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Thu, 2020-07-16 12:23

hdr公司

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BLE中心写入

你好，团队对话，

I have written a program based on the ble_central project, which finds BLE devices with a special name or MAC address.
If a device is found, I connect to it and then I write into a characteristic.
我的问题是：
Every time I try to write to the peripheral, the status is 3 (ATT_ERROR_WRITE_NOT_PERMITTED) at the Write-Completed-Event.
When I try to do it with my mobile phone via nRF Connect App, I can read and write without any problems.
Tried out as a peripheral a Raspberry Pi, my mobile phone and also a Dialog 14680.
Every time the status is 3.

printf("start write\r\n"); uint16_t * mtu = 0; ble_gattc_get_mtu(evt->conn_idx, mtu); printf("MTU Rate: %u\r\n", *mtu); uint8_t test = 0x00; printf("uuid: %s\r\n",format_uuid(&charact[0].uuid)); printf("write\r\n"); ble_gattc_write(evt->conn_idx, charact[0].handle ,false , sizeof(test) ,&test);

charact[0] contains the handler from the Characteristic.

Many thanks for the effort in advance.

致以最诚挚的问候

HDR公司

关键词：

BLE central

DA14682

设备：

DA1468x

周四，2020-07-16 16 16:24

PM_Dialog

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Hi hdr,

Thanks for your question on our public BLE forums. Could you please indicate what is the peripheral? Is another DA14682?

Thanks, PM_Dialog

Fri, 2020-07-17 08:26

(Reply to #2) #3

hdr公司

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I used a Raspberry Pi with

I used a Raspberry Pi with PyBluez as peripheral, my mobile phone with the above mentioned app and a Dialog 14680. I'm now trying a DA 14682 as I can't access the 14680 because the device is potted.

Fri, 2020-07-17 02:23

alex.jian

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高hdr

i have same request

can you tell me what is Write-Completed-Event and how to use??

thanks

2020-07-17星期五08:46

(Reply to #4) #5

hdr公司

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如果我明白的话

如果我明白的话correctly, the Write_Completed_Event is called when I call a ble_gattc_write and it has been executed. In the event I get back the conn_idx, the handler and a status code. In my case the status code is 3, which stands for ATT_ERROR_WRITE_NOT_PERMITTED.

为了描述如何使用事件，我将参考bleèu中心示例项目。

Fri, 2020-07-17 09:52

（回复#5） #6

alex.jian

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高hdr

i also use ble_gattc_write and i add Write_Completed_Event to app_task.c as below , Is this right when ble_gattc_write Completed??

静态常量结构ke\u msg\u处理程序app\u gap\u进程\u处理程序[]=
{
{GAPM_DEVICE_READY_IND, (ke_msg_func_t)gapm_device_ready_ind_handler},
{GAPM_CMP_EVT, (ke_msg_func_t)gapm_cmp_evt_handler},
{GAPC_CMP_EVT, (ke_msg_func_t)gapc_cmp_evt_handler},
{GAPC_CONNECTION_REQ_IND, (ke_msg_func_t)gapc_connection_req_ind_handler},
{GAPC_DISCONNECT_IND, (ke_msg_func_t)gapc_disconnect_ind_handler},
{GAPC\ u GET\ u DEV\ u INFO\ u REQ\ u IND，（ke\ u msg\ u func\ t）GAPC\ u GET\ u DEV\ u INFO\ u REQ\ u IND\ u handler}，
{GAPC_SET_DEV_INFO_REQ_IND, (ke_msg_func_t)gapc_set_dev_info_req_ind_handler},
{GAPM_PROFILE_ADDED_IND, (ke_msg_func_t)gapm_profile_added_ind_handler},
{GAPM\u ADV\u REPORT\u IND，（ke\u msg\u func\t）GAPM\u ADV\u REPORT\u IND\u handler}，
{GAPC_PARAM_UPDATE_REQ_IND，（ke_msg_func_t）GAPC_PARAM_UPDATE_REQ_IND_handler}，
{GAPC\u LE\u PKT\u SIZE\u IND，（ke\u msg\u func\t）GAPC\u LE\u PKT\u SIZE\u IND\u handler}，
{GAPC\u CON\u RSSI\u IND，（ke\u msg\u func\u t）GAPC\u get\u CON\u RSSI\u IND\u handler}，//Alex Add 20191030
{GATTC_READ_IND, (ke_msg_func_t)app_read_ind_handler}, //alex test 2020 0710
{GATTC_SDP_SVC_IND, (ke_msg_func_t)app_disc_all_svc }, //alex test 2020 0710
{GATTC\u CMP\u EVT，（ke\u msg\u func\t）alex\u GATTC\u CMP\u EVT\u handler}，//alex test 2020 0716
//{GAPC_PEER_ATT_INFO_IND, (ke_msg_func_t)app_read_dev_ver_ind_handler}, //alex test 2020 0710

#if (BLE_APP_SEC)
{GAPC_SECURITY_IND, (ke_msg_func_t)gapc_security_ind_handler},
#endif
};

2020-07-17星期五10:28

（回复#6） #7

hdr公司

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I think you use another SDK

我想你用的是另一个SDK和对话芯片。

2020-07-17星期五10:28

PM_Dialog

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Hi hdr,

感谢您的详细回复。根据蓝牙LE规范：

“如果由于权限原因无法写入属性值，则应发送错误响应，错误代码为«写入不允许»。“

Could you please check if the characteristic ( in the Peripheral side ) has write permission? If yes, then I would suggest to double check if the Central (DA14682) writes to the correct handler (charact[0].handle).

此外,这将是非常有用的BLE sniffer log, so that we can understand what is happening over the air.

Thanks, PM_Dialog

Mon, 2020-07-20 14:19

(Reply to #8) #9

hdr公司

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Hello,

外设中的特性具有写权限，处理程序应该是正确的。

静态空句柄\u evt\u gattc\u discover\u char（ble\u evt\u gattc\u discover\u char\u t*evt）{。。。如果（ble|uuid|equal（&evt->uuid，&list| uuid|equal（&evt->uuid，&list|uuid|nb））{charact[0].handle=evt->handle；charact[0].uuid=evt->uuid；}。。。}

Here is my Code from the Dialog 14682 Peripheral(same result status is 3):

ble_uuid_from_string("6e400002-b5a3-f393-e0a9-e50e24dcca9f", &uuid); ble_gatts_add_characteristic(&uuid,GATT_PROP_WRITE, ATT_PERM_RW, 1, 0, NULL, NULL);

With my mobile phone I can write in the characteristic.

Fri, 2020-07-17 10:36

#10

PM_Dialog

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嗨，亚历克斯，

谢谢你的评论，但请提出另一个论坛线程。具体论坛主题与DA14682和SDK1.0.14相关。据我所知，您正在使用DA14585和SDK6在您的设计，所以请创建另一张票与您的问题。

Thanks, PM_Dialog

2020年7月20日星期一16:09

#11

PM_Dialog

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Hi hdr,

Thansk fro gettign back. Could you please provide a BLE sniffer capture/

Thanks, PM_Dialog

周二，2020-07-21 09:36

（回复#11） #12

hdr公司

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Hello,

Hello,
不幸的是，我们不可能嗅探。
We will continue to search for the error and contact you if we find any new information.

Tue, 2020-07-21 16:45

#13

PM_Dialog

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Hi hdr,

Yes please, any further input would be very helpful.

Thanks, PM_Dialog

2020年7月22日星期三16:16

#14

hdr公司

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Hello,

Hello,
Thanks very much for the help. I found my mistake.
我的把柄确实错了。我应该把evt->value\u handle分配给handle\u evt\u gattc\u discover\u char方法中的句柄。

Thank you very much

hdr公司

周四，2020-07-23 14:53

#15

PM_Dialog

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Hi hdr,

Glad that you figured this out and thanks for your indication.

Thanks, PM_Dialog