How can we set the rs507 Bluetooth pin that is given to our Bluetooth access point (pirani 1000) when the access point is connector mode?
Is it possible with printing one custom barcode that sets the pin? For example ...
I tried the section xx in the guide where shows how to set a "variable pin" on the sr507 and followed the procedure but scanned 3 thrice and scanned the "end" barcode and I set the Bluetooth access point pin to 333 and enabled BT authentication and encryption on both devices.
The devices will only connect if we set both the rs507 pin and the Bluetooth ap (pirani) pin to 12345.
This leads me to believe we cant set the pin? Can we combine the whole procedure into one barcode?
I work on a bluetooth communication between samsung Galaxy tab and a custom device.
On the custom device there is a PIC32 (Microchip) and a bluetooth RN-42. The communication between the PIC and RN-42 is serial (UART).
When I use text protocol all is working fine but with binary protocol the frame sent by the custom device are truncated (8 bytes are missing).
If I add 8 bytes at the end of the frame, complete answer is received by the client.
I have made some tests with several clients (Galxy tab, macbook...) and the result is the same.
I have verified on debug mode than all bytes are sent by the PIC32.
Is someone has encountered this kind of problem ? Any help will be appreciate.
The problem was in the PIC UART configuration.
I have added this line and now it works.
UARTSetFifoMode(UART2, UART_INTERRUPT_ON_TX_NOT_FULL | UART_INTERRUPT_ON_RX_NOT_EMPTY);
I created a WP8 App. It connects to the Bluetooth and detected it.and the Bluetooth module connected as well. But the data are not coming from the Arduino to the phone :(
error code
if(btSerial.available()) {
Serial.println(distance);
btSerial.write(distance);
}
else {
Serial.println("error"); -> always prints this
}
in the code always the error part is printing in the serial monitor. I have attached the pins in the Bluetooth device to below pins.
RXD - 11,
TXD - 10,
GND - GND,
VCC - 5v,
Please help me why is btSerial.available() is not firing ?
You have the logic backwards. available() tests whether the Arduino has data in its receive buffer. It does not test if the connection is ready. So the overall pattern of a serial program
if(someserial.available()) {
someserial.read... loop to get input
print stuff received
}
To write, just write.
//no if's just go
someserial.write("my output")
You do not need to wait. With the two wire serial connection, you have no flow control. In other words, there is no signalling between arduino and bluetooth transceiver about ready or other status. Because the baud rate of the bluetooth link exceeds the baud rate of the arduino serial link, you can't really overflow the bluetooth transmit stream.
The bluetooth aspect of negotiating the connection is meant to be transparent to the Arduino. In other words, your program is the same as if you where using a hardware serial port. If for some reason, you need details into the connection, there are special byte sequences that allow communication with the bluetooth hardware.
I am new to Arduino and I have 2 issues when I tried the BluetoothShieldDemo.
I can only send data from bluetooth module(through serial monitor) to phone but I cannot send from phone to bluetooth module(to display it in serial monitor). I used oscilloscope to check there is signal in the Arduino board RX pin but no data display in the serial monitor. I suspect it is an IO issue so I changed the IO from digital pin 6 and 7 to digital pin 2 and 3, then digital pin 4 and 5. But it is still not working. Then I change the code to use hardware serial (Serial1) and it is working now. I just wonder why it is not working with the SoftwareSerial.
Although I can send and receive data, I cannot change the bluetooth name. The bluetooth module has no response when the below commands are sent. Is it the bluetooth module is in some kind of locked mode? Or the command is different from manufacturer? The bluetooth module that I got has a single CSR 31A2 chip on it. But the other shield that I saw on the web has 2 chips and it is with CSR BC417.
Codes:
blueToothSerial.print("\r\n+STWMOD=0\r\n");
blueToothSerial.print("\r\n+STNA=BluetoothSlave\r\n");
blueToothSerial.print("\r\n+STOAUT=1\r\n");
blueToothSerial.print("\r\n+STAUTO=0\r\n");
delay(2000);
blueToothSerial.print("\r\n+INQ=1\r\n");
Thanks in advance!
1- When using SoftwareSerial, how are you declaring the pins (Input/Output)?, Are you pulling serial data right (giving it enough time between data transmission, but reading at the right time)?
2- Find the datasheet of your module and see what commands does it support.
I'm working on a project with Android and Arduino and am trying to figure out how on the Arduino side to tell if the Bluetooth is connected or not.
I'm using one of these Bluetooth Modules to connect. I know I can send a command through Android, but I'm trying to have an action happen automatically when they connect and not have to run a background application on the Android if possible.
Using the module supplied and nothing else you cannot: notice the module has four connectors:
Power (Vcc)
Ground
Tx (send)
Rx (receive)
Given this interface the only way to determine whether the bluetooth module is paired is to send something to the paired device and have it respond in such as way that your Arduino knows that it is connected. For instance, if your Android program always responds with "Hi there!" when it receives a string "Hello?", then by seingin "Hello?" your Arduino will know that it is paired with your Android phone/tablet. Your Arduino could poll (send the interrogation string) every minute (or every five seconds) to see if it is paired with your device.
There is a better way, but it will require some soldering on your part. If your module is HC-03/HC-05-based, then the PIO9 pin is the "paired indicator LED" (see datasheet here). You could connect that pin to an Arduino input pin and read the level: reading digital 1 will indicate that the device is paired, while reading digital 0 will indicate that it is not. It is possible, though not certain, that the pin on your module labeled STATE is exactly this kind of a pin, i.e. it indicates the paired status. Unfortunately. this pin it isn't connected to the header, so you'll have to solder a wire to the correctponding pad to connect it to your Arduino. You should test it first by connecting a multimeter in voltage mode to that pad and measure the potential between that pad and ground in paired and non-paired state. If this is the pin that responds to the paired state then you are golden. It might be that it indicates power (like the HC-03/05 PIO8 whilc blinks when on). If it turns out that the STATE pin is not the pairing status, then you should request a datasheet from your supplier, and use that to find the status LED connection: one is likely to exist. Once you found the correct pad, verify its function using the voltmeter again. Then solder a wire to that connection and read it from your Arduino.
IMPORTANT: Make sure that your Arduino never puts out a digital 1 on the Arduino pin connected to the bluetooth module status pin: these bluetooth modules run on 3.3V, and connecting any unprotected pins to 5V will be damaging. The Vcc and Txd pins are voltage shifted in the module you bought, but the LED/Status lines are likely not to be. So if the Arduino pin connected to "status" on your Bluetooth module is configured as output and you digitalWrite(HIGH) to it, you will likely damage the Bluetooth module.
Unfortuntaely, the HC-05 will switch states when paired, but won't output a 1 until it's actually connected to something.
For instance, I can unpair my phone from the HC-05, pair again, and then the LED will change state, but the output of the STATE pin is still 0. If I open up an app, and connect to the device manually then the LED, and STATE pin will change state. The LED will periodically blink twice, and the STATE pin outputs a 1 to the Arduino.
If you would like to read the the value of the STATE pin, connect a wire to any of the inputs to the arduino, and code Serial.println(digitalRead(inputPin)); inputPin being the wire to the input of the Arduino.
I've been fighting this thing for months, and have yet to find a way to make this thing automatically connect to my phone. It won't even allow for me to connect to it from my phone to the HC-05 unless I download an app onto my Android. It's possible to bind the HC-05 to a certain address, but even this did not work for me. I want to mess with the "AT+CLASS" command, but the documentation behind the instruction has hindered me thus far.
From the HC-05 datasheet we see that the connection status depends on the output from PI09. Apparently sending "AT+BIND?" to the module will return the status of PI08 & PI09 in the form,
"+ POLAR=PI08,PI09" however this makes no sense to me because in order to get this you must enter AT mode and entering AT mode will disrupt the paired connection, hence it will always send PI09 marked as "not connected".
THUS in order to see if the connection is still live from the arduinos POV I can only see 2 feasible ways:
Program arduino to, every so often, send a "hello?" and if it doesn't receive the expected "Hi back" response, then it is to assume that it isn't connected.
Connect PI09 to an arduino input pin and read it's value whenever you want to check if the connection is live or not
AT+STATE? will return the current state of the connection. Yes you will need to enter at mode, that is done by bringing up pin 11 HIGH on the HC05 module. It does require soldering but it's kinda worth it. It then allows full AT control of the device, then set it LOW to return it to normal working mode.
Another option, which I don't fully understand, is the AT+MPIO? command, which returns the state of all the pins in some strange masked format I don't understand yet.
I use the first option above so that I can terminal (Bluetooth) from my phone to the HC05 and switch on a led/relay etc (ie bring up pin 2 to HIGH) on the HC05. This required entering AT mode (pin 11 HIGH), sending the command AT+PIO=2,1 and then setting pin 11 to LOW to return to normal working mode.
Note: I noticed I had to put a 200ms delay in between high and AT and LOW commands. Angela's solution is nice - I use a cheap XBEE Bluetooth module (HC-05 Bluetooth Bee Master & Slave Module with Bluetooth XBee for Arduino uk2015) 2 units(HC05/6) for 5Stg which are laid out in XBEE format - handy for the 3.3v.