nrf mesh Softdevice assert: 88996:0

RE: nrf mesh Softdevice assert: 88996:0

Hung Bui — Mon, 22 Feb 2021 10:30:46 GMT

Hi,

It's pretty strange that changing the tx_power in mesh can cause a softdevice assert.
I tried to test the same but I couldn't reproduce the issue. If you test on light switch example do you see the same problem ?

Also I don't think changing the TX_POWER in scanner.c would have any effect. Could you please test with only modification in advertiser.c ?

In addition, could you verify that if you change the TX_POWER back to 0dbm the problem will disappear ?

RE: nrf mesh Softdevice assert: 88996:0

Oleh — Sun, 21 Feb 2021 10:16:01 GMT

we modified two files: advertiser.c and scanner.c

as follows:

RE: nrf mesh Softdevice assert: 88996:0

ipshiv — Sun, 21 Feb 2021 07:07:40 GMT

static inline void set_default_broadcast_configuration(broadcast_t * p_broadcast)

{

p_broadcast->params.access_address = BEARER_ACCESS_ADDR_DEFAULT;

p_broadcast->params.radio_config.payload_maxlen = RADIO_CONFIG_ADV_MAX_PAYLOAD_SIZE;

p_broadcast->params.radio_config.radio_mode = RADIO_MODE_BLE_1MBIT;

p_broadcast->params.radio_config.tx_power = RADIO_POWER;

}

RADIO_POWER dafines at compilation. For tests neg12, for production pos8

RE: nrf mesh Softdevice assert: 88996:0

ipshiv — Sun, 21 Feb 2021 07:07:40 GMT

static inline void set_default_broadcast_configuration(broadcast_t * p_broadcast)

{

p_broadcast->params.access_address = BEARER_ACCESS_ADDR_DEFAULT;

p_broadcast->params.radio_config.payload_maxlen = RADIO_CONFIG_ADV_MAX_PAYLOAD_SIZE;

p_broadcast->params.radio_config.radio_mode = RADIO_MODE_BLE_1MBIT;

p_broadcast->params.radio_config.tx_power = RADIO_POWER;

}

RE: nrf mesh Softdevice assert: 88996:0

Hung Bui — Thu, 18 Feb 2021 12:56:57 GMT

Hi Ivan,

Could you show how you change the TX Power in advertiser.c and scanner.c ?
Could you verify if you remove those change the device works stably for a long time ?

RE: nrf mesh Softdevice assert: 88996:0

ipshiv — Thu, 18 Feb 2021 01:36:23 GMT

Good day!

We've configured prio according to link. With only one difference: app timer works without scheduler (only mesh events use it). This gives us better performance during provisioning.

Peripherals: TWI (APP_IRQ_PRIO_HIGH), UARTE (APP_IRQ_PRIO_LOW).

The problem occurred after switching to negative tx power in advertiser.c and scanner.c

RE: nrf mesh Softdevice assert: 88996:0

Hung Bui — Wed, 17 Feb 2021 15:38:23 GMT

Hi Oleh,

I assume you are using S140 v7.2.0 ?

The softdevice error 88996 suggests that it's a RADIO interrupt issue. Could you give some more information about your application ?
I would suggest to try testing remove functionalities (reduce any traffic) and gradually add them back to see at which point the assert occurs.
Have you made sure you followed the priority configuration described here ?