I am trying to send data from Send data from an Adafruit Feather 32u4 Bluefruit LE to Teensy 3.6. I am trying to get data over Bluetooth to the Feather, then send that data to the Teensy. I have tried many different ways of Serial connections, but they have not worked. What is the best way to do this, and if it is Serial, how do I do this properly. Thank you!
I’m case this helps anyone, I have figured it out. I ended up using the 31 and 32 pins on the Teensy 3.6 using the command “Serial4.begin”, then I used the RX TX pins on the adafruit board and the command “Serial1.begin”
The Serial numbers ie. “Serial4” are very important for this, and now it works perfectly.
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AIM: use the processor and bluetooth purely on the cc2541 to read from the free pins on the board but outputting in HID format so it could be used as a keyboard.
I understand that there are a few offical TI hardware components that usually are used to program it (I cannot afford the development kit). Would someone please help me either using arduino and a FTDI board program the cc2541 to do this?
While I have no idea how to use the CC2541, if you're limited by a budget you could get a HC-05 for 4 dollars-ish, and if you so happen to have a (old) PC with a parallel port you can reflash it using RN-42 firmware (need to solder 6 wires and plug em into that port with some resistors), which will allow it do become HID devices like joysticks,keyboards and mice.
Just in case someone stumble on this post later on, the following could help a lot I guess ;)
flashing an HC-05 with another firmware using an FTDI adapter
Enjoy ;)
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I am working with HM10 BLE chip with Arduino. I am able to establish serial communication between the two. In the manufacturer manual from jnhuamao.cn, it says that for AT+DISC? , "...Before V535 max results is 6, Since V535 not limit"
AT+DISC? is the AT command for scanning nearby BLE devices. The firmware for my chips are V539 and V540.
However, I am only able only received maximum 6 devices as scan result in the serial monitor. And they are different everytime. (I have 8 chips powered up nearby). Has anyone ran into the same problem? What could be the problem? What might be the solutions?
THANKS A LOT
the number of discoverable devices for hm-10 is 6 devices in one go.
its in their datasheet.
Even im facing a similar issue.
Im looking for something that will give me upto 20 devices in the scann results.
I bought a HM-15 BLE bluetooth module and successefully connected to Arduino. I am able to sent At commands and I would like to use it for scanning for iBeacons and get their major and minor.
Using AT+DISC? I can see the beacon address but I cannot connect to it and now I am stuck on how to retrieve major and minor
Can you help me? Here is the datasheet of the module:
http://www.elecrow.com/download/bluetooth40_en.pdf
Thanks
Bluetooth beacons do not require a connection and you read the identifiers directly from the advertisement.
Read section 19, Start a discovery scan, and learn how to read and decode the bytes in the discovered peripherals. The exact byte layout varies for different beacon types. For AltBeacon, an open source beacon variant, you can see the byte layout here: https://github.com/AltBeacon/spec
To decode a proprietary beacon format, you will need to learn how that beacon layout differs from the example linked above.
Old question, but just for the record, you can use AT-DISI?
This will scan for beacons, including iBeacons and also AltBeacons. The response from HM-10 will include RSSI for each.
PS: I'm assuming HM-15 and HM-10 operate the same way. Probably not exactly a fully reasonable assumption.
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.
Having a couple of issues with what I was hoping to be fairly straight forward.
I've been transmitting data from my PIC to a PC via RS232 at a baudrate of 115200. I've recently got a RN-41 bluetooth module and was hoping the switch would be as simple as powering the module and connecting the PIC TX (via a max3232) to the RN-41's RX, as the online community has led me to believe.
I'm able to connect to it and pair it to the computer, I'm also able to use PUTTY/Realterm to change the parameters, like the name and baudrate. Finally, by connecting a link to the RX and TX on the bluetooth module and powering it, I'm able to ping text by sending and echoing it using PUTTY, so I'm fairly sure the module isn't broken.
However, when I try to transmit my data from the PIC to the bluetooth module, and view it using realterm (which was working fine with the wired connection) I'm getting data received, but it's not what is expected. I'm expecting a packet of 25 bytes, with a header value of 2, I'm getting around 12-15 bytes and a header of -65.
The first value, -65, is always the same, and the other data can change, which really suggests a baudrate problem, but I've tried a variety of baudrates (changed in my UART code, the bluetooth parameters, and in realterm), and the data doesn't change at all; always wrong.
What have I missed? Anything I need to change in the Bluetooth configurations? I've also checked the parity bit, stop bit, etc, all the same as each other.
The problem was the MAX3232 circuitry. It was necessary for the RS232 connection I was using prior, but when I wanted Bluetooth, which required TTL signals, I was feeding it the same RS232 data!
Making a link straight from the PIC to the Bluetooth receiver solved this problem. Hope this helps someone else in the future!