Showing posts with label BLE Micro. Show all posts
Showing posts with label BLE Micro. Show all posts

Tuesday, August 11, 2015

Building Your Own AVR / Arduino Internet of Things (IoT) Development Board Part 5

Welcome to the final installment of building your own AVR / Arduino compatible internet of things (IoT) development board. In part 5 we open up our new PCBs and build them up. We then do some testing to make sure everything is working correctly. Spoiler alert, this video has a happy ending with a working Arduino compatible board with Bluetooth 4.0 built-in. Below you will find a link to the Eagle files and the Arduino code for the test sketch.



Link to download Eagle files including: library file, project files, and Gerber files:
https://dl.dropboxusercontent.com/u/26591541/AVR_IoT_Board_Eagle_Files_8_8_15.zip


*******************Arduino Test Sketch************************************
//This sketch is to test a DIY Arduino compatiable board with Bluetooth 4.0 on it
//the board is targeted IoT applications. Details can be found of the ForceTronics 
//YouTube channel. This code is open for anybody to use and modify

int wValue = 1; //variable to hold write value (high or low)

void setup() {
   Serial.begin(115200); //start serial
}

void loop() {
  delay(1000);
  setPinMode(OUTPUT, INPUT); //set D2 to D7 as outputs, and D8 to D13 to inputs
  setDigWrite(false, wValue); //set group of pins to write and write high or low
  Serial.print("D2 thru D7 writing "); 
  Serial.println(wValue);
  Serial.println("D8 thru D13 reading the following values....");
  printDigPins(true); //print what dig pins read
  delay(1000);
  setPinMode(INPUT, OUTPUT); //set D2 to D7 as intputs, and D8 to D13 to outputs
  setDigWrite(true, wValue); //set group of pins to write and write high or low
  Serial.print("D8 thru D13 writing "); 
  Serial.println(wValue);
  Serial.println("D2 thru D7 reading the following values....");
  printDigPins(false); //print what dig pins read
  
  delay(1000);
  adcReads(); //read each ADC pin and print result
  
  if(wValue) wValue = 0; //toggle digital write value
  else wValue = 1;
  delay(1000);
}

//function sets D2 thru D7 to input / output and D8 thru D13 to input / output
void setPinMode(int smallMode, int bigMode) {
  for(int i=0;i<6;i++) {
    pinMode((i+2), smallMode);
    pinMode((i+8), bigMode);
  }  
}

//Writes high or low to group of digital pins
void setDigWrite(bool big, int state) {
  if(big) {
    for(int i=0;i<6;i++) {
      digitalWrite((i+8), state);
    }
  }
  else {
    for(int i=0;i<6;i++) {
      digitalWrite((i+2), state);
    }
  }
}

//does digital read on group of digital pins and prints results
void printDigPins(bool big) {
  if(big) {
    for(int i=0;i<6;i++) {
      Serial.print("Value at pin D");
      Serial.print((i+8));
      Serial.print(" --> ");
      Serial.println(digitalRead((i+8)));
    }
  }
  else {
    for(int i=0;i<6;i++) {
      Serial.print("Value at pin D");
      Serial.print((i+2));
      Serial.print(" --> ");
      Serial.println(digitalRead((i+2)));
    }
  }
}


//Reads each ADC pin and prints result
void adcReads() {
  for(int i=0; i<6; i++) {
    Serial.print("ADC value at Pin A");
    Serial.print(i);
    Serial.print(" --> ");
    Serial.println(analogRead(i));
  }
}

Friday, July 10, 2015

Building Your Own AVR / Arduino Internet of Things (IoT) Development Board Part 4

This is part 4 in a 5 part series where we build our own AVR / Arduino Internet of Things (IoT) development board, yay! In this part we will do the PCB layout and discuss how to get our PCB manufactured.


Download Eagle Files



Eagle Parts and Libraries
Libraries Used:
•Atmega 328P --> Library: SparkFun-DigitalIC Device: ATMEGA328P_PDIP
•LM317 --> Library: linear>*317 Device:317T
•Resonator ZTT16.0MHz --> Library: Adafruit Device: CERMOSCILL-THM (CERMOSCILL)
•Ceramic Cap --> Library: rcl > C-EU Device: C-EU050-030X075
•Electrolytic cap --> Library: rcl > CPOL-EU Device: CPOL-EUE2.5-6
•Resistor --> Library: resistor Device: R-EU_0207/10 (R-EU_) Package: 0207/10
•Reset switch --> Library: switch-omron Device: 10-XX
•LED --> Library: led Device: LED5MM (LED)
•Potentiometer --> Library: rcl > R-TRIMM Device: R-TRIMMT93YA
Note: Sparkfun and Adafruit libraries did not come with Eagle, but you can find them on their websites

Parts I made (included in files linked to my blog):
•ForceTronic.lbr --> All header and pin holes and 2.1mm DC Jack
•BLE_Micro_Module.lbr --> BLE Micro

Monday, July 6, 2015

Building Your Own AVR / Arduino Internet of Things (IoT) Development Board Part 3

This is part 3 in a 5 part series where we build our own AVR / Arduino Internet of Things (IoT) development board, yay! In this part we will finalize our design schematic and parts list so we are ready to do PCB layout in part 4.



Final Design Schematic:


Bill of Materials:
  • Atmega 328P MCU (Dip Package)
  • 16MHz resonator
  • BLE Micro from DFRobot or equivalent
  • LM317 Voltage Regulator
  • Resistors (Ohms): 10k, 2x 1k, 2x 300, 1k POTENTIOMETER or 500
  • Capacitors: 4x 100nF (Ceramic) and 1uF (electrolytic)
  • LED 5mm (any color you want)
  • 0.1” male pins
  • 2x 0.1” 2x4 female header (optional)
  • 4x 0.1” pin jumpers
  • DC Power Jack (+ pin is 2.1mm) 
  • 13uH Inductor (optional)
  • Female pin headers: 6 pin, 2x 8 pin, 10 pin
  • 28 pin DIP Socket (optional): part # 4828-3004-CP

Tuesday, June 2, 2015

Building Your Own AVR / Arduino Internet of Things (IoT) Development Board Part 1

In this 5 part video series we will build our own AVR / Arduino Internet of Things (IoT) development board. We will go from a design concept to prototyping our design to PCB layout of our design all the way to a tested and finished development board.


Example parts order for this project (please note that this does not include all the parts)