ESP-WROVER-KIT will not reset

timredfern
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Joined: Sun Feb 25, 2018 10:59 am

ESP-WROVER-KIT will not reset

Postby timredfern » Wed Mar 21, 2018 3:22 pm

Pressing the button marked EN is supposed to reset the ESP-WROVER-KIT.. however it doesn't work on mine (V3).

I can see on the schematic a circuit with 2 transistors and DTR/RTS which I think is UART 0.

Is anyone else having this problem? Very inconvenient.

Tim

WiFive
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Re: ESP-WROVER-KIT will not reset

Postby WiFive » Thu Mar 22, 2018 4:23 am

Have you checked the button itself with an ohmmeter?

timredfern
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Re: ESP-WROVER-KIT will not reset

Postby timredfern » Thu Mar 22, 2018 11:06 am

The button seems fine.

I'm reading 1 ohm closed, 14 k ohm open (presume the open reading is from the rest of the circuit, rather than the switch itself)

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kolban
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Re: ESP-WROVER-KIT will not reset

Postby kolban » Thu Mar 22, 2018 2:03 pm

I'm likely way off base here ... but aren't there two buttons? One labeled boot and the other EN. It is my loose thinking that it is the boot button which causes the ESP32 to restart and the EN button defines a boolean flag that can be read at boot time to allow the ESP32 to know which mode to boot up into. I'm not sure it actually means anything to press the EN button when the ESP32 is running. What do we think pressing EN by itself should actually do?
Free book on ESP32 available here: https://leanpub.com/kolban-ESP32

timredfern
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Re: ESP-WROVER-KIT will not reset

Postby timredfern » Thu Mar 22, 2018 2:29 pm

https://dl.espressif.com/doc/esp-idf/la ... r-kit.html

EN
Reset button: pressing this button resets the system.
Boot
Download button: holding down the Boot button and pressing the EN button initiates the firmware download mode. Then user can download firmware through the serial port.

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fly135
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Re: ESP-WROVER-KIT will not reset

Postby fly135 » Thu Mar 22, 2018 6:48 pm

Just tried pressing the EN button on my ESP-WROVER-KIT and it caused a reboot.

John A

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loboris
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Re: ESP-WROVER-KIT will not reset

Postby loboris » Thu Mar 22, 2018 7:20 pm

Sometimes, if the sdcard is inserted and was used, the reset button (EN) may not work.

timredfern
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Re: ESP-WROVER-KIT will not reset

Postby timredfern » Fri Mar 23, 2018 2:10 pm

I don't have an SDcard mounted.

Is my ESP-WROVER-KIT faulty?

timredfern
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Re: ESP-WROVER-KIT will not reset

Postby timredfern » Tue Mar 27, 2018 9:50 am

I see this viewtopic.php?t=1655#p7748

"Also I have worked out that my EN/Reset button doesn't seem to work unless I have a serial connection open, very weird. I did read that there was an issue with some of the boards with the EN button, looks like mine is one of them."

Any way to identify the boards with this issue?

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