emrine.com on Arduino

Adafruit 1.44" Color TFT LCD Display  breakout - ST7735R

4x4 Membrane Keypad

Arduino IDE

Premium Male/Male Jumper Wires, 40 x 3" (75mm)

Arduino UNO

Breadboard, 270 Pin

<p ><span >Integration of </span><a href="https://emrine.com/">emrine.com</a><span > QR code-based access control solution on Arduino using an ST7735 1.44&#34; TFT screen and a 4x4 membrane keypad.</span></p><div class="se-component se-video-container __se__float-none" contenteditable="false" style="width: 100%;"><figure style="width: 100%; height: 56.25%; padding-bottom: 56.25%; margin: 0px;"><iframe frameborder="0" allowfullscreen="" src="https://www.youtube.com/embed/QKLvgKy5jTE" data-proportion="true" data-percentage="100%,56.25%" data-size="100%,56.25%" data-align="none" style="width: 100%; height: 100%;" data-index="0" data-file-size="0" data-origin="100%,56.25%"></iframe></figure></div><p ><a href="https://emrine.com/">emrine.com</a><span > is a QR code-based access control solution. You can use it to control access to a lock or any electronic devices equipped with a screen and that can receive user input.</span></p><div class="se-component se-image-container __se__float-none" contenteditable="false"> <figure style="margin: 0px;"><img src=https://projects.arduinocontent.cc/d7cdde67-5c37-4bdc-afef-3c4a17fa8fee.jpg alt="" ><figcaption contenteditable="true"><div>Arduino UNO</div></figcaption></figure></div><div class="se-component se-image-container __se__float-none" contenteditable="false"> <figure style="margin: 0px;"><img src=https://projects.arduinocontent.cc/c0eaa3ee-4308-46d7-9604-679f779cec0c.jpg alt="" ><figcaption contenteditable="true"><div>Arduino Mini</div></figcaption></figure></div><h3 >User flow</h3><p >The flow is the following :</p><ul ><li >Access is denied, user press &#34;#&#34;</li><li >QR code is shown on the screen</li><li ><span >User scans the QR code and is redirected to </span><a href="http://emrine.com/">emrine.com </a><span >where a code is displayed</span></li><li >User enters the code using the keypad and press &#34;#&#34;</li><li >Code is checked on the device. Access is granted if the code is verified</li></ul><h3 >Code</h3><p ><span >Download the sketch from </span><a href="https://github.com/bertrandmartel/emrine-arduino">this GitHub repository</a></p><h3 >Hardware</h3><p >For this demo project, the following harware is required :</p><ul ><li ><span >Adafruit 1.44&#34; Color TFT LCD Display ST7735 (</span><a href="https://www.adafruit.com/product/2088">link</a><span >) or any ST7735 lcd breakout compatible with </span><a href="https://github.com/adafruit/Adafruit-ST7735-Library">Adafruit-ST7735-Library</a></li><li ><span >4x4 or 3x4 membrane keypad (</span><a href="https://www.digikey.com/catalog/en/partgroup/matrix-membrane-keypad/68579">link</a><span >)</span></li><li >Arduino UNO or Arduino mini</li></ul><p ><span >If you are using the 1.8&#34; breakout, you need to update the lcd initializing part to </span><code >tft.initR(INITR_BLACKTAB);</code><span >, check the st7735 library examples if using different LCD screens</span></p><p ><span >If you are using a 3x4 keypad, update </span><code >COLUMN_NUM</code><span >,</span><code >keys</code><span > and </span><code >pin_column</code><span > accordingly.</span></p><h3 >Run the sketch</h3><p ><span >Open </span><code >sketch.ino</code><span > in Arduino IDE</span></p><h3 >Install the dependencies :</h3><ul ><li >in &#34;Library Manager&#34;, type &#34;keypad&#34; in search and install &#34;Keypad by Mark Stanley, Alexander Brevig&#34;</li><li >in &#34;Library Manager&#34;, type &#34;st7735&#34; in search and install &#34;Adafruit ST7735 and ST7789 library&#34;</li><li >in &#34;Library Manager&#34;, type &#34;QRCode&#34; in search and install &#34;QRCode by Richard Moore&#34;</li></ul><h3 >Update Device ID and keys</h3><p ><span >On </span><a href="https://emrine.com/">https://emrine.com</a><span >, login and create a new device</span></p><ul ><li ><span >update </span><code >EMRINE_DEVICE_ID</code><span > according to your own </span><code >Device_ID</code></li></ul><div class="se-component se-image-container __se__float-none" contenteditable="false"> <figure style="margin: 0px;"><img src=https://projects.arduinocontent.cc/90fda19d-06c2-470e-8b43-e06d44ca92ef.png alt="" ><figcaption contenteditable="true"><div>replace the value of EMRINE_DEVICE_ID </div></figcaption></figure></div><ul ><li ><span >update </span><code >EMRINE_KEYA</code><span > and </span><code >EMRINE_KEYB</code><span > respectively to </span><code >keyA</code><span > and </span><code >keyB</code><span > values</span></li></ul><div class="se-component se-image-container __se__float-none" contenteditable="false"> <figure style="margin: 0px;"><img src=https://projects.arduinocontent.cc/2c68e8ff-0f55-4bb3-9072-b5a02d4c32c6.png alt="" ><figcaption contenteditable="true"><div>update EMRINE_KEYA and EMRINE_KEYB values</div></figcaption></figure></div><p >The beginning of your sketch will look like this :</p><pre ><code ><span >#define EMRINE_DEVICE_ID &#34;AIsPkdwm1weM9CSvQiDR&#34;</span><br ></br><span >#define EMRINE_KEYA 9746</span><br ></br><span >#define EMRINE_KEYB 17869</span></code></pre><p >You can now upload the sketch to your device</p><h3 >Dependencies</h3><ul ><li ><a href="https://github.com/adafruit/Adafruit-ST7735-Library">Adafruit-ST7735-Library</a><span >: library for driving ST7735 display</span></li><li ><a href="https://github.com/ricmoo/QRCode">QRCode</a><span >: library for generating QR code</span></li><li ><a href="https://github.com/Chris--A/Keypad">Keypad</a><span >: library for getting keypad events</span></li></ul><h3 >License</h3><p ><span >This project is released under the </span><a href="https://unlicense.org/">Unlicense</a><span > license</span></p>

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