Questions tagged [esp32]
For questions about the ESP32 series of microcontrollers. Use in conjunction with the "microcontroller" tag.
1,323 questions
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Doorlock ESP32 schematic and PCB design for beginner [closed]
The idea of the project is a door lock with RFID, keypad and open using app; it also has a button KEY1 to open from the inside.
I use a 12.6 V 3 S charger through DC1 jack.
I want to make sure the ...
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Is there a way to connect about 6 I2S devices to an ESP32?
I'm trying to connect I2S microphones to an ESP32, but it seems to support a maximum of only two.
Is there any way to achieve that?
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How long does a ds3231 rechargeable battery last without charging
I've built a (bird) sound record around an ESP32 with a DS3231 RTC for accurate time stamping. The recorder goes into deep sleep mode when not actually recording, which is typically set to 3 minutes ...
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Why is the on-board LED of the ESP32 Blue?
Context
I know this might be a silly question but, according to this page the typical voltage drop for a blue LED is between 3V and 3.7V. A couple of weeks ago when I was designing an LED resistor ...
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How to properly drive an N-Channel mosfet with an ESP32
Note: sorry, I don't have a lot of experience, so I don't know what information is fully relevant. So for the specific question go to "Questions". Before, I give a bit of context if you want ...
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How Do ESP-Based Devices Auto Switch Power Input?
I've been exploring LED drivers that are based off of ESP32s and other ESP chips. Many of them allow for 5v/12v/24v auto-switching input. I'm curious, how do these devices reliably power the ESP ...
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How to use an ESP32, a digital potentiometer, and a MOSFET+optoisolator board to remotely control a 3–5.5 V, 50–100 µA circuit?
I’m trying to add remote control to an existing low-power circuit.
Between two contacts (labeled 6 and 7 in my schematic), there’s a voltage ranging from 3 V to 5.5 V and a current between 50 µA and ...
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ESP32 (TTGO T-Beam) I2S Stereo Mic Setup (ICS-43434) Reads Consistent Zeroes
I am kind of new in the field and I am attempting to set up a stereo I2S microphone array using two ICS-43434 MEMS microphones on an ESP32 TTGO T-Beam board. My code successfully compiles and runs, ...
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How to control PA and LNA for FEM in custom RF module?
I am working on a custom RF module. This is my first experience. If you know of a book or resource on this subject, I would appreciate your guidance. So far I want to use an SOC with built in RF (ESP)....
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ESP32 S3 N16R8 custom board USB Port is not detecting
I am having a rough day because I made a custom board using the ESP32 S3 N16R8, but when I tested it, its USB-C port is not recognized by my laptop.
I am trying to troubleshoot an ESP32. The 3V3 pin ...
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Does this work -> MicroROS & Zephyr RTOS on ESP32?
I am working into Micro_ROS, and the only board lying around was an ESP32.
So I started with Zephyr RTOS. I was trying to build the demo app like ping pong for my esp board, but the CMake files say ...
user602198
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How to power RGB LED Strip with ESP32-S3 microcontroller on breadboard?
I am trying to use my ESP32-S3-DevKitC-1 microcontroller to power RGB addressable LEDs via the ESP-IDF 5.5 Command Prompt, but I am not able to power on the LEDs. I have tested the microcontroller ...
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Meaning of "High first-out"
I'm a beginner in embedded programing. I want to play with ESP32 and the DHT11 to read the temperature of a room.
The DHT11 Datasheet said:
DATA is used for communication between the microprocessor ...
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Problem with SF800 flow sensor reading
I am having a problem with my flowsensor circuit as show in the figure.
where SF800 is the flow sensor I am using. It's a pulse sensor PNP/NPN contact. Hence the pulse signal pin in pull up using a 2....
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CAN bus network compatibility issue with certain diagnostic scanners [closed]
I have a custom CAN bus network consisting of two nodes. The nodes are a MCP2515/TJA1050 boards which are powered by 5 V, and are driven by the SPI protocol at 3V3 from an ESP32.
When I connect a PLX ...
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