ios - 将数据从支持 BLE 的 arduino 发送到 iOS 应用程序

Question

我正在使用 Adafruit Bluefruit Feather 构建一个设备，该设备可以收集数据，然后将数据发送到 iPhone，并在 iPhone 上进行读取和处理。我看过无数试图解释如何对设备进行编程的示例，但我似乎对如何通过蓝牙将设备连接到 iPhone 存在误解。

我们的代码基于其中一个 Adafruit 示例，我们尝试合并 Adafruit BLE Gatt 库 (https://learn.adafruit.com/introducing-adafruit-ble-bluetooth-low-energy-friend/ble-gatt)，但它不起作用，这是我们第一次使用蓝牙。我们使用的 iOS 代码来自 https://github.com/nebs/hello-bluetooth .我们没有对 swift 代码做任何更改。欢迎任何建议。我们发现了很多关于从应用程序向 arduino 发送数据的信息，但是关于从 arduino 向应用程序发送数据的信息有限。如果您能让我们知道我们是否走在正确的轨道上，或者在发送数据方面是否应该进行任何更改，我们将不胜感激。

以下是我到目前为止一直在使用的内容:

#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"
#include "Adafruit_BLEGatt.h"
#define FACTORYRESET_ENABLE      1
Adafruit_BluefruitLE_SPI ble(BLUEFRUIT_SPI_CS, BLUEFRUIT_SPI_IRQ, BLUEFRUIT_SPI_RST);
Adafruit_BLEGatt gatt(ble);
void error(const __FlashStringHelper*err) {
  Serial.println(err);
  while (1);
}

int32_t gattServiceId;
int32_t gattNotifiableCharId;
int32_t gattWritableResponseCharId;
int32_t gattWritableNoResponseCharId;
int32_t gattReadableCharId;
int32_t jumperPresentID;

void setup(void){
  while (!Serial);  // required for Flora & Micro
  delay(500);
  boolean success;
  Serial.begin(115200);
  randomSeed(micros());
  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 ){
    Serial.println(F("Performing a factory reset: "));
    if ( ! ble.factoryReset() ){
      error(F("Couldn't factory reset"));
    }
  }
  ble.echo(false);
  Serial.println("Requesting Bluefruit info:");
  ble.info();
  Serial.println(F("Adding the Custom GATT Service definition: "));
  success = ble.sendCommandWithIntReply( F("AT+GATTADDSERVICE=UUID128=00-77-13-12-10-00-00-00-00-00-EE-BA-AD-DA-BE-CF"), &gattServiceId);
  if (! success) {
    error(F("Could not add Custom GATT service"));
  }
  Serial.println(F("Adding the Notifiable characteristic: "));
  success = ble.sendCommandWithIntReply( F("AT+GATTADDCHAR=UUID128=00-67-42-01-14-88-59-77-42-42-AB-BA-DA-DA-EE-CC,PROPERTIES=0x10,MIN_LEN=1, MAX_LEN=20, VALUE=-9999"), &gattNotifiableCharId);
    if (! success) {
    error(F("Could not add Custom Notifiable characteristic"));
  }
  Serial.println(F("Adding the Writable with Response characteristic: "));
  success = ble.sendCommandWithIntReply( F("AT+GATTADDCHAR=UUID128=00-68-42-02-00-77-12-10-13-42-CC-BA-DE-FA-EA-BB,PROPERTIES=0x04,MIN_LEN=1, MAX_LEN=20, VALUE=GREEN"), &gattWritableResponseCharId);
    if (! success) {
    error(F("Could not add Custom Writable with Response characteristic"));
  }
  Serial.println(F("Adding the Writable with No Response characteristic: "));
  success = ble.sendCommandWithIntReply( F("AT+GATTADDCHAR=UUID128=00-69-42-03-00-77-12-10-13-42-CC-BA-DE-FA-EA-BC,PROPERTIES=0x08,MIN_LEN=1, MAX_LEN=20, VALUE=GREEN"), &gattWritableNoResponseCharId);
    if (! success) {
    error(F("Could not add Custom Writable with No Response characteristic"));
  }
  Serial.println(F("Adding the Readable characteristic: "));
  success = ble.sendCommandWithIntReply( F("AT+GATTADDCHAR=UUID128=00-70-42-04-00-77-12-10-13-42-CC-BA-DE-FA-EA-BD,PROPERTIES=0x02,MIN_LEN=1, MAX_LEN=20, VALUE=GREEN"), &gattReadableCharId);
    if (! success) {
    error(F("Could not add Custom Readable characteristic"));
  }
  Serial.print(F("Adding Custom GATT Service UUID to the advertising payload: "));
  ble.sendCommandCheckOK( F("AT+GAPSETADVDATA=02-01-06-03-02-12-13") );

  jumperPresentID = gatt.addCharacteristic(0x04, GATT_CHARS_PROPERTIES_INDICATE, 5, 5, 5);

  /* Reset the device for the new service setting changes to take effect */
  Serial.print(F("Performing a SW reset (service changes require a reset): "));
  ble.reset();

  pinMode(A1, INPUT);
  pinMode(A2, INPUT);
  pinMode(A3, INPUT);
  pinMode(A4, INPUT);
  pinMode(A5, INPUT);
  digitalWrite(A1, LOW);
  digitalWrite(A2, LOW);  
  digitalWrite(A3, LOW);
  digitalWrite(A4, LOW);
  digitalWrite(A5, LOW);
}

void loop(void){
  Serial.println("VOLTAGE");
  int sensorValue = analogRead(A1);
  float voltage = sensorValue * (3.3 / 1023.0);
   delay(2000);
  Serial.println(voltage);
  if(voltage == 0){
    Serial.println("ALERT");
  }
  if(analogRead(A1) == 0 || analogRead(A2) == 0 || analogRead(A3) == 0 || analogRead(A4) == 0 || analogRead(A5) == 0){
      Serial.print("one is removed");
      gatt.setChar(jumperPresentID, 0, 5);
  }else{
    gatt.setChar(jumperPresentID, 2, 5);
  }
  Serial.println(voltage);
  delay(2000);
}

编辑:我添加了 Arduino 串口的输出

Adafruit Bluefruit AT Command Example ------------------------------------- Initialising the Bluefruit LE module: OK! Performing a factory reset: AT+FACTORYRESET

<- OK ATE=0

<- OK Requesting Bluefruit info: ---------------- BLESPIFRIEND nRF51822 QFACA10 5953B6F51A2BE44E 0.6.7 0.6.7 Sep 17 2015 S110 8.0.0, 0.2 ---------------- Adding the Custom GATT Service definition: AT+GATTADDSERVICE=UUID128=00-77-13-12-10-00-00-00-00-00-EE-BA-AD-DA-BE-CF

<- 1

<- OK Adding the Notifiable characteristic: AT+GATTADDCHAR=UUID128=00-67-42-01-14-88-59-77-42-42-AB-BA-DA-DA-EE-CC,PROPERTIES=0x10,MIN_LEN=1, MAX_LEN=20, VALUE=-9999

<- 1

<- OK Adding the Writable with Response characteristic: AT+GATTADDCHAR=UUID128=00-68-42-02-00-77-12-10-13-42-CC-BA-DE-FA-EA-BB,PROPERTIES=0x04,MIN_LEN=1, MAX_LEN=20, VALUE=GREEN

<- 2

<- OK Adding the Writable with No Response characteristic: AT+GATTADDCHAR=UUID128=00-69-42-03-00-77-12-10-13-42-CC-BA-DE-FA-EA-BC,PROPERTIES=0x08,MIN_LEN=1, MAX_LEN=20, VALUE=GREEN

<- 3

<- OK Adding the Readable characteristic: AT+GATTADDCHAR=UUID128=00-70-42-04-00-77-12-10-13-42-CC-BA-DE-FA-EA-BD,PROPERTIES=0x02,MIN_LEN=1, MAX_LEN=20, VALUE=GREEN

<- 4

<- OK Adding Custom GATT Service UUID to the advertising payload: AT+GAPSETADVDATA=02-01-06-03-02-12-13

<- OK AT+GATTADDCHAR=UUID=4,PROPERTIES=32,MIN_LEN=5,MAX_LEN=5,DATATYPE=5 Option Error: DATATYPE=5

<- ERROR Performing a SW reset (service changes require a reset): ATZ

<- OK VOLTAGE 0.97 AT+GATTCHAR=0,01-00-01-02-EE

<- ERROR 0.97 VOLTAGE 0.15 AT+GATTCHAR=0,01-00-01-02-EE

Answer 1

请确保您有足够的电量。如果没有足够的电量启动蓝牙或 Wifi 设备，一些蓝牙或 WiFi Arduinos 在运行 Arduino sketch 后会关闭。另外，尝试使用 Adafruits iPhone 代码尝试连接。 https://learn.adafruit.com/bluefruit-le-connect-for-ios