I am working on a school project and need to know how to do this. For the moment just being able to do this with the bleuart_cmdmode example sketch is sufficient and I can work from there. We did this in class weeks ago but the sketch I made is on the school computer which I don't have access to and I can't for the life of me get it to work.
For sake of simplicity say I have an int variable in my sketch, I want to be able to send a command from the Bluefruit LE app that makes the Arduino print to the BL app the value of that variable. And another command that increments the value of the variable in some manner. How would I do that? I've been messing around with it and it seems like it should be incredibly easy but I can't get it. When we did this in class it was just a few lines of code added after the bolded part in the code provided. I'm not at my computer at the moment so all I can't provide is the original version of this example sketch, I'll be able to provide more info a little later.
/*********************************************************************
This is an example for our nRF51822 based Bluefruit LE modules
Pick one up today in the adafruit shop!
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
MIT license, check LICENSE for more information
All text above, and the splash screen below must be included in
any redistribution
*********************************************************************/
#include <Arduino.h>
#include <SPI.h>
#if not defined (VARIANT_ARDUINO_DUE_X) && not defined (VARIANT_ARDUINO_ZERO)
#include <SoftwareSerial.h>
#endif
#include "Adafruit_BLE.h"
#include "Adafruit_BluefruitLE_SPI.h"
#include "Adafruit_BluefruitLE_UART.h"
#include "BluefruitConfig.h"
/*=========================================================================
APPLICATION SETTINGS
FACTORYRESET_ENABLE Perform a factory reset when running this sketch
Enabling this will put your Bluefruit LE module
in a 'known good' state and clear any config
data set in previous sketches or projects, so
running this at least once is a good idea.
When deploying your project, however, you will
want to disable factory reset by setting this
value to 0. If you are making changes to your
Bluefruit LE device via AT commands, and those
changes aren't persisting across resets, this
is the reason why. Factory reset will erase
the non-volatile memory where config data is
stored, setting it back to factory default
values.
Some sketches that require you to bond to a
central device (HID mouse, keyboard, etc.)
won't work at all with this feature enabled
since the factory reset will clear all of the
bonding data stored on the chip, meaning the
central device won't be able to reconnect.
MINIMUM_FIRMWARE_VERSION Minimum firmware version to have some new features
MODE_LED_BEHAVIOUR LED activity, valid options are
"DISABLE" or "MODE" or "BLEUART" or
"HWUART" or "SPI" or "MANUAL"
-----------------------------------------------------------------------/
#define FACTORYRESET_ENABLE 1
#define MINIMUM_FIRMWARE_VERSION "0.6.6"
#define MODE_LED_BEHAVIOUR "MODE"
/=========================================================================*/
// Create the bluefruit object, either software serial...uncomment these lines
/*
SoftwareSerial bluefruitSS = SoftwareSerial(BLUEFRUIT_SWUART_TXD_PIN, BLUEFRUIT_SWUART_RXD_PIN);
Adafruit_BluefruitLE_UART ble(bluefruitSS, BLUEFRUIT_UART_MODE_PIN,
BLUEFRUIT_UART_CTS_PIN, BLUEFRUIT_UART_RTS_PIN);
*/
/* ...or hardware serial, which does not need the RTS/CTS pins. Uncomment this line */
// Adafruit_BluefruitLE_UART ble(Serial1, BLUEFRUIT_UART_MODE_PIN);
/* ...hardware SPI, using SCK/MOSI/MISO hardware SPI pins and then user selected CS/IRQ/RST */
Adafruit_BluefruitLE_SPI ble(BLUEFRUIT_SPI_CS, BLUEFRUIT_SPI_IRQ, BLUEFRUIT_SPI_RST);
/* ...software SPI, using SCK/MOSI/MISO user-defined SPI pins and then user selected CS/IRQ/RST */
//Adafruit_BluefruitLE_SPI ble(BLUEFRUIT_SPI_SCK, BLUEFRUIT_SPI_MISO,
// BLUEFRUIT_SPI_MOSI, BLUEFRUIT_SPI_CS,
// BLUEFRUIT_SPI_IRQ, BLUEFRUIT_SPI_RST);
// A small helper
void error(const __FlashStringHelper*err) {
Serial.println(err);
while (1);
}
//
/*!
@brief Sets up the HW an the BLE module (this function is called
automatically on startup)
*/
//
void setup(void)
{
while (!Serial); // required for Flora & Micro
delay(500);
Serial.begin(115200);
Serial.println(F("Adafruit Bluefruit Command Mode Example"));
Serial.println(F("---------------------------------------"));
/* Initialise the module */
Serial.print(F("Initialising the Bluefruit LE module: "));
if ( !ble.begin(VERBOSE_MODE) )
{
error(F("Couldn't find Bluefruit, make sure it's in CoMmanD mode & check wiring?"));
}
Serial.println( F("OK!") );
if ( FACTORYRESET_ENABLE )
{
/* Perform a factory reset to make sure everything is in a known state */
Serial.println(F("Performing a factory reset: "));
if ( ! ble.factoryReset() ){
error(F("Couldn't factory reset"));
}
}
/* Disable command echo from Bluefruit */
ble.echo(false);
Serial.println("Requesting Bluefruit info:");
/* Print Bluefruit information */
ble.info();
Serial.println(F("Please use Adafruit Bluefruit LE app to connect in UART mode"));
Serial.println(F("Then Enter characters to send to Bluefruit"));
Serial.println();
ble.verbose(false); // debug info is a little annoying after this point!
/* Wait for connection */
while (! ble.isConnected()) {
delay(500);
}
// LED Activity command is only supported from 0.6.6
if ( ble.isVersionAtLeast(MINIMUM_FIRMWARE_VERSION) )
{
// Change Mode LED Activity
Serial.println(F(""));
Serial.println(F("Change LED activity to " MODE_LED_BEHAVIOUR));
ble.sendCommandCheckOK("AT+HWModeLED=" MODE_LED_BEHAVIOUR);
Serial.println(F(""));
}
}
//
/*!
@brief Constantly poll for new command or response data
*/
//
void loop(void)
{
// Check for user input
char inputs[BUFSIZE+1];
if ( getUserInput(inputs, BUFSIZE) )
{
// Send characters to Bluefruit
Serial.print("[Send] ");
Serial.println(inputs);
ble.print("AT+BLEUARTTX=");
ble.println(inputs);
// check response stastus
if (! ble.waitForOK() ) {
Serial.println(F("Failed to send?"));
}
}
** // Check for incoming characters from Bluefruit**
** ble.println("AT+BLEUARTRX");**
** ble.readline();**
** if (strcmp(ble.buffer, "OK") == 0) {**
** // no data**
** return;**
** }**
// Some data was found, its in the buffer
Serial.print(F("[Recv] ")); Serial.println(ble.buffer);
ble.waitForOK();
}
//
/*!
@brief Checks for user input (via the Serial Monitor)
*/
//
bool getUserInput(char buffer[], uint8_t maxSize)
{
// timeout in 100 milliseconds
TimeoutTimer timeout(100);
memset(buffer, 0, maxSize);
while( (!Serial.available()) && !timeout.expired() ) { delay(1); }
if ( timeout.expired() ) return false;
delay(2);
uint8_t count=0;
do
{
count += Serial.readBytes(buffer+count, maxSize);
delay(2);
} while( (count < maxSize) && (Serial.available()) );
return true;
}