Questions tagged [esp32]
For questions about the ESP32 series of microcontrollers. Use in conjunction with the "microcontroller" tag.
1,321 questions
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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 ...
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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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Why does ESP32 smooth a 10us square wave?
I am generating a square wave using a CMOS chip running at 12 volts, the time period is 10us, I can see the square wave is perfect on the scope.
Now when the square wave is sent to ESP32 using a ...
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Tacho Simulator with ESP32 and IRFZ44N
I'm new to working with MOSFETs and PWM. My goal is to simulate the signal that the ECU sends to the car tachometer, to check if it is working properly in a bench environment.
The tachometer uses 3 ...
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Power delivery and USB data in HUSB238 type c controller
I'm designing a device that utilizes the Hynetek HUSB238 to control the type C usb connector that powers the whole thing. Now, I have a prototype that works well, but I'd like to use the same ...
