{"id":94,"date":"2015-09-19T12:34:50","date_gmt":"2015-09-19T12:34:50","guid":{"rendered":"https:\/\/einhugur.com\/blog\/?page_id=94"},"modified":"2017-04-15T02:14:53","modified_gmt":"2017-04-15T02:14:53","slug":"xojo-gpio","status":"publish","type":"page","link":"https:\/\/einhugur.net\/blog\/index.php\/xojo-gpio\/","title":{"rendered":"Xojo GPIO"},"content":{"rendered":"

\"\"<\/a><\/p>\n

Guides for GPIO in Xojo<\/h1>\n
\n

\"Wiring<\/a>\u00a0Infrared motion detection<\/a>
\n(Updated 1. May 2016)<\/span><\/p>\n

Shows\u00a02 ways of coding: Using Interrupts or simple polling.
\nSensors: \u00a0HC-SR501,\u00a0<\/span>ST-00082 Mini,\u00a0Mini IR Pyroelectric Infrared PIR Motion Human Sensor Detector Module<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

\n

\"Relay<\/a>Relay board
\n<\/a><\/p>\n

In this example we \u00a0wire up a relay board and let your Xojo code control it.<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

\n

\"F85<\/a><\/p>\n

F85 vibration sensor
\n<\/a><\/p>\n

In this example we are going to connect to F85 vibration sensor. This example uses simple polling, and has very easy wiring. Polling can be replaced by using interrupts, see our interrupts examples bellow.
\n<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

\n

\"Flame<\/a><\/p>\n

Flame sensor
\n<\/a><\/p>\n

In this example we are going to connect to flame\u00a0sensor. Simple polling, easy wiring<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

\n

\"DHT22<\/a><\/p>\n

DHT11 and DHT22 humidity & temperature sensors<\/a> (3 pin version)\u00a0<\/span><\/p>\n

Updated on 24. Oct 2015<\/span><\/p>\n

Includes DHT11 device driver Xojo Module and DHT22 device driver module.<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

\n

\"BMP180<\/a><\/p>\n

BMP180 Barometer sensor on GY68 brake-out board<\/a>\u00a0(4 pin version) – (Updated 29. May 2016)<\/span><\/p>\n

Includes Xojo module that acts as device driver for the BMP180 sensor.<\/span><\/p>\n

Uses: I2C bus<\/em><\/p>\n

\n

\"IRSensor\"<\/a>IR Infrared Obstacle Reflection Photoelectric Sensor<\/a><\/p>\n

Simple polling, easy wiring<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

\n

\"HC-SR04<\/a><\/p>\n

HC-SR04 and US-015 – Ultrasonic sensors
\n<\/a><\/p>\n

In this example we are going to connect to HC-SR04 and or US-015\u00a0ultrasonic sensors<\/span><\/p>\n

(Updated 18. Apr 2016)<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

\n

\"Button\"<\/a>Connecting button with GPIO and using interrupts.<\/a><\/p>\n

(Simple wiring, a more involved code)<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

\n

\"RGBLed<\/a>Working with LED’s – And Wiring 4 pin RGB led to Raspberry PI<\/a>
\n(Simple wiring, simple code but more detailed focus\u00a0on the math and how things work)<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

\n

\"2N3904\"<\/a>Putting the GPIO pin behind transistor to get more current<\/a><\/p>\n

And also dealing with undetermined state of the GPIO pin at boot time.<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

\n

\"Optocoupler\"<\/a>Optocouplers<\/a>\u00a0\u00a0–\u00a0New 18. April\u00a02016<\/span><\/p>\n

Creating complete isolation between two separate circuits but sending signals between them.<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

\n

\"AND<\/a>Using logic gates<\/a>\u00a0 –\u00a0New 8. Nov 2015<\/span><\/p>\n

Basic introduction of logic gates and how you can use them in your Raspberry PI circuits with Xojo.<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

\n

\"mfrc-522\"<\/a>
\nMFRC-522 RFID reader in Xojo (Bridged with Python) <\/a> –\u00a0New 29. Oct 2016<\/span><\/p>\n

Connecting to MFRC-522 RFID reader board (13.56 Mhz) from Xojo, using Python drivers.<\/span><\/p>\n

Uses:\u00a0SPI bus, Python bridge<\/em><\/p>\n

\n

\"\"<\/a>
\nRDM6300 125 khz RFID reader<\/a>–\u00a0New 13. Apr 2017<\/span><\/p>\n

Connecting to RDM6300\u00a0RFID reader board (125 khz) from Xojo using serial communications.<\/span><\/p>\n

Uses: UART Serial communications<\/em><\/p>\n

\n

\"PCF8591\"<\/a>PCF8591 Analog To Digital<\/a> –\u00a0Updated\u00a029. May\u00a02016<\/span><\/p>\n

Raspberry PI has no Analog inputs\u00a0or outputs, so to talk to analog devices we need to convert the signal.<\/span><\/p>\n

Uses: I2C bus<\/em><\/span><\/p>\n

PCF8591 Analog To Digital – Braking out of the box<\/a>\u00a0\"PCF8591Final\"<\/a><\/p>\n

Building your own Analog to Digital board to over come limits of the bought brake-out board. This way you can connect up to 8 boards getting 32 channels in and 8 channels out.<\/p>\n

\"pcbfinal\"<\/p>\n

Uses: I2C bus, and Lots of soldering ! (The final board here at bottom used hot air soldering)<\/em><\/p>\n

\n

Building I2C logic converter<\/a>\u00a0– New 29. May 2016<\/span>.<\/p>\n

In this guide we build our own I2C logic converter to let \u00a03.3V and 5V I2C devices co-exist on same bus. This guide also covers how to wire up some common types of pre-made logic converters.<\/span><\/p>\n

Uses: I2C bus<\/em><\/p>\n

\n

\"LCDImage5\"<\/a>HD44780 based LCD display<\/a> –\u00a0New 18. May\u00a02016<\/span><\/p>\n

Guide about how to connect to and control HD44780 displays. 16×2 or 20 x 4 displays. The guide also covers how to send custom Glyphs to the display.<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

HD44780 based LCD display\u00a0– Part 2\u00a0(Non standard sizes)\u00a0<\/a>–\u00a0New 15. Apr\u00a02017<\/span><\/p>\n

\"\"<\/a><\/p>\n

A follow up guide that covers some non standard sizes and versions of HD44780 based LCD displays, including dual channel 40 x 4 display that requires different connection and different coding.<\/span><\/p>\n

Uses:\u00a0Basic GPIO<\/em><\/p>\n

\n

\"MAX7219_LED_MATRIX\"<\/a><\/p>\n

Connecting MAX7219_LED_MATRIX with SPI bus<\/a>\u00a0(A free <\/span><\/p>\n

Einhugur Plugin comes with this guide that acts as device driver for the MAX7219_LED Matrix)<\/span><\/p>\n

(Updated 8. Now\u00a02015)\u00a0<\/span><\/p>\n

\n
\n

If you want to help with making this archive of knowledge for Xojo Raspberry PI developers then you can submit articles to us, your name would be put on it as author. We would try to reformat if needed it to fit the other articles and add links to how to use breadboard if your article uses such and so on.<\/p>\n<\/blockquote>\n

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