x 1
3. Jumper wires x 3 (male to male)
4. Breadboard

Circuit:
https://crcit.net/c/fe9b46ed

Code:

https://snipit.io/lists/5265/15638

Udemy: Project 5 - Digital Read

Description:
Read a switch, print the state out to the Serial Monitor

Parts:
1. NodeMCU
2. 10 kOhm resistor  x 1
3. push button switch  x 1
4. hookup wires (female to male) x 3
5. breadboard (half-size)


Circuit: https://crcit.net/c/4de4d6d9

Code:

https://snipit.io/lists/5265/15544

Udemy: Project 4 - pwm fade led (Analog out)

Description: Demonstrates the use of analog output to fade an LED

Parts Required:
  1. NodeMCU (1)
  2. LED (1)
  3. 220 ohm resistor (1)
  4. jumper wire (1)
  5. breadboard (1)

Circuit:  https://crcit.net/c/d5f3db14

Code:  https://snipit.io/lists/5265/15534

NodeMCU Lolin V3 pinouts

Online code sharing

Use snipit:

https://snipit.io/lists/5265/15464

login with github's paulchin20@yahoo.com

Tips

Pins high low are inverted:

https://github.com/nodemcu/nodemcu-devkit-v1.0/issues/16

Online Tutorials

Henry's Bench:

http://henrysbench.capnfatz.com/henrys-bench/arduino-projects-tips-and-more/arduino-esp8266-lolin-nodemcu-getting-started/

Robo India:

https://roboindia.com/tutorials/digital-output-nodemcu/

Instructables:

https://www.instructables.com/class/Internet-of-Things-Class/

Udemy: Projects 1 - 3

Some are based on Arduino IDE built-in tutorials:
https://www.arduino.cc/en/Tutorial/BuiltInExamples

All code is on https://snipit.io  under nodemcu list

Circuit is designed using:  https://www.circuit-diagram.org/editor/

1. Hello world Serial Monitor Output: 

https://roboindia.com/tutorials/serial-monitor-nodemcu/

Code:  https://snipit.io/lists/5265/15522

2. Blink built in LED :

Select examples, basic, blink.
Modify builtin pin to D4

Code: https://snipit.io/lists/5265/15526

Ref:
Arduino Examples, 01.Basics, Blink
https://www.arduino.cc/en/Tutorial/Blink


3. Blink external LED (Digital Out) :

Description:
Demonstrates the use of digital output to blink an LED

Select examples, basic, blink.
Modify pin to D4

Parts Required:
  1. NodeMCU (1)
  2. LED (1)
  3. 220 ohm resistor (1)
  4. jumper wire (1)
  5. breadboard (1)

Circuit: https://crcit.net/c/d5f3db14

Code: https://snipit.io/lists/5265/15526

Ref:
Arduino Examples, 01.Basics, Blink
https://www.arduino.cc/en/Tutorial/Blink



UNUSED:

1. Read from Serial Monitor and control onboard LED:
    Code:  https://snipit.io/lists/5265/15464


2. NodeMCU Digital Output – LED Blinking (PWM)
   https://roboindia.com/tutorials/digital-output-nodemcu/

 

   Code: https://snipit.io/lists/5265/15467