add_char_params (类型为ble_add_char_params_t)是对characteristic的参数进行赋值,如“低功耗蓝牙ATT_GATT_Profile_Service_Char规格解读”所述,characteristic包含多个attribute,每个attribute都有自己的value/handle/uuid/permission,所以ble_add_char_params_t这个结构体设计的比较复杂。这里需要大家明白的是,characterist...
hvx_params.handle = p_nus->tx_handles.value_handle; hvx_params.p_data = p_string; hvx_params.p_len = &length; hvx_params.type = BLE_GATT_HVX_NOTIFICATION; uint32_t err_code = sd_ble_gatts_hvx(p_nus->conn_handle, &hvx_params); return err_code; but this results in a NRF_ERR...
type = BLE_GATT_HVX_NOTIFICATION; hvx_params.offset = gatts_value.offset; hvx_params.p_len = &gatts_value.len; hvx_params.p_data = gatts_value.p_value; err_code = sd_ble_gatts_hvx(p_cus->conn_handle, &hvx_params); } else { err_code = NRF_ERROR_INVALID_STATE; } return err_...
value_handle; hvx_params.type = BLE_GATT_HVX_NOTIFICATION; hvx_params.offset = gatts_value.offset; hvx_params.p_len = &gatts_value.len; hvx_params.p_data = gatts_value.p_value; err_code = sd_ble_gatts_hvx(p_cus->conn_handle, &hvx_params); } else { err_code = NRF_ERROR_...
hvx_params.type = BLE_GATT_HVX_NOTIFICATION; hvx_params.offset = 0; hvx_params.p_len = &len; hvx_params.p_data = data; err_code = sd_ble_gatts_hvx(conn_handle, &hvx_params); WherevalueToUpdateis set if the last set value of the attribute differed from the...
方法如下: uint32_t ble_lbs_on_button_change(ble_lbs_t * p_lbs, uint8_t button_state) { ble_gatts_hvx_params_t params; uint16_t len = sizeof(button_state); memset(params, 0, sizeof(params)); params.type = BLE_GATT_HVX_NOTIFICATION; params.handle = p_lbs‐button_char_handles...
Service,而在这个Service中我们又定义了两个Characteristic,一个用来读取接收到的数据,一个用于发送接收到的数据。当我们收到数据后触发回调函数,处理我们收到的数据,发送数据则是底层调用了协议栈的sd_ble_gatts_hvx函数。 Service,再由此通过UUID拿到Characteristic,向Characteristic中写入数据,这样BLE模块就可以接收到数据...
hvxParams.p_len = &valueLength;if(localCharacteristicInfo->notifySubscribed) {if(this->_txBufferCount >0) {this->_txBufferCount--; hvxParams.type = BLE_GATT_HVX_NOTIFICATION; sd_ble_gatts_hvx(this->_connectionHandle, &hvxParams);
hvxParams.type = BLE_GATT_HVX_NOTIFICATION; sd_ble_gatts_hvx(this->_connectionHandle, &hvxParams); }else{ success =false; } }if(localCharacteristicInfo->indicateSubscribed) {if(this->_txBufferCount >0) {this->_txBufferCount--;
按照第6)步,重新将开发板连上手机,然后点击右上角的“Enable CCCDs”以使能notification,如下所示: 设备接收数据: 点击RX characteristic旁边的向上箭头,通过手机蓝牙往设备发送:12345678,如下所示: 此时设备通过串口打印出刚才接收到的数据,如下所示: 设备发送数据:在串口助手中输入“abcdefgh”并输入“\n”(注:...