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1. #Connecting coolterm to mbed gives permission denied serial
2. #Connecting coolterm to mbed gives permission denied Pc
3. #Connecting coolterm to mbed gives permission denied Bluetooth

The latter is used to receive writes from the master, which is in-turn written to the HANDLE_HSENS_SERVICE_CHAR_BLINK characteristic on the hello_sensor slaves.Īt any instant a new slave may be connected to the secure_hub or a old one may detach itself by pressing the SW1 button the board. Such notifications are appended along with the Connection ID of the slave, so that the master can identify the slave that has sent the notification. The former is used to transmit the Notifications / Indications received from the hello_sensor devices to the master (if present any). (iii) The GATT DB of the secure_hub device correspondingly has two characteristics HANDLE_SECURE_HUB_SERVICE_CHAR_NOTIFY and HANDLE_SECURE_HUB_SERVICE_CHAR_LED_WRITE.The handles are stored in a global structure g_secure_hub. The CCCD Handle is required, so that the notifications / indications can be enabled / disabled on the hello_sensor slaves. With the attribute handles, the secure_hub device can write to these characteristics descriptors. Once this characteristic is successfully written by a one byte value, the Red LED on the board blinks as many times as the written value.īy the end of the discovery, the secure_hub device stores the Attribute handles of the HANDLE_HSENS_SERVICE_CHAR_BLINK characteristic and the CCCD (Client Characteristic Configuration Descriptor) of the HANDLE_HSENS_SERVICE_CHAR_NOTIFY characteristic. When other security levels are used, a write to this characteristic will result in an “Insufficient Authentication” error. Security Levels (either BTM_LE_AUTH_REQ_MITM or BTM_LE_AUTH_REQ_SC_MITM The user has to manually take care of this in the application level. This means that this characteristic can be written only when the link has been paired with MITM (Man in the middle protection). In the gatt_db.c file of the hello_sensor, it can be noticed that the permissions of this characteristic includes these bitmasks: LEGATTDB_PERM_WRITE_REQ| LEGATTDB_PERM_AUTH_WRITABLE. The secure nature of the application is demonstrated using this characteristic. This characteristic has the properties of Read and Write.

#Connecting coolterm to mbed gives permission denied serial

The Bytes to be notified / indicated are typed in the serial terminal of the hello_sensor device and are transmitted as Notification or Indication to the secure_hub. This characteristic has the properties of Notification and Indication. The hello_service contains two characteristics (Refer hello_sensor/gatt_db.c and hello_sensor/gatt_db.h files)

The GATT DB of the hello_sensor device contains the hello service.

Once a connection is established with the slave, the secure_hub performs a GATT Discovery of the slave using the custom UUIDs of hello_service. The UUID of the service available in the hello_sensor node is verified in the callback, after which the connection is initiated by the secure_hub. A Scan is initiated via GPIO Interrupt button press on the secure_hub device. The hello_sensor project starts advertising, once these details are entered. The 4 security levels supported in this project are In the secure_hub and the hello_sensor projects, the user needs to enter the desired security level and IO Capabilities via console. The Timer and GPIO Button Press Interrupt callbacks increment the suffix in the Device Name by 1 and then continues the advertisement with the incremented name. The Timer and GPIO Interrupts are registered. Upon the reception of this event, we start the Non Connectable High Duty Cycle advertisement.

#Connecting coolterm to mbed gives permission denied Bluetooth

The BTM_ENABLED_EVT indicates that the Bluetooth stack is ready. The BT Stack and the corresponding management callback are started using the wiced_bt_stack_init () API.ĭb_management_cback () function in secure_hub.c handles the events generated for the BLE Stack.

Here the peripheral UART is set for displaying Debug Messages.

#Connecting coolterm to mbed gives permission denied Pc

All the CYW920706 devices will be able to communicate with the PC via PUART interfaces that appear as serial terminal COM Ports in the PC.ĪPPLICATION_START is the program entry point. It in turn serves as a slave for a master device. Related Hardware: CYW920706WCDEVAL Board (2 to 4 required)Īs shown in the abobe block diagram, the Secure Hub can connect with upto 3 slave devices (programmed with hello_sensor project). Tool: WICED Studio 5.1 and above, Any BLE Central (Example: CySmart Mobile Application), Serial Terminal (Example: TeraTerm, CoolTerm) In addition, the device will also be able to pair with a Master, to which it can send the data collected from the slaves or distribute the data from the master to the slaves. This project instantiates a data hub that plays the roles of GAP Central, GAP Peripheral, GATT Client and GATT Server at the same time, and that is able to pair with up to 3 slaves at different security levels. This example demonstrates the implementation of different security levels of pairing and the data transfer in a multi-connection environment.