ESP32cam add MCP23017 GPIO expander to program and add digital read/write to code

Using this tutorial as a base for the project - [login to view URL] - update to use a MCP23017 GPIO expander (I2C device) - and add digital read/write to code. Using the adafruit MCP23017 ("Adafruit_MCP23017.h") library (and wire.h or similar library if needed to map I2C pins). Using this board - [login to view URL] . Need to map I2C (SDA and SCL pins - suggested using pins 12/SDA and 14/SCL - or other suitable/available pins on the esp32cam - I should not have to do any soldering - or modifications to board!!) Note - I do not need physical device made or anything else - just code!! Need to use Arduino IDE - so similar language as tutorial: [login to view URL] MUST update tutorial code to add digital read/write to MCP23017 ... see sample read/write code below. Must be able to view webcam and do digital read/write. ************* // Test circuit for esp32cam // and MCP23017 GPIO Expander // Standard SDA is 21 and SCL is 22 // Use wire.h to change SDA SCL pins... // When Flashing - put USB SDA SCL pins for esp32 on SDA 21 and SCL 22 // When Flashing - put USB on standard flashing pins... #include <Wire.h> // set [login to view URL](SDA, SCL) #include "Adafruit_MCP23017.h" Adafruit_MCP23017 mcp; // Instantiate mcp object int dly = 500; // 1/4 second delay void setup(){ [login to view URL](115200); [login to view URL]("Setup starting: Ready"); [login to view URL](12, 14); // NOTE '//' out [login to view URL] in [login to view URL] library! Or will not map pins!! [login to view URL](); // "Start" the mcp object [login to view URL](0, OUTPUT); // relay [login to view URL](1, INPUT); // push button - green [login to view URL](1, HIGH); // turn on a 100K pullup internally [login to view URL](2, INPUT); // touch sensor - filzer custom [login to view URL](2, HIGH); // turn on a 100K pullup internally } void loop(){ // Digital write test - for Relay testing [login to view URL]("Relay - Flashing GPIO: "); // Tell us what pin is flashing. [login to view URL](0, HIGH); // Set pin HIGH (on) delay(dly); // On for 1/4 second [login to view URL](0, LOW); // Set pin LOW (off) delay(dly); // Off for 1/4 Second // digit read test - for push buttons x2 int val1 = [login to view URL](1); // Read the value of pin P1 int val2 = [login to view URL](2); // Read the value of pin P2 if (val1 == HIGH) [login to view URL]("Button: HIGH"); // If Button is Pressed else [login to view URL]("Button: LOW"); // When Button is Released delay(50); [login to view URL]("\t"); if (val2 == HIGH) [login to view URL]("Touch Sensor: HIGH"); // If Button is Pressed else [login to view URL]("Touch Sensor: LOW"); // When Button is Released delay(50); [login to view URL]("\t"); [login to view URL](); }