As part of this workshop, you should divide up into teams of 3-4 people. Try to find people with a similar boat "vision" as you to partner with.
Teams will be building a motor-propelled boat, which will require some soldering. Feel free to ask any of the workshop team members if you need help with any part of this process.
Each boat kit will include the following materials. Make sure you let us know if any components are missing! (Please also keep in mind that we do need the parts back at the end of the day!)
- Arduino Nano
- Electronic Speed Controller (ESC) 30A with Reverse
- Micro Servo
- HC-06 Bluetooth Module
- 2S Lipo Battery with XT60 connector
- 2S USB Lipo Charger
- Breadboard
- USB A <-> Mini-B USB cable
- Jumper Wires (Male-to-Male && Female-to-Male)
- Wire Extension
- Brushless Motor
- Propellor
- L-shaped connector
- Goopy goo glue sealant
- Styrofoam (we have sheets and will cut off what your boat needs)
- Popsicle Sticks!
- Hot glue gun
- Soldering irons & solder
- Heat shrink tubing & heaters
- Wire cutters/strippers
- A drill
- Box cutters
- Googly eyes
To avoid using extemely long USB cables to drive the boats from the water to your laptops, the HC-06 Bluetooth module will allow you to run Johnny-Five commands wirelessly to the Arduino Nano. The Nodeboats team has pre-configured the modules to do this, so the following instructions are useful if you are building the boat at home later or need to reconfigure the module. They are based on the HC-05 configuration docs with some key changes for the HC-06 and this workshop. Skip to step 4 and 5 to learn about pairing the module with your laptop.
We will program the Arduino to send AT commands to the module to configure it via a SoftwareSerial connection. Wire the TX and RX pins of your module to your Arduino. They need wired in a crossover configuration, so from the module to the Arduino wire TX to pin 10 and RX to pin 11.
You will need the Arduino IDE to upload the configuration sketch file to your Arduino. The sketch will create a connection between the Arduino's serial port and the HC-06, as well as configure the HC-06 to use the same baudrate as Johnny-Five.o
// Set ROBOT_NAME to something unique
#define ROBOT_NAME "RandomBot"
// If you haven't configured your device before use this
#define BLUETOOTH_SPEED 9600 //This is the default baudrate that HC-06 uses
// If you are modifying your existing configuration, use this:
// #define BLUETOOTH_SPEED 57600
#include <SoftwareSerial.h>
// Swap RX/TX connections on bluetooth chip
// Pin 10 --> Bluetooth TX
// Pin 11 --> Bluetooth RX
SoftwareSerial mySerial(10, 11); // RX, TX
/*
The possible baudrates are:
AT+UART=1200,0,0 -------1200
AT+UART=2400,0,0 -------2400
AT+UART=4800,0,0 -------4800
AT+UART=9600,0,0 -------9600 - Default for hc-06
AT+UART=19200,0,0 ------19200
AT+UART=38400,0,0 ------38400
AT+UART=57600,0,0 ------57600 - Johnny-five speed
AT+UART=115200,0,0 -----115200
AT+UART=230400,0,0 -----230400
AT+UART=460800,0,0 -----460800
AT+UART=921600,0,0 -----921600
AT+UART=1382400,0,0 ----1382400
*/
void setup() {
Serial.begin(9600);
Serial.println("Starting config");
mySerial.begin(BLUETOOTH_SPEED);
delay(1000);
// Should respond with OK
mySerial.print("AT\r\n");
waitForResponse();
// Should respond with its version
mySerial.print("AT+VERSION\r\n");
waitForResponse();
// Should respond with default password, probably 1234
mySerial.print("AT+PSWD\r\n");
waitForResponse();
// Set the name to ROBOT_NAME
String rnc = String("AT+NAME=") + String(ROBOT_NAME) + String("\r\n");
mySerial.print(rnc);
waitForResponse();
// Set baudrate to 57600
mySerial.print("AT+UART=57600,0,0\r\n");
waitForResponse();
Serial.println("Done!");
}
void waitForResponse() {
delay(1000);
while (mySerial.available()) {
Serial.write(mySerial.read());
}
Serial.write("\n");
}
void loop() {}The setup() function will take about 6 seconds to run. You can connect to the Arduino with Serial Monitor and you should see the following output.
Starting config
OK
OK[VERSION]
OK[PSWD]
OK
OK
Done!
If you saw that congratulations, you're done this step.
If you see the following output instead, you will probably have to change BLUETOOTH_SPEED to another value and upload it again. This could be because the HC-06 chip had different baud rate.
Starting config
Done!
If you are having troubles uploading the firmata firmware to the device, make sure that nothing is connected to pins 0 and 1 when uploading as this can interfere with the upload process.
Once the baud rate is properly set, re upload the StandardFirmataPlus sketch to your board. If you don't do this it might seems that your bluetooth module is getting a connection, the light will stop blinking, but you won't be able to connect.
You can upload StandardFirmataPlus through the Arduino IDE or using firmata-party from the command line.
Once the baud rate is properly set & Firmata reloaded, connect the TX and RX pins to Arduino pins RX0 and TX1 respectively.
Pair to the module from your host device, once you have paired with your bluetooth device the serial port should be visible with the 'ROBOT_NAME' you used in Step 1. It will be something like /dev/tty.ROBOT_NAME-SPPDev (in UNIX) and use COMX in Windows (where X is the number of the port). Use this name to tell Johnny-Five which port to use.
You can test the connection by modifying the blink.js program to add the path to the Bluetooth port and running the program. Make sure Johnny-Five is installed in the code directory (npm install) before running node code/blink.js.
You may need some help while setting up your NodeBoat. Here are some tips and tricks so you can learn from our experiences:
- Check out the build guide to see wiring examples and tips for working with the ESC and servo.
- The Arduino Nano pinout is a handy reference for what each pin can do
- The name of the Bluetooth module should be on its bag, look for this when pairing it with your laptop
- Connect the ground (GND) wire before connecting the power wire, especially when working with the lipo battery.
- Unplugging or turning off power when switching wires is good practice to avoid unexpected short circuits.
First Time Using Johnny-Five? Don't hesitate to ask us for help! That's why we're here. Here are some intro materials and parts of the docs that will be particularly helpful while building your boats: