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Iphone & BLE disconnects

http://forum.esp32.com/viewtopic.php?f=2&t=5976

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Iphone & BLE disconnects

Posted: Tue Jun 05, 2018 8:16 am
by Fugazi
Hi

can anyone get BLE to be stable on the iphone, I have posted this in a few places as I am desparate to get this working, managed to get android stable and to run for 20+ hours now, so thats all good, but the Iphone runs for a minute or so and then disconnects.

This is on the BLE UART example aswell.

Thanks to people for developing these libraries however ! :)


Problem comes :-

W (198098) BT_APPL: bta_gattc_conn_cback() - cif=3 connected=0 conn_id=3 reason=0x0008
E (198112) BT_APPL: Unknown connection ID: 4 fail sending notification

Tested using an Iphone 4s , the same thing with a hm10 module works great.

Thanks


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D (197335) GeneralUtils: 0000 12 .
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D (197631) GeneralUtils: 0000 16 .
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D (198075) GeneralUtils: 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f ----------------
D (198075) GeneralUtils: 0000 1c .
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V (198095) FreeRTOS: >> wait: Semaphore waiting: name: ConfEvt (0x3ffe6c2c), owner: notify for notify
W (198098) BT_APPL: bta_gattc_conn_cback() - cif=3 connected=0 conn_id=3 reason=0x0008
E (198112) BT_APPL: Unknown connection ID: 4 fail sending notification
V (198118) FreeRTOS: Semaphore giving: name: ConfEvt (0x3ffe6c2c), owner: notify
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Re: Iphone & BLE disconnects

Posted: Tue Jun 05, 2018 1:14 pm
by JoaoLopesF
Hi,

In my project, I use pcbreflux ble_uart_server and based on Nordic examples, to make the Esp32 firmware and Android and iOS app.

In my case, testing with iPhone 5, it had a higher performance and stability than Android 7.1.

To help you, please give us more details:

- Is your Esp-IDF code based on ?
- Is your iOS code also based on ?
-You can test with latest iPhone, at least iPhone 5, to check if it's something with the iPhone 4?

Re: Iphone & BLE disconnects

Posted: Tue Jun 05, 2018 9:50 pm
by Fugazi
Hi

Thanks for the reply, am really stuck on this one.

Latest espidf code and arduino code off the site as of a week ago

Running the BLE UART example from the arduino libaries.

Tried Iphone 4S, 6 and X

Used several different BLE scanners and applications, same in all.

Will try that uart example you mention... if i can get it to compile ;)

Thanks

Re: Iphone & BLE disconnects

Posted: Wed Jun 06, 2018 11:05 am
by Fugazi
OK compiles now

I guess I am supposed to send the notifiocations through :-

void char2_notify_handle(esp_gatt_if_t gatts_if, uint16_t conn_id) ?

However not sure where to get the variables esp_gatt_if_t gatts_if, uint16_t conn_id from ?

Any ideas?

Thanks

Re: Iphone & BLE disconnects

Posted: Wed Jun 06, 2018 2:24 pm
by JoaoLopesF
Hi,

I suggest the nRF Toolbox App of Nordic to test Ble comunications, especifically UART, its is very good,
and have code in github and an Ble Library to Android and iOS

*** ble_uart_server (by pcbreflux)

*** Send (by esp_ble_gatts_send_indicate)

Code: Select all

esp_ble_gatts_send_indicate(mGatts_if, 0, gl_char[1].char_handle,
			size, (uint8_t*) data, false);
*** Receive (this function I changed)
I use callbacks to C++ class, but I put here a simple call to a function to process the data

Code: Select all


static void char1_write_handler(esp_gatts_cb_event_t event,
		esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param) {
	DEBUG("char1_write_handler %d", param->write.handle);

	if (gl_char[0].char_val != NULL) {
		DEBUG("char1_write_handler char_val %d",param->write.len);
		gl_char[0].char_val->attr_len = param->write.len;
		for (uint32_t pos = 0; pos < param->write.len; pos++) {
			gl_char[0].char_val->attr_value[pos] = param->write.value[pos];
		} DEBUG("char1_write_handler %.*s", gl_char[0].char_val->attr_len, (char*)gl_char[0].char_val->attr_value);
	} DEBUG(" char1_write_handler esp_gatt_rsp_t");
	esp_ble_gatts_send_response(gatts_if, param->write.conn_id,
			param->write.trans_id, ESP_GATT_OK, NULL);

	// Changed -> after send_response

	if (gl_char[0].char_val != NULL && gl_char[0].char_val->attr_len > 0) { // Read ;-)

		// Call function
				
		bleRecData((char*) gl_char[0].char_val->attr_value,
					(uint8_t) gl_char[0].char_val->attr_len);
		
		
	}
}

Code: Select all


static void bleRecData(char *data, uint8_t size) { 

	// Received  data by BLE notification

	char aux[size + 1];
	sprintf(aux, "%.*s", size, data);

	ESP_LOGV(TAG_BLE, "*** BLE receb [%d]:%s", size, aux);

        // Process the data .....

}
I hope this helps you

Re: Iphone & BLE disconnects

Posted: Wed Jun 06, 2018 6:22 pm
by Fugazi
Nearly :)

I worked out the receive, the send variables in the send_indicate I am kinda stuck where to get them from?

esp_ble_gatts_send_indicate(mGatts_if, 0, gl_char[1].char_handle,
size, (uint8_t*) data, false);

Where do you get the mGatts_if variable from ?

Something like esp_gatt_if_t gatts_if_for_indicate = ESP_GATT_IF_NONE;?

Is there a full example code anywhere ? :)


thanks again

Re: Iphone & BLE disconnects

Posted: Thu Jun 07, 2018 8:30 am
by Fugazi
Cant get anything to notify still

esp_ble_gatts_send_indicate(gl_profile.gatts_if, gl_profile.conn_id, gl_char[1].char_handle,1,&notify_pos,false); ?

Is these the parameters to be used ? thanks

Re: Iphone & BLE disconnects

Posted: Thu Jun 07, 2018 10:15 am
by osx1000
Hi, off topic: Are you developing under macOS?

Jörg

Re: Iphone & BLE disconnects

Posted: Thu Jun 07, 2018 9:41 pm
by JoaoLopesF
Hi,

I not tested use of gl_profile.gatts_if, maybe works
I use an global variable for it:

Code: Select all

static esp_gatt_if_t mGatts_if = ESP_GATT_IF_NONE;
And change the event:

Code: Select all

case ESP_GATTS_CONNECT_EVT:
		DEBUG("SERVICE_START_EVT, conn_id %d, remote %02x:%02x:%02x:%02x:%02x:%02x:, is_conn %d",
				param->connect.conn_id,
				param->connect.remote_bda[0], param->connect.remote_bda[1], param->connect.remote_bda[2],
				param->connect.remote_bda[3], param->connect.remote_bda[4], param->connect.remote_bda[5],
				param->connect.conn_id);
		gl_profile.conn_id = param->connect.conn_id;

		/// BLE

		mGatts_if = gatts_if;

Re: Iphone & BLE disconnects

Posted: Fri Jun 08, 2018 6:47 am
by Fugazi
Hi

Thanks, i just needed to reboot the iphone, it was being daft, it works now, thanks for all the help.

Unfortunately this does exactly the same as the arduino example.

If you have 5 minutes spare try sending one byte every 50ms.... it runs for about one minute and then the iphone disconnects with

(14321) BT_APPL: bta_gattc_conn_cback() - cif=3 connected=0 conn_id=3 reason=0x0008

So still not working.

:(
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