Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

seanbites — Thu, 02 Jun 2016 14:00:38 GMT

We are developing a product which is supposed to work with all cell phones, so an issue with one model is to be considered serious. we will be doing our own tests as soon as we can on this model.

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

Vincent — Thu, 02 Jun 2016 01:59:22 GMT

Yesterday I used the Samsung S7 test DFU app function. Today I use IPhone6 Plus test the DFU and The timing setting like below: #define MIN_CONN_INTERVAL (uint16_t)(MSEC_TO_UNITS(15, UNIT_1_25_MS))
#define MAX_CONN_INTERVAL (uint16_t)(MSEC_TO_UNITS(100, UNIT_1_25_MS)) Other conditions is same with yesterday.

The result is very much better then my Samsung S7. Timout error occur frequently just 1~2 in 10 time. So I think the problem maybe is the Cell phone and Sorry to waste your time. and the DFU funs is good. yo... check it out.

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

Vincent — Wed, 01 Jun 2016 13:27:13 GMT

Ok,thanks.

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

seanbites — Wed, 01 Jun 2016 13:04:54 GMT

Let me see if I can`t reproduce your bug with a similar phone. We have not had any issues with the above settings for nexus 5 or several models of iphones.

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

Vincent — Wed, 01 Jun 2016 12:52:00 GMT

Sorry the SD is s132_nrf52_2.0.0_softdevice.hex

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

Vincent — Wed, 01 Jun 2016 12:49:21 GMT

I use Android OS. If I set the timing like below the update speed is good but 6~7 in 10 time the app will show the gatt conn timeout error message. #define MIN_CONN_INTERVAL (uint16_t)(MSEC_TO_UNITS(15, UNIT_1_25_MS)) #define MAX_CONN_INTERVAL (uint16_t)(MSEC_TO_UNITS(100, UNIT_1_25_MS))

If I set the timing like below. The update speed is slow but 2~3 in 10 time app show the gatt conn timeout #define MIN_CONN_INTERVAL (uint16_t)(MSEC_TO_UNITS(15, UNIT_1_25_MS)) #define MAX_CONN_INTERVAL (uint16_t)(MSEC_TO_UNITS(500, UNIT_1_25_MS))

I use the example code hrs ble will error every time. If I use the example code csc ble just few time will show the timeout error MCU: nRF52832 SDK: 11 Project: ble_peripheral ble_app_cscs and ble_app_hrs Cell Phone: samsung s7 OS: Android App: nRFToolbox FW: I did nRFutil to make application to zip file

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

seanbites — Wed, 01 Jun 2016 12:38:19 GMT

Could you elaborate on what you mean by "not stable"? Also what is your central device and what OS is it running (in the case it is a smartphone)?

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

Vincent — Wed, 01 Jun 2016 03:52:52 GMT

I use nRF52832 SD132 and I set the time like this #define MAX_CONN_INTERVAL (uint16_t)(MSEC_TO_UNITS(100, UNIT_1_25_MS)) which is not stable. If I set the time is #define MAX_CONN_INTERVAL (uint16_t)(MSEC_TO_UNITS(500, UNIT_1_25_MS)) which is too slow. Does there has any better way to do.

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

bjorn-spockeli — Thu, 14 Jan 2016 08:31:46 GMT

Could you mark the answer as correct @seanbites?

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

seanbites — Wed, 13 Jan 2016 16:45:07 GMT

MAX_CONN_INTERVAL (uint16_t)(MSEC_TO_UNITS(100, UNIT_1_25_MS)) works well and the uploading of the code is not excessively slow. cheers!

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

seanbites — Wed, 13 Jan 2016 16:34:21 GMT

Haleluia! Thanks a lot for your help! I changed the parameters in dfu_transport_ble.c to

#define MIN_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(15, UNIT_1_25_MS)) 
#define MAX_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(500, UNIT_1_25_MS))

which is brute force and I'm going to have to figure out the optimal values for them so that the uploading is not so slow.

Update:

The following connection interval parameters works well

#define MIN_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(15, UNIT_1_25_MS)) 
#define MAX_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(100, UNIT_1_25_MS))

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

seanbites — Wed, 13 Jan 2016 14:06:31 GMT

I'll do so and come back with the results!

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

bjorn-spockeli — Wed, 13 Jan 2016 10:02:47 GMT

Try setting the "Packet Receipt Notification" in the nRF Toolbox app to 1 instead of 10. If that does not solve the issue you can try to increase the connection interval in dfu_transport_ble.c from

#define MIN_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(15, UNIT_1_25_MS)) 
#define MAX_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(30, UNIT_1_25_MS))

#define MIN_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(30, UNIT_1_25_MS)) 
#define MAX_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(50, UNIT_1_25_MS))

RE: Getting a "GATT CONN TIMEOUT" message when trying to upload a new firmware via BLE DFU

seanbites — Tue, 12 Jan 2016 19:10:10 GMT

I have used an Iphone 6 to upload a code, and it worked without a hitch. I believe that the nexus 5 phones have a known issue. If anybody has a list of devices with known issues, I would be grateful!