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by dmaxben
Fri Nov 17, 2017 6:00 pm
Forum: ESP32 Arduino
Topic: ESP32 boot time with Arduino
Replies: 5
Views: 5196

Re: ESP32 boot time with Arduino

Ok I did some simple tests with the ESP32 hooked up to an Arduino Due.

It looks like the boot time from off to setting the GPIO-18 high is 517ms? Does that sound right? Seems awful slow...... half a second for the ESP32 to boot????
by dmaxben
Fri Nov 17, 2017 4:15 pm
Forum: ESP32 Arduino
Topic: ESP32 boot time with Arduino
Replies: 5
Views: 5196

Re: ESP32 boot time with Arduino

This is not exactly answer on you question, but i think you may be interested. ESP32 has deep sleep mode and can be wake up by signal on gpio and ready to work faster than you need. http://esp-idf.readthedocs.io/en/v2.1/api-reference/system/deep_sleep.html?highlight=deep%20sleep http://esp-idf.read...
by dmaxben
Fri Nov 17, 2017 3:54 pm
Forum: General Discussion
Topic: SPI pullups, INT pin question
Replies: 2
Views: 3140

SPI pullups, INT pin question

Hi everyone... Im designing a custom PCB using the ESP32-WROOM-32. I did some searching but couldnt find the answer I was looking for regarding the IO-MUX. I read the datasheet and the IO-MUX wasnt 100% clear on a couple things. This will be using the ESP32 interfaced to an MCP2515 CAN transceiver u...
by dmaxben
Fri Nov 17, 2017 3:27 pm
Forum: ESP32 Arduino
Topic: Holding digital pins state in sleep mode
Replies: 2
Views: 1726

Re: Holding digital pins state in sleep mode

Figured I would bump this back up to the top....is it possible to hold a pin "high" while sleeping?
by dmaxben
Thu Nov 16, 2017 6:31 pm
Forum: ESP32 Arduino
Topic: ESP32 boot time with Arduino
Replies: 5
Views: 5196

ESP32 boot time with Arduino

Hi everyone...not new to Arduino, but new to the ESP32...very excited about working with it! Quick question I had, how quickly can the ESP32 go from initial power on (ie, applying 3.3v) to setting a GPIO "high"? The reason I ask, is because I have an external CAN transceiver that automatically contr...

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