Search found 6 matches

by connor
Fri Jan 26, 2018 11:39 pm
Forum: General Discussion
Topic: Post Reflow Cleaning Recommendation for ESP-WROOM-32?
Replies: 1
Views: 3505

Re: Post Reflow Cleaning Recommendation for ESP-WROOM-32?

Does anybody know how to help with this question?

Surely there is a specification from Espressif whether to wash boards after reflow, or to use no-clean solder paste...

Thank you,
Connor
by connor
Wed Jan 24, 2018 9:40 pm
Forum: General Discussion
Topic: Post Reflow Cleaning Recommendation for ESP-WROOM-32?
Replies: 1
Views: 3505

Post Reflow Cleaning Recommendation for ESP-WROOM-32?

Hello,

After re-flow soldering, what does ESP recommend as the cleaning/washing process?

Is it OK to wash this part, or do we need to use no-clean solder paste?

Thanks,
Connor
by connor
Tue Nov 14, 2017 10:49 pm
Forum: Hardware
Topic: ESP-WROOM-32 ADC VREF Calibration
Replies: 1
Views: 4619

ESP-WROOM-32 ADC VREF Calibration

Hello, Regarding the ESP 32 ADC VREF issues, is VREF currently being measured at the factory and burned into the efuse? Here is a quote from igrr on GitHub: "Large scale: new chips produced starting from (some date)(1) will have their V_REF burned into efuse at production. Calibration code will auto...
by connor
Mon Oct 02, 2017 5:42 pm
Forum: Hardware
Topic: ESP-WROOM-32 Bootstrapping
Replies: 5
Views: 9503

Re: ESP-WROOM-32 Bootstrapping

Great, thanks very much!

-Connor
by connor
Sat Sep 30, 2017 9:01 pm
Forum: Hardware
Topic: ESP-WROOM-32 Bootstrapping
Replies: 5
Views: 9503

Re: ESP-WROOM-32 Bootstrapping

1. It's only used in SDIO boot mode, which is a mode where the ESP32 does not boot from external flash but from its SDIO interface; a host machine should send it data. Because there's no firmware running at that moment, the configuration has to be done using bootstrap pins. 2. If the flash voltage ...
by connor
Fri Sep 29, 2017 6:43 pm
Forum: Hardware
Topic: ESP-WROOM-32 Bootstrapping
Replies: 5
Views: 9503

ESP-WROOM-32 Bootstrapping

Hello, I've got a few questions relating to the bootstrapping pins on the ESP module. Specifically: 1) What is the purpose of the "timing of SDIO slave" strapping pins? I am guessing that the state of these doesn't really matter as it can also be configured in FW. But how can the flash memory proper...