Bluetooth SDK

Hi,

I have a CY8CKIT-062-WIFI-BT board and would like to read temperature values from another controller (ESP32 conroller+BME280Sensor), for example.

I use the standard UUIDs (Environmental Sensing Service 0x181a and then the characteristic properties temperature 0x2a6e, humidity 0x2a6F and pressure 0x2a6d). To learn, I use the examples from the ModusToolbox™ Software Training Level 3 - Bluetooth® (e.g. key_ch06_ex04_connect_notify). I don't want to control an LED, just read values.

The GATT database is on.

******************** Application Start ********************
******************** Read BLE Devices ********************
*******************************************************************

Bluetooth Stack Initialization Successful
Bluetooth Management Event: 0x16 BTM_LOCAL_IDENTITY_KEYS_REQUEST_EVT
Bluetooth Management Event: 0x0 BTM_ENABLED_EVT
Bluetooth Enabled
Local Bluetooth Device Address: 00:A0:50:1D:95:63
Commands:
? Help (this message)
s Start scanning and connect
S Stop scanning
d Disconnect
n Turn on Button Count notifications
N Turn off Button Count notifications
0...7 Control LED
r Read LED value

Bluetooth Management Event: 0x17 BTM_BLE_SCAN_STATE_CHANGED_EVT
High duty scanning.
scan_callback function
Device = 30:24:A9:1C:30:6B
scan_callback function
Device = 14:CB:19:E3:C5:BE
scan_callback function
Device = 24:62:AB:F1:F8:2A
scan_callback function
Found Device "ESP32S_BME280" with BD Address: 24:62:AB:F1:F8:2A
RAW Data:
Len = 31 02 01 06 0E 09 45 53 50 33 32 53 5F 42 4D 45 32 38 30 02 0A 03 03 03 1A 18 05 12 12 00 40 00 BB
scan_callback function
Bluetooth Management Event: 0x17 BTM_BLE_SCAN_STATE_CHANGED_EVT
Scanning stopped.
Bluetooth Management Event: 0x14 BTM_PAIRED_DEVICE_LINK_KEYS_REQUEST_EVT
Bluetooth GATT Callback Event: 0x0
GATT_CONNECTION_STATUS_EVT
GATT_CONNECTION_STATUS_EVT: Connect BDA 24:62:AB:F1:F8:2A
Connection ID 32768
Bluetooth Management Event: 0xb BTM_PAIRING_IO_CAPABILITIES_BLE_REQUEST_EVT
Bluetooth Management Event: 0x14 BTM_PAIRED_DEVICE_LINK_KEYS_REQUEST_EVT
Bluetooth Management Event: 0x20 BTM_BLE_CONNECTION_PARAM_UPDATE
Bluetooth Management Event: 0xd BTM_ENCRYPTION_STATUS_EVT
Encrypt status: 0
Bluetooth Management Event: 0x14 BTM_PAIRED_DEVICE_LINK_KEYS_REQUEST_EVT
Bluetooth Management Event: 0x13 BTM_PAIRED_DEVICE_LINK_KEYS_UPDATE_EVT
Bluetooth Management Event: 0xc BTM_PAIRING_COMPLETE_EVT
Pairing complete: 0
Bluetooth Management Event: 0x20 BTM_BLE_CONNECTION_PARAM_UPDATE

I understand the process so far.  Now the services should be read in and I can't get any further.

When I press r for read LED value, a ledHandler = 0x09u is used, where does this value come from (or cccdHandle = 0x0Cu;)?

If I use 0x181a (Environmental Sensing UUID) there is an error.

When I press n or r the following comes up

Bluetooth GATT Callback Event: 0x7

GATT_APP_BUFFER_TRANSMITTED_EVT

Bluetooth GATT Callback Event: 0x1

GATT_OPERATION_CPLT_EVT

p_event_data->operation_complete.status: 0x1

GATT operation failed with status: 1

I don't know how to contact the services to read the value. it works on the smarphone.

We are using the HCI UART of the CYW20719B2 chip in Raw Mode.   We have the communication working , but have noticed that there is a delay of ~ 50ms from when data is placed on the CYW20719's RX Pin to when the RX Interrupt is registered with the Application-Level code (i.e. the callback handler registered at: wiced_transport_cfg_t.p_data_handler ).  This amount of delay seems excessive and is impacting the responsiveness of our system.

What controls the delay from the Hardware Block to the Application Level, ... and can this delay be reduced?

These are our configurations for the HCI UART:

wiced_transport_init(&(wiced_transport_cfg_t) {
.type = WICED_TRANSPORT_UART,
.cfg = {
.uart_cfg = {
.mode = WICED_TRANSPORT_UART_RAW_MODE,
.baud_rate = M_HCI_UART_BAUD_RATE (230400),
},
},
.rx_buff_pool_cfg = {
.buffer_size = RX_BUFFER_SIZE (2000),
.buffer_count = RX_BUFFER_COUNT (2)
},
.p_data_handler = m_hci_uart_rx_handler__,
.p_status_handler = m_hci_uart_status_handler__,
.p_tx_complete_cback = m_hci_uart_tx_complete__,
});

I am using the EZ-Serial Host API Protocol Library with the CYBT-343026-01.

App: 1.2.29 build 29
Stack: 5.2.0 build 22
Protocol: 1.3
HW: CYBT-343026-01

I have found other posts asking about this same issue but none that lead to a solution.

Sometimes the module shows up (broadcasts) as type 2 (BLE) and sometimes as type 3 (Dual Mode). When it shows up as dual mode, I can connect with BT Classic but when it shows up as BLE, I cannot connect in classic mode.

I only require BT Classic. Is there a way to setup for BR/EDR only or force Dual Mode every time? Once connected, I am only using SPP.

Thank you.

Hi,

编程环境ModusToolbox，芯片cyw20719b2，运行于BLE server状态，
(1)程序片段如下：
APPLICATION_START()
{
...
pImgSemaphore = wiced_rtos_create_semaphore();//线程同步信号量
wiced_rtos_init_semaphore(pImgSemaphore);

spi1_thread_pointer = wiced_rtos_create_thread();//初始化线程
wiced_rtos_init_thread(spi1_thread_pointer, SPI1_THREAD_PRIORITY, NULL, spi1_thread_func, THREAD_STACK_MIN_SIZE, NULL) ;
...
}

static wiced_bt_gatt_status_t
tput_gatts_callback(wiced_bt_gatt_evt_t event, wiced_bt_gatt_event_data_t *p_data)
{
...
switch(event)
{
...
case GATT_ATTRIBUTE_REQUEST_EVT://判断client向server的写入值，增加信号量，触发线程函数运行
{
wiced_rtos_set_semaphore(pImgSemaphore);
break;
}
...
}
...
}

static void spi1_thread_func(uint32_t arg )//线程函数
{
wiced_rtos_get_semaphore(pImgSemaphore, 0xffffffff);//等待信号量
//通知外设发送数据
//通过SPI1口连续读入数据，SPI1工作于Slave方式，读入数据错误！
...
}

上述程序的线程函数spi1_thread_func()从读入SPI1读入的数据不正常。
(2)
经调试发现：如果去掉同步信号量，改为如下程序；APPLICATION_START()中初始化的线程函数，直接读入的SPI1数据，数据始终保持正常：
APPLICATION_START()
{
...
//去掉同步信号量
//pImgSemaphore = wiced_rtos_create_semaphore();//线程同步信号量
//wiced_rtos_init_semaphore(pImgSemaphore);

spi1_thread_pointer = wiced_rtos_create_thread();//初始化线程
wiced_rtos_init_thread(spi1_thread_pointer, SPI1_THREAD_PRIORITY, NULL, spi1_thread_func, THREAD_STACK_MIN_SIZE, NULL) ;
...
}

static wiced_bt_gatt_status_t
tput_gatts_callback(wiced_bt_gatt_evt_t event, wiced_bt_gatt_event_data_t *p_data)
{
...
switch(event)
{
...
case GATT_ATTRIBUTE_REQUEST_EVT://判断client向server的写入值，增加信号量，触发线程函数运行
{
//wiced_rtos_set_semaphore(pImgSemaphore);//去掉set semaphore操作
break;
}
...
}
...
}

static void spi1_thread_func(uint32_t arg )//线程函数
{
//wiced_rtos_get_semaphore(pImgSemaphore, 0xffffffff);//去掉等待信号量，APPLICATION_START()中初始化的线程函                                                                                                                           //数，直接读入的SPI1数据
//通知外设发送数据
//通过SPI1口连续读入数据，SPI1工作于Slave方式，读入数据保持正确！
...
}
(3)
如果将wiced_rtos_init_thread() 函数从APPLICATION_START()中移至tput_gatts_callback()，同时spi1_thread_func()去除等待信号量，SPI1读入的数据也是错误的。

请问，该问题是由于同步信号量使用不当，还是线程函数错误引起的？应该怎样修改？

万分感谢！