MCP23017 - Revision history

Sttc at 19:59, 15 February 2020

2020-02-15T19:59:25Z

← Older revision		Revision as of 19:59, 15 February 2020
Line 32:		Line 32:
	Setting up ESP8266 for I2C pins is not necessary in this code. SCL and SDA pins as below:		Setting up ESP8266 for I2C pins is not necessary in this code. SCL and SDA pins as below:

			Connecting pins between MCP23017 and ESP8266
	{\| class="wikitable"		{\| class="wikitable"
	\|-		\|-
	! ~~Pin on~~ MCP23017 !! ESP8266		! MCP23017 <-- !! --> ESP8266
	\|-		\|-
	\| GND \|\| GND		\| GND \|\| GND

Sttc at 17:44, 15 February 2020

2020-02-15T17:44:06Z

← Older revision		Revision as of 17:44, 15 February 2020
Line 5:		Line 5:
	\|Omschrijving= Guide: Connecting MCP23017 to ESP8266		\|Omschrijving= Guide: Connecting MCP23017 to ESP8266
	\|Status=Completed		\|Status=Completed
	\|Contact=~~sttc~~		\|Contact=Sttc
	}}		}}

Sttc: /* Introduction */

2020-02-15T17:33:12Z

Introduction

← Older revision		Revision as of 17:33, 15 February 2020
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	* ESP8266:		* ESP8266:
	~~LiLon~~ NodeMCU V3 4MB flash ESP8266 12E		LoLin NodeMCU V3 4MB flash ESP8266 12E
	More info on ESP8266:		More info on ESP8266:
	https://randomnerdtutorials.com/esp8266-pinout-reference-gpios/		https://randomnerdtutorials.com/esp8266-pinout-reference-gpios/

Sttc at 17:31, 15 February 2020

2020-02-15T17:31:24Z

← Older revision		Revision as of 17:31, 15 February 2020
Line 147:		Line 147:

	== Remarks ==		== Remarks ==
	Pins of VCC,GND,SCL,SDA,RT,ITA,ITB line do not fit to the board together with GPIO pins (PA7, PA6...) > (Do not solder VCC... line pins)		*Pins of VCC,GND,SCL,SDA,RT,ITA,ITB line do not fit to the board together with GPIO pins (PA7, PA6...) > (Do not solder VCC... line pins)
			<br>
	~~== Links ==~~		*ESP8266 configuration on Arduino IDE:
			<br>

			[[File:ESP conf.png\|100px\|left\|thumb\|esp8266]]
			<br>

Sttc: /* Code */

2020-02-15T17:16:59Z

Code

← Older revision		Revision as of 17:16, 15 February 2020
Line 49:		Line 49:
	Required libraries:		Required libraries:
	*Wire		*Wire
	*Adafruit_MCP23017~~.h>~~		*Adafruit_MCP23017

	// MCP23017 Example: Slow key press reaction.		// MCP23017 Example: Slow key press reaction.

Sttc: /* Code */

2020-02-15T17:16:51Z

Code

← Older revision		Revision as of 17:16, 15 February 2020
Line 46:		Line 46:

	== Code ==		== Code ==

			Required libraries:
			*Wire
			*Adafruit_MCP23017.h>

	// MCP23017 Example: Slow key press reaction.		// MCP23017 Example: Slow key press reaction.

Sttc: /* Introduction */

2020-02-15T17:11:18Z

Introduction

← Older revision		Revision as of 17:11, 15 February 2020
Line 15:		Line 15:

	== Introduction ==		== Introduction ==
	MCP23017 is a GPIO expander runs on I2C.		MCP23017 is a GPIO expander that runs on I2C.
	This page forms wiring and communication guide for MCP23017 on ESP8266.		This page forms wiring and communication guide for MCP23017 on ESP8266.

Sttc: Created page with " {{Project |Name=MCP23017 |Picture=Mcp23017.jpg |Omschrijving= Guide: Connecting MCP23017 to ESP8266 |Status=Completed |Contact=sttc }} == Status == Status as of 2020..."

2020-02-15T17:10:57Z

Created page with " {{Project |Name=MCP23017 |Picture=Mcp23017.jpg |Omschrijving= Guide: Connecting MCP23017 to ESP8266 |Status=Completed |Contact=sttc }} == Status == Status as of 2020..."

New page

{{Project
|Name=MCP23017
|Picture=Mcp23017.jpg
|Omschrijving= Guide: Connecting MCP23017 to ESP8266
|Status=Completed
|Contact=sttc
}}

== Status ==
Status as of 2020/1/13:
*Completed

== Introduction ==
MCP23017 is a GPIO expander runs on I2C.
This page forms wiring and communication guide for MCP23017 on ESP8266.

Used components:
* MCP23017
MCP23017 I2C Interface 16bit I/O Extension Module Pin Board IIC to GIPO Converter
https://www.aliexpress.com/item/32883688022.html?spm=a2g0s.9042311.0.0.5d3e4c4d6bMkco

* ESP8266:
LiLon NodeMCU V3 4MB flash ESP8266 12E
More info on ESP8266:
https://randomnerdtutorials.com/esp8266-pinout-reference-gpios/

== Wiring ==

Setting up ESP8266 for I2C pins is not necessary in this code. SCL and SDA pins as below:

{| class="wikitable"
|-
! Pin on MCP23017 !! ESP8266
|-
| GND || GND
|-
| VCC || 3V
|-
| SCL || D1 (GPIO5)
|-
| SDA || D2 (GPIO4)
|}

== Code ==

// MCP23017 Example: Slow key press reaction.
//
// Toggle LEDs and detect keypress.
//
// Example code showing slow reaction of 'button'
// LED to keypress. Leading into why interrupts
// are useful (See next example).
//
// Copyright : John Main
// Free for non commercial use.

#include <Wire.h>
#include <Adafruit_MCP23017.h>

#define MCP_LED1 7
#define MCP_INPUTPIN 8
#define MCP_LEDTOG1 11

Adafruit_MCP23017 mcp;

void setup() {
mcp.begin(); // Default device address 0

mcp.pinMode(MCP_LEDTOG1, OUTPUT); // LED for blinking

mcp.pinMode(MCP_LED1, OUTPUT); // LED output for button

mcp.digitalWrite(MCP_LED1, HIGH); // default > LED turn on

mcp.pinMode(MCP_INPUTPIN,INPUT); // Button i/p to GND
mcp.pullUp(MCP_INPUTPIN,HIGH); // Puled high to ~100k
}

void loop() {

// blinking led
delay(300);
mcp.digitalWrite(MCP_LEDTOG1, HIGH);
delay(300);
mcp.digitalWrite(MCP_LEDTOG1, LOW);

// Transfer input pin state to LED1
if (mcp.digitalRead(MCP_INPUTPIN)) {
mcp.digitalWrite(MCP_LED1,HIGH);
} else {
mcp.digitalWrite(MCP_LED1,LOW);
}

}

== MCP21017 GPIO ==
Number in IDE =
<br>
mcp.pinMode(''Number in IDE'', OUTPUT);

{| class="wikitable"
|-
! MCP21017 !! Number in IDE
|-
| PA0 || 0
|-
| PA1 || 1
|-
| PA2 || 2
|-
| PA3 || 3
|-
| PA4 || 4
|-
| PA5 || 5
|-
| PA6 || 6
|-
| PA7 || 7
|-
| PB0 || 8
|-
| PB1 || 9
|-
| PB2 || 10
|-
| PB3 || 11
|-
| PB4 || 12
|-
| PB5 || 13
|-
| PB6 || 14
|-
| PB7 || 15
|}

== Remarks ==
Pins of VCC,GND,SCL,SDA,RT,ITA,ITB line do not fit to the board together with GPIO pins (PA7, PA6...) > (Do not solder VCC... line pins)

== Links ==