In terms of speed and power consumption, are there differences between xtensa-esp32-elf and arduino compilers?

I've known the slave usually send LTK to the master to encrypt the connection when reconnecting with each bonded devices in the BLE specification. Is what I know wrong?

gatt_security_server is not paired with a peer completely. It does with IOS, but not with android. It looks like to exchange keys but not be recognized each other when reconnecting after bonded. And ESP_GAP_BLE_SEC_REQ_EVT evnet is not received to application. Android recognizes ESP32 as a completel...

publish works well, but subscribe does not work. aws_iot_mqtt_subscribe(&client, SUB_TOPIC, SUB_TOPIC_LEN, QOS0, iot_subscribe_callback_handler, NULL) returns SUCCESS, but iot_subscribe_callback_handler callback function is not called when I publish to topic "1" in the aws iot console. Of course, I ...

I just compiled the ulp example in the esp-idf.

I added ulp compiler to PATH environment variable but, compiler cannot resolve variables of ulp program like below Are these variables added to ulp_main.h automatically?? CC build/main/ulp_example_main.o /Users/joondong/Desktop/ESP-projects/ulp/main/./ulp_example_main.c: In function 'init_ulp_progra...

I posted topic about re-pairing error two days ago.

I know that security request event occurs when bonding devices re-connect, instead of security update and authentication event.

But ESP_GAP_BLE_SEC_REQ_EVT does not occurs always.

I suspect that this may have caused a repair error.

I tried write to characteristic using esp_ble_gatts_ set _attr_value() when ESP_GATTS_WRITE_EVT event received from nRF connect application. But the arrays when creating attribute table(for example, 'heart_ctrl_point' array in the gatt_security_server example) are not changed when I checked using ES...

I tested gatt_security_server example with nRF connect android application. First pairing and bonding succeeded, but re-pairing fails with following message. E (47736) BT: gatts_write_attr_perm_check - GATT_INSUF_ENCRYPTION I did not revise anything in the example and tested with both jelly bean and...

Thank you.