Search found 83 matches

by username
Fri Apr 12, 2019 11:19 am
Forum: General Discussion
Topic: Help! ESP32 burnt by Motor Drive Module.
Replies: 13
Views: 955

Re: Help! ESP32 burnt by Motor Drive Module.

Thanks. I will try that. Could you tell me the physics theory of the small resistor? Do they protect the ESP32 from shortcut or something else? resistors limit current. the higher the value the more they limit. For example, if you set a GPIO pin high, but that pin is shorted to gnd for whatever rea...
by username
Tue Apr 09, 2019 2:25 pm
Forum: General Discussion
Topic: is there any issue using io0/io4 for i2c?
Replies: 7
Views: 619

Re: is there any issue using io0/io4 for i2c?

Not sure, Personally I steer clear of using GPIO0. Throw a scope on the SCL/SDA lines and have a look.
by username
Tue Apr 09, 2019 12:10 pm
Forum: General Discussion
Topic: Help! ESP32 burnt by Motor Drive Module.
Replies: 13
Views: 955

Re: Help! ESP32 burnt by Motor Drive Module.

its possible. Another option to try on a new motor driver board to help is to put a 100 or 220 Ohm resistor in series with your 2 control wires and PWM wire to your driver board.
by username
Tue Apr 09, 2019 12:08 pm
Forum: General Discussion
Topic: is there any issue using io0/io4 for i2c?
Replies: 7
Views: 619

Re: is there any issue using io0/io4 for i2c?

IO0 is a special pin that already has a pullup on it. Its used to program the part. I suggest looking at the data sheet first so you can understand what pins to use and not to.
by username
Tue Apr 09, 2019 1:01 am
Forum: General Discussion
Topic: Help! ESP32 burnt by Motor Drive Module.
Replies: 13
Views: 955

Re: Help! ESP32 burnt by Motor Drive Module.

It all depends on how far it crashes. Best way is to protect the outputs from the ESP32
by username
Mon Apr 08, 2019 2:54 pm
Forum: General Discussion
Topic: Help! ESP32 burnt by Motor Drive Module.
Replies: 13
Views: 955

Re: Help! ESP32 burnt by Motor Drive Module.

I have used this one, may not be what your looking for but it could prove out the issue because it has opto Isolators as inputs to protect your device.
https://www.amazon.com/gp/product/B078T ... UTF8&psc=1
by username
Mon Apr 08, 2019 11:20 am
Forum: Hardware
Topic: Differents boards, differents reads of ADC !?!?!?!?
Replies: 5
Views: 549

Re: Differents boards, differents reads of ADC !?!?!?!?

Describe what your measuring with your A/D pin and anything attached to that pin.
by username
Mon Apr 08, 2019 2:02 am
Forum: General Discussion
Topic: Help! ESP32 burnt by Motor Drive Module.
Replies: 13
Views: 955

Re: Help! ESP32 burnt by Motor Drive Module.

There is something that does not make sense here. I have done exactly the same thing as you. Not using the exact same parts mind you. But basically the same motor driver and motor. I never had a issue when I would reverse the motor direction. The control lines and PWM signal are input only to the mo...
by username
Sun Apr 07, 2019 1:13 pm
Forum: General Discussion
Topic: Help! ESP32 burnt by Motor Drive Module.
Replies: 13
Views: 955

Re: Help! ESP32 burnt by Motor Drive Module.

What would be more helpful it is give links to the exact modules you are using. And also what pins you have connected to them.
by username
Fri Apr 05, 2019 6:09 pm
Forum: General Discussion
Topic: RTOS running on one core only
Replies: 24
Views: 1638

Re: RTOS running on one core only

But: polling an input-pin with CoopOS is much faster
Just curious why you would pole an input-pin rather than set a IRQ for it.

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