Arduino plus Delphi Mobile Apps - Beyond Basics
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This document discusses using Arduino and ARM microcontrollers for prototyping and connecting sensors. It provides an overview of common microcontroller components like analog and digital I/O, PWM, memory types, and how to interface sensors using resistors. Examples are given for connecting an LED, reading button presses, triggering a relay, and communicating with sensors using protocols like I2C. Complete Arduino code is shown for controlling devices from a Delphi app over WiFi.
![Remember the 20mA max current?
•Ohm’s law
•V[Volt]=R[ohm].i[Ampere]
•R = 5/0,020 = 250 ohm
• LED internal resistance is very low! In this case we considered it tends to zero](https://image.slidesharecdn.com/arduinoplusdelphimobilebeyondebasics-vicfernandes-itdevcon2016-161103143706/85/Arduino-plus-Delphi-Mobile-Apps-Beyond-Basics-38-320.jpg)
Arduino plus Delphi Mobile Apps - Beyond Basics
- 1. Arduino+Delphi Mobile Beyond Basics Victory Fernandes Embarcadero MVP-Brazil
- 3. Victory Fernandes • I love Delphi since 1998! • Embarcadero MVP-Brazil • CTO at TKSSoftware.com • Electrical Engineer; Msc. Medicine Neuro-Science • INDEVA Manipulators and AGVs representative
- 4. How big is Brazil?
- 5. How big is Brazil? ExtremeDelphi 2016 events so far we travelled +10.0000km
- 6. Embarcadero Conference Brazil 2016 • Oct,26 – São Paulo – Brazil • 7 simultaneous rooms • 600+ attendees are expected #ECON2015 www.embarcaderoconferece.com.br
- 7. Factory floor weighing scales
- 8. Factory floor weighing scales
- 12. Production tracking as we found!
- 14. Delphi Intraweb app on TV
- 15. Delphi Intraweb app on Mobile + SMS
- 16. Worked with microcontrollers before?
- 18. First prototype used Arduino…
- 19. Why we ended up using ARM?
- 20. NYQUIST theorem
- 21. • Learn about the signal to be sampled • Choose the right sensor • Dimentions, Weight, Voltage, other general limitations • Sample rate vs. File size vs. Recording speed • Prototype circuit dimentions, weight, power consumption, other general limitations etc… • Battery usage • Prototype Housing "Microcontrollers for Dummies"
- 23. • Prototyping platforms • Open source Software and Hardware • Application? Size, power consumption… • 8bits, 32bits… • 16MHz, 95Mhz… • 32KB-512KB Flash; 2KB-32KB RAM, SRAM, EEPROM… • 8051, PIC, AtMega, ARM… • Intel, Microchip, Atmel, Freescale, NXP… "Microcontrollers for Dummies"
- 24. Digital I/Os
- 25. •Numbered pins 0 to 13 •6 of them with suport for PWM •0 (zero) = LOW = 0 Volts •1 (one) = HIGH = 5 Volts •Max. current output 20mA Digital I/Os
- 26. PWM
- 27. • Equivalent to analog output; Allows to control signal power output (Watts) and can be used to dimmers leds, control motor speed etc... PWM – Pulse Width Modulation
- 28. Analog Input
- 29. • Numbered pins A0 to A5 • Voltage input from 0 to 5V is mapped to a Byte •Binary values from 0000-0000 to 1111-1111 •Decimal values from 0 to 255 • Allows to read analog sensors for temperature, light, distance, etc... Analog Input
- 30. There is more… SPI-Serial Peripherical Interface I2C-inter-Integrated Circuit
- 31. • RISC •Reduced Instruction Set Computer •131 Assembler instructions; 1 instruction per cycle • At 16MHz its almost 16x106 lines of code per second! ATMega328P
- 32. •EEPROM memory, once you record there is no need for a power supply in order to keep its contents. •This is where your program code is stored after you download it to to the microcontroller... Flash memory - 32KB
- 33. •Static Random Access Memory, will keep its contents as long as the power is available; Not need for refresh like DRAM. •This is where the microcontroller executes our program... No power? All status and variable values are lost! SRAM Memory - 2KB
- 34. •Electrically-Erasable Programmable Read- Only Memory •This is where we record data that we do not want to lose after shutdown! EEPROM Memory - 1KB
- 35. Not that much?
- 37. "Hello world”? Why the resistor?
- 38. Remember the 20mA max current? •Ohm’s law •V[Volt]=R[ohm].i[Ampere] •R = 5/0,020 = 250 ohm • LED internal resistance is very low! In this case we considered it tends to zero
- 39. Voila!
- 40. The fun goes on…
- 41. Can we trigger a relay like this?
- 42. Voltage/Current output coupling Transistors triggering higher currents/v oltage ULN2001-2002-2003-2004 6-25V; up to 500mA
- 44. Now lets say I want to read a sensor…
- 45. Now lets say I want to read a sensor…
- 46. Now lets say I want to read a sensor…
- 47. Can I do this?
- 49. PULL DOWN resistor when OPEN Vout = GND = 0V LOW is read when CLOSED Vout = Vin = 5V HIGH is read Usually high values around 10kOhm
- 50. PULL UP resistor
- 51. PULL UP resistor when OPEN Vout = Vin = 5V HIGH is read when CLOSED Vout = GND = 0V LOW is read Usually low values around 300ohm
- 52. Do we really need the resistors?
- 53. What if I want to use industrial sensors?
- 54. Optocoupler, Opto-Isolator or Photo-Coupler
- 56. Delphi Android/iOS app ON OFF UDP Server 192.168.1.177:8888 ’H’ ’H’ ’H’=On ’L’ ’L’ ’L’=Off
- 57. Robocore Padawan www.robocore.net/loja/produtos/arduino-shield-padawan.html Temperature sensor Joystick Potentiometer RGB LED General connector supports Digital input Digital outout/PWM 7 segment diplay Light sensor
- 58. DFRobot accessory board www.dfrobot.com/index.php?route=product/product&path=35&product_id=1045 RGB LED Joystick Potentiometer RelayBuzzer LCD Display Pressure/ Humidity
- 63. Coding the complete Arduino C code…
- 64. VCL demo
- 65. VCL demo