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Alex thomas
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Alex thomas
Asked: October 28, 2022In:
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Hii, Is it possible to use the ESP32 VIN pin as a 5V output to power a 5V 2-channel relay for example? And if it’s possible, is it safe? In my design, before I use a 5V power source to power ...Read more

Hii, Is it possible to use the ESP32 VIN pin as a 5V output to power a 5V 2-channel relay for example?
And if it’s possible, is it safe?

In my design, before I use a 5V power source to power the ESP32 and the relay, I want to try out powering both the ESP32 and the relay with the USB port. I know that the ESP32 don’t have a 5V output pin as Arduino does, but I saw some projects using the VIN pin to power a 5V relay, but some other design used different power sources, one 5V for the relay and a USB power source for the ESP32.
So, is it possible or indeed safe to use the VIN pin as a power output?

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arduinoesp32outputusbvin pin
  1. vikas Nagpal

    Suggest you find the circuit diagram for your board, it'll show how the 5V pin is connected to the USB input or you can try to measure the resistance between the 5V pin and USB 5V in with an ohm meter. Still, it all depends on your USB power force and how much you can draw from the 5V pin, If directRead more

    Suggest you find the circuit diagram for your board, it’ll show how the 5V pin is connected to the USB input or you can try to measure the resistance between the 5V pin and USB 5V in with an ohm meter.
    Still, it all depends on your USB power force and how much you can draw from the 5V pin, If direct connected and/ or there are zero ohms.

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dev krishnan
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dev krishnan
Asked: July 26, 2022In:
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Can a .bin compiled/uploaded to an ESP32 from an android? I like to connect my android tablet to an ESP32 via a USB cable (type C on the android side, and USB micro on ESP32 side,) compile a program and upload ...Read more

Can a .bin compiled/uploaded to an ESP32 from an android?

I like to connect my android tablet to an ESP32 via a USB cable (type C on the android side, and USB micro on ESP32 side,) compile a program and upload the result to the ESP32.

I have a separate power supply to the ESP32 using the Vin pin, so power from the android is not needed.

I understand and have used OTA from a laptop, I guess OTA from android might work too (any insight here would be nice, thanks,) but if I hose the code, OTA won’t work and USB will be needed to recover.

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androidesp32otaUSB Cablevin pin
  1. pallavi sharma

    The ESP-IDF codebase plus toolchain are available in ARM Linux flavour, so you could possibly try installing them in a chroot on the tablet. You can install Arduino as an ESP-IDF subcomponent as well if you want to use that API.

    The ESP-IDF codebase plus toolchain are available in ARM Linux flavour, so you could possibly try installing them in a chroot on the tablet.

    You can install Arduino as an ESP-IDF subcomponent as well if you want to use that API.

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