How to Design a Programming Circuit for the ESP32

In the video we look at how to design a circuit for programming an ESP32 module. We also explain the Strapping Pins on the ESP32 and how they work.

Oscilloscope Capture of EN pin and GPIO0 setting ESP32 in Download Boot Mode

How to Use a USB Type-C Connector in Your Next Microcontroller Based Project

In this video we give an overview of the USB type-C connector standard along with other related USB standards. We then look at an example design that implements a USB type-C connector and converts the USB 2.0 communication to serial or UART communication. You can then use the serial data to communicate, debug, or program your microcontroller for programming environments such as Arduino.

TI USB Type C Application Note: https://www.ti.com/lit/wp/slyy109b/slyy109b.pdf?ts=1669008410178&ref_url=https%253A%252F%252Fwww.google.com%252F ST Micro USB Type C Application Note: https://www.st.com/resource/en/technical_article/dm00496853-overview-of-usb-type-c-and-power-delivery-technologies-stmicroelectronics.pdf

USB Type C Connector example implementation

USB 2.0 communication converted to UART / Serial

How to Control Water Flow with Arduino IoT Cloud and a Solenoid Parts 1 and 2

In this two part series we look at how to control a Solenoid using an ESP32 board and the Arduino IoT Cloud. In part one we focus on what a solenoid is and the hardware needed to drive a solenoid open or closed. In part 2 we focus on setting up the Arduino IoT Cloud control.

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Link to tutorial on setting up device on Arduino IoT Cloud: https://docs.arduino.cc/arduino-cloud/getting-started/esp-32-cloud

//**************Arduino Code from Tutorial*********************

#include "thingProperties.h"

#define SOLENOID_PIN 21

void setup() {

  pinMode(SOLENOID_PIN,OUTPUT);

  digitalWrite(SOLENOID_PIN,LOW);

  // Defined in thingProperties.h

  initProperties();

  // Connect to Arduino IoT Cloud

  ArduinoCloud.begin(ArduinoIoTPreferredConnection);

  

  /*

     The following function allows you to obtain more information

     related to the state of network and IoT Cloud connection and errors

     the higher number the more granular information you’ll get.

     The default is 0 (only errors).

     Maximum is 4

 */

  setDebugMessageLevel(2);

  ArduinoCloud.printDebugInfo();

}

void loop() {

  ArduinoCloud.update();

  

  if(water_Scheduler.isActive() || solenoidState) {

    digitalWrite(SOLENOID_PIN, HIGH);

  }

  else {

    digitalWrite(SOLENOID_PIN, LOW);

  } 

}

/*

  Since SolenoidState is READ_WRITE variable, onSolenoidStateChange() is

  executed every time a new value is received from IoT Cloud.

*/

void onSolenoidStateChange()  {

  // Add your code here to act upon SolenoidState change

  /*

  if (solenoidState) {

    digitalWrite(SOLENOID_PIN, HIGH);

  }

  else {

    digitalWrite(SOLENOID_PIN, LOW);

  } 

  */

}

/*

  Since WaterScheduler is READ_WRITE variable, onWaterSchedulerChange() is

  executed every time a new value is received from IoT Cloud.

*/

void onWaterSchedulerChange()  {

  // Add your code here to act upon WaterScheduler change

}