umqtt/simple (connect)

Trying to run an example, came by: https://github.com/GoogleCloudPlatform/iot-core-micropython

It stops here:

Creating JWT...
Sending message with password eyJ0eXAiOiAiSl
[...] JWId1Qjmb4BjjKHPLITppMbzo1FDBigdmqmw_CwUQXjB2mUyRX8QcUw6ApvZTP98yfrc7gP0lc5eQmVZR0xsSmBlJM_iGJp1vJhkwirpIeXgnILO9w==
Traceback (most recent call last):
File "main.py", line 190, in
File "main.py", line 170, in get_mqtt_client
File "umqtt/simple.py", line 97, in connect
IndexError: bytes index out of range
MicroPython v1.12 on 2019-12-20; ESP32 module with ESP32

and can't conclude de connection, any suggestion of what can be?

follow line 190 in main.py:

client = get_mqtt_client(config.google_cloud_config['project_id'], config.google_cloud_config['cloud_region'], config.google_cloud_config['registry_id'], config.google_cloud_config['device_id'], jwt)

I think the problem is about umqtt/simple.py

Inizia da umqtt/simple.py alla riga 97 e dalla chiamata a get_mqtt_client in main.py alle righe 170 e 190. Riproduci il tentativo di connessione su MicroPython v1.12 con l’esempio ESP32, quindi traccia il bytes index error. Il lavoro è completo quando l’esempio completa la connessione MQTT senza l’eccezione e la causa e la verifica sono documentate.