Wei Miao
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Wei Miao
@per1234 No, I don't have `while (!Serial)` in my code. The code will run and it stops when establishing the MQTT connection.
The [Pubsubclient ](https://pubsubclient.knolleary.net/) works with a battery. I don't understand why this library requires the serial connection to work.
@hcorn82 From my test, I found it may also be related to the computer or the driver. Try downloading the code to Arduino on a different computer, or try the...