bluetooth project compilation error: 'client' was not declared in this scope

Using Arduino Programming Questions
1

Hey guys,

Im using Adafruit's Bluetooth Low Energy (BLE 4.0) nRF8001 Breakout board to establish a connection between my Arduino and Android device.

My arduino code is below:

#include <Adafruit_BLE_UART.h>

#include <SPI.h>

#include <aREST.h>

// Libraries
// Pins
#define ADAFRUITBLE_REQ 10
#define ADAFRUITBLE_RDY 2 // This should be an interrupt pin, on Uno thats #2 or #3
#define ADAFRUITBLE_RST 9

// Relay pin
const int relay_pin = 7;

// Create aREST instance
aREST rest = aREST();

// BLE instance
Adafruit_BLE_UART BTLEserial = Adafruit_BLE_UART(ADAFRUITBLE_REQ, ADAFRUITBLE_RDY, ADAFRUITBLE_RST);

void setup() {
// put your setup code here, to run once:
Serial.begin(115200);

BTLEserial.begin();

rest.set_id("001");
rest.set_name("relay_control");

pinMode(relay_pin, OUTPUT);

}

void loop() {
// Tell the nRF8001 to do whatever it should be working on.
BTLEserial.pollACI();

// Ask what is our current status
aci_evt_opcode_t status = BTLEserial.getState();

// Handle REST calls
if (status == ACI_EVT_CONNECTED) {
rest.handle(BTLEserial);
}

}

As you can see, Im using Adafruit's library for this particular chip along with a REST api library.

However, im receiving this error message (below) whenever I try to compile the project :

In file included from bluetoothArduino.ino:5:0:
C:\Users\Gokul\Documents\Arduino\libraries\aREST-master/aREST.h: In member function 'void aREST::publish(Adafruit_BLE_UART&, String, T)':
C:\Users\Gokul\Documents\Arduino\libraries\aREST-master/aREST.h:369:17: error: 'client' was not declared in this scope
publish_proto(client, eventName, value);
^
Error compiling.

Im new to the arduino and am unsure about what is causing this error. Any advice would be much appreciated!

Thanks in advance!

2

The error message says the error is in the aREST.h file. So how about showing us the library you're using so we can actually see where the error is.

3

Hi Delta_G!

Thanks for offering to help! Here is the github link for the library im using : GitHub - marcoschwartz/aREST: A RESTful environment for Arduino

4 
#elif defined(_ADAFRUIT_BLE_UART_H_)
void handle(Adafruit_BLE_UART& serial) {

  if (serial.available()) {

    // Handle request
    handle_proto(serial,false,0);

    // Answer
    sendBuffer(serial,100,1);

    // Reset variables for the next command
    reset_status();
  }
}

template <typename T>
void publish(Adafruit_BLE_UART& serial, String eventName, T value) {

  // Publish request
  publish_proto(client, eventName, value);

}

Someone didn't test that library very thoroughly. Clearly, you have ADAFRUIT_BLE_UART_H defined, or the compiler wouldn't even be trying to use that particular publish() function.

In that function, it seems that serial is the object to be passed to publish_proto(). In all the other blocks, the argument to publish() is called client.

5

Thanks for the reply PaulS!

So would this mean I can't use this library? Or is there some way to work around this issue ?

6

So would this mean I can't use this library?

If you can't use an editor, I'm afraid that you will need different hardware in order to be able to use the library as-is.

Or is there some way to work around this issue ?

Fire up a text editor, and change client to serial in the publish_proto() call in the block that deals with your hardware.

You should also report the problem to Adafruit.

7

Thanks PaulS! I made your suggested changes and it compiled fine!

Cheers :slight_smile: