Calling esp_ble_gattc_open results in a GATTS connection event?

[MrSurly]

I'm registering two apps, a GATTS and GATTC, which results in two different interfaces:

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network_bluetooth_gap_event_handler(event = 0E / LOCAL_IR, param = ()
network_bluetooth_gatts_event_handler(event = 00 / REG, if = 04, param = (status = 00 / OK, app_id = 0000)
network_bluetooth_gattc_event_handler(event = 00 / REG, if = 05, param = (status = 00 / OK, app_id = 0001)
network_bluetooth_gap_event_handler(event = 0F / LOCAL_ER, param = ()

As you can see, two different interfaces for GATTS and GATTC.

Code in question is here: https://github.com/MrSurly/micropython- ... 4865b4e506, part of adding BLE to MicroPython.

When I call esp_ble_gattc_open(<if>, <adx>, true), I get an ESP_GATTC_OPEN_EVT (this is expected), but I also get an ESP_GATTS_CONNECT_EVT, which is not:

The relevant commands entered, without the logging cruft :

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>>> import network as n
>>> b = n.Bluetooth()
>>> conn = b.connect(bytearray(b'\x00\x22\xd0\xcc\xe9\x97'))

The address for the connect is for a Polar H7 heart rate monitor.

Full text

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MicroPython v1.8.6-1138-g71fae46-dirty on 2017-05-05; ESP32 module with ESP32
Type "help()" for more information.
>>> import network as n
I (35121) wifi: wifi firmware version: a8ef40a
I (35121) wifi: config NVS flash: enabled
I (35121) wifi: config nano formating: disabled
I (35131) wifi: Init dynamic tx buffer num: 32
I (35131) wifi: wifi driver task: 3ffb48bc, prio:23, stack:3584
I (35131) wifi: Init static rx buffer num: 10
I (35131) wifi: Init dynamic rx buffer num: 0
I (35141) wifi: Init rx ampdu len mblock:7
I (35141) wifi: Init lldesc rx ampdu entry mblock:4
I (35151) wifi: wifi power manager task: 0x3ffdfbf4 prio: 21 stack: 2560
I (35151) wifi: wifi timer task: 3ffdfd64, prio:22, stack:3584
I (35181) phy: phy_version: 350, Mar 22 2017, 15:02:06, 0, 0
I (35181) wifi: mode : null
>>> b = n.Bluetooth()
BT is deinit, initializing
BTDM CONTROLLER VERSION: 010101
BTDM ROM VERSION 0101
BD_ADDR: 24:0A:C4:05:7E:E6
NVDS MAGIC FAILED
RF Init OK with coex
Enable Classic BT
Enable Low Energy
E (35361) BT: Startup BTU

E (35361) BT: GATTS_CreateService:  handle of service handle1
E (35371) BT: bta_dm_co_ble_load_local_keys: func not ported

>>> network_bluetooth_gap_event_handler(event = 0E / LOCAL_IR, param = ()
network_bluetooth_gatts_event_handler(event = 00 / REG, if = 04, param = (status = 00 / OK, app_id = 0000)
network_bluetooth_gattc_event_handler(event = 00 / REG, if = 05, param = (status = 00 / OK, app_id = 0001)
network_bluetooth_gap_event_handler(event = 0F / LOCAL_ER, param = ()
conn = b.connect(bytearray(b'\x00"\xd0\xcc\xe9\x97'))
>>> E (40171) BT: smp_br_connect_callback is called on unexpected transport 2

network_bluetooth_gatts_event_handler(event = 0E / CONNECT, if = 04, param = (conn_id = 0000, remote_bda = 00:22:D0:CC:E9:97, is_connected = true)
network_bluetooth_gattc_event_handler(event = 02 / OPEN, if = 05, param = (status = 00 / OK, conn_id = 0000, addr = 00:22:D0:CC:E9:97, mtu = 0017)
network_bluetooth_gap_event_handler(event = 08 / AUTH_CMPL, param = ()
network_bluetooth_gap_event_handler(event = 08 / AUTH_CMPL, param = ()