Forced disconnections when i try to send 50 bytes per second on UART example

[sotillo2409]

Hi everyone,

Explaning my project: an external device transmit via UART to nordik nrf52840DK device with UART peripheal firmware, this is connected to another nrf52840DK via BLE with UART central firmware.

So the peripheal is only working as bridge.

It simply works when i send less than 10 bytes per second, but when I increase the amount of data to more than 30bytes per second i get disconnexions of my peripheal when passed 20-40 seconds. 

I tink that it could be an overload of the UART or an overload of BLE, here my conn_params:

Here the error of disconnection: Disconnected: <log_strdup alloc failed> (reason 8)

Really the objective of the project is send 50-100 bytes every 100msec.

What point i need to check or reconfigure to achieve it??

Thank you,

regards.

[sotillo2409]

Hi,

I have new information,

I take MY peripheral_UART code and put it into an nrf53 with the child image of hr_coded. I connect it to MY custom board with MYCentral_UART code. I connect the external UART to the peripheral nrf53 and is transmitting without problem and no asserts and no reboots.

So i can deduce that my code works, but the configuration of my custom board doesn't work.

This is my board peripheral .defconfig:

# SPDX-License-Identifier: Apache-2.0

CONFIG_SOC_SERIES_NRF52X=y
CONFIG_SOC_NRF52840_QIAA=y
CONFIG_BOARD_HELLO_BOARD=y

# Enable MPU
CONFIG_ARM_MPU=y

# Enable hardware stack protection
CONFIG_HW_STACK_PROTECTION=y

# Enable RTT
CONFIG_USE_SEGGER_RTT=y

# enable GPIO
CONFIG_GPIO=y

# enable uart driver
CONFIG_SERIAL=y

# enable console
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y

# additional board options
CONFIG_GPIO_AS_PINRESET=y

#Fundamental para ext adv on coded
CONFIG_BT_CTLR_PHY_CODED=y
CONFIG_BT_EXT_ADV=y
CONFIG_BT_USER_PHY_UPDATE=y

CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y
CONFIG_BT_CTLR_CONN_RSSI=y
CONFIG_BT_CTLR_ADVANCED_FEATURES=y

I read about CONFIG_FLASH=y and custom boards.

The next test that I am going to do is with a default UART_Central/Peripheral and my custoim board (probably are going to crash).

Any question, test or idea for debug is very welcome,

thank you for the support,

regards.

[sotillo2409]

There are some way to know the Kconfig parameters of the example of UART on SDK ?

Maybe i missed something and copying the original could solve something.

regards.

[sotillo2409]

sotillo2409 said:

The next test that I am going to do is with a default UART_Central/Peripheral and my custoim board (probably are going to crash).

I have tested dfault Central/Peripheral uart SDK example on my custom board and i got this error:

The external UART is connected to peripheral,where the error happen: the address mach with this thread:

As on the past i put up the Stacksize and the error is keeping, so we stay on this point

sotillo2409 said:

Is the default function to do the bridge on UART example

On the other hand if I connect the external UART to the central i get the popular error of BUS FAULT:

So definetly there are some on this custom board that isn't well configured

regards.

[Einar Thorsrud]

Hi,

It does not seem like any of the options in our  board peripheral .defconfig is board specific. Can you comment out all those and introduce one-by-one to see the effect? Or alternatively use the nRF52840 DK board with your custom board, just modify pin configuration for the UART?