strange bluetooth problem

[elke]

i am recently experiencing strange behaviour from my flora/bluetooth combo.
i have led sequins attached that are supposed to fade up when i send the letter A through UART and down when i send B.
this all worked smoothly until i updated some firmware.
now the leds sometimes turn on randomly, when i'm not even connected to the flora bluetooth signal.
any idea why?

[Echamberlain]

Can you share your code?

[elke]

/*********************************************************************
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"
#define BLUEFRUIT_HWSERIAL_NAME Serial1

/*=========================================================================*/

// 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)
*/
/**************************************************************************/
int ledPin = 10;
int fadeValue = 0;
void setup(void)
{
pinMode(ledPin,OUTPUT);
while (!Serial); // required for Flora & Micro
delay(500);

Serial.begin(115200);
Serial1.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();
// fade in from min to max in increments of 5 points:

if (ble.buffer[0] == 'A') {
for(int i=0;i<=150;i++){
analogWrite(ledPin, i);
delay(200); // 500mS (0.5S) delay < ----------------- *
}
}
if (ble.buffer[0] == 'B') {
for(int i=0;i<=40;i++){
analogWrite(ledPin, i);
delay(200); // 500mS (0.5S) delay < ----------------- *
}
}

if (ble.buffer[0] == 'C') {
for(int i=0;i>=0;i--){
analogWrite(ledPin, i);
delay(200); // 500mS (0.5S) delay < ----------------- *
}
}

}

/**************************************************************************/
/*!
@brief Checks for user input (via the Serial Monitor)
*/
/**************************************************************************/
bool getUserInput(char buffer[], uint8_t maxSize)
{
// timeout in 100 milliseconds
TimeoutTimer timeout(10);

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;
}