Keyestudio HC-08 Bluetooth module is a new digital transmission module, based on the Bluetooth Specification V4.0 BLE Bluetooth protocol. HC-08 is a relatively new module made byan experiencedBluetooth design and manufacturing supplier in China. It’s mass produced and therefore well-tested. It can be incorporated into products or projects without worrying about being able to get it again. It’s already widely used inmany Bluetoothprojects. I see others are successfully using the BLE extension and these particular Write methods, so I assume this is something I'm doing wrong, or maybe something's gotten corrupted? I did a lot of searching and I don't see anyone else reporting this experience. I'm looking for a little advice on how to resolve it. Do I need to start fresh and reconstruct the app? Note: AUST defaults by 20 seconds. In the MODE1 low-power mode, since the mode is discoverable and connectable, AUST can be set to a minimum of 1 second to save power.

If the module is connected, it will remain in full speed mode after waking up. It will return to the original power mode unless disconnection.Serial.print("Throttle: "); Serial.print(throttle); Serial.print("\ Steering: "); Serial.println(steering); B. The Slave broadcasts data to the Master, supporting one-to-many single communication (in theory, one slave can send to an unlimited number of master. In the experiment, we don’t set the AT command for Bluetooth module, but directly use it together with UNO R3. Bluetooth is default by Slave, default baud rate to 9600. When using, first upload the test code to UNO R3, then connect the Bluetooth to UNO R3, use phone APP and Bluetooth module to achieve the communication function between your phone and UNO R3 control board. The general Bluetooth master (without display, difficult to manually select) has set the UUID filter search. Before connection, the current is determined by the setting of AT+AINT. After connection, mainly determined by AT+CINT.

HC-08 is a Bluetooth 4.0 low energy module, it can easilyconnect toiOS 5 and Android 4.3 or above by using a serial terminal app. You can use the Bluetooth communication up to 87 yards (80 meters) with this Bluetooth BLE module. It also runs on a 2.4GHz frequency. The chipset is CC2540 with 256K Byte space. You can change the role and serial baud rate and it supports AT commands for configuration. analogWrite ( ENA , spin ) ; 266 analogWrite ( ENB , spin ) ; 267 right ( ) ; 268 269 } 270 } 271 if (throttle < 40 ) { 272 if (steering > 40 && steering steering ) { 123 Serial . print ( "Throttle: " ) ; Serial . print (throttle ) ; Serial . print ("\ Steering : 124 " ) ; Serial . println (steering ) ; 125 prevThrottle = throttle ; 126 prevSteering If it is MODE2 low power mode, since this mode is undiscoverable and unconnectable, it is recommended to set AUST to 20 seconds or more to ensure that the module has enough time to connect with other Bluetooth master devices after waking up through the serial port. The user wants to transmit data frequently, proposed to enter mode2 in idle time, need to transmit data to switch to the corresponding mode.NOTE: When you upload your code, don’t connect the Arduino RX pin. If it is connected during upload, the code won’t work. After uploading you must reconnect it for the LED to work. Code explanation The documentation is fairly terse. It gives all of the needed electrical specifications, although it was a little unclear whether you could simply connect it directly to 5V (the documentation suggests it's a 3.3V device). However, the circuit board itself says 3.3 - 6, and I've been successfully using it on 5V. The documentation doesn't fully describe the UUIDs, so I had to do a bit of research. There is only one general service and one associated characteristic UUID that it supports. There is some discussion of AT commands, but I didn't have to use them to make a connection or communicate with the device. I simply set the baud rate (using Arduino "Serial.begin(...)" method) and it worked. It's unclear to me under what circumstances I need to use the AT commands outside of reconfiguring the device. prevSteering