All Questions
31
questions
1
vote
0
answers
43
views
ESP32-C3-MINI-1-N4: can't establish Serial connection but can flash code
I've recently build my own dev board utilizing the ESP32-C3-MINI-1-N4 module. Everything works pretty well and just as expected, I can control a few onboard LEDs just fine and upload code and ...
- 11
0
votes
2
answers
105
views
Why does RS-232 Communication fail between these 3 ESP32's?
What's the Goal?
Trying to get two esp32's to communicate over their UART lines using RS-232.
My initial inspiration and idea for the connections was based on
https://esp32io.com/tutorials/esp32-rs232
...
- 117
0
votes
1
answer
54
views
WiFi connectivity ceases on ESP32 when MAX3232 is powered on the same board
Since my issue could be lying anywhere, I will explain my design details a bit.
I have a 4-layer PCB. The stackup is Top-GND-PWR-Bottom.
...
- 273
0
votes
1
answer
353
views
ESP32-CAM flash via UART
I'm looking for help to upload from Arduino IDE into an ESP32-CAM module, without an FTDI programmer or shield.
Context
I've got a couple of ESP32-CAM modules with an associated ESP32-CAM-MB shield ...
- 3
0
votes
0
answers
276
views
ESP32-S3 USB Serial is read-only
I have a ESP32-S3-DevKitC-1 board. It has two USB ports, one connected to a USB to UART chip (brigde), the other connected to SoC directly (USB Serial).
The USB Serial is much faster than bridge for ...
-1
votes
1
answer
271
views
Low-Voltage Differential Signalling (LVDS) not working
I have updated the schematic and hopefully included all the suggestions.
The problem of the LED strip flickering is still there, however, I have noticed a slight improvement after altering the circuit ...
- 1
0
votes
1
answer
525
views
MAX3362 RS485 IC connection with ESP32
I am using MAX3362 RS485 serial data transfer IC with ESP32. Marked pins 1, 2 and 3 are connected to GPIOs of ESP32. Do I need to add any additional pull-up resistors or some termination resistors or ...
0
votes
1
answer
540
views
ESP32-S3: Serial stops working after a random period of time
I am using a ESP32-S3 Dev Kit (Arduino code) connected to a MAX3232 to read data from a solar inverter. I am facing a strange problem as follows:
The UART (Serial1, ...
- 101
0
votes
0
answers
408
views
ESP32 BLE Bluetooth Serial to Hardware Serial Bridge
I'm looking for a way to use serial devices with my iOS iPhone without buying a $20 device.
I have an ESP32 which can do Bluetooth Serial to Serial using this code but if I replace the Serial with <...
- 138
1
vote
1
answer
429
views
ESP32 program completely halts when serial terminal is disconnected
My platform is ESP32-wroom (Devkit v1 board). ESP-IDF 5.0 on Win10.
I've been using PuTTY to monitor the ESP32's serial log and output (the main serial where all the diagnostic info goes, not the ...
- 109
0
votes
0
answers
29
views
Passing Serial Object Created by a Library to another Library
I am trying to create a library for Topway brand LCD based on this docs. Inspired by this library header file, and source file I have created a Serial object in my library which is fix.h and fix.cpp. ...
- 1,139
1
vote
1
answer
356
views
How to choose pull-up resistor values for level shifting circuitry for serial communications
I recently joined a new project where two ESP32-WROOM-32UE modules on separate circuit boards talk to each other via the UART pins. The distance between the two boards is roughly 1 meter of cable ...
- 475
0
votes
0
answers
990
views
How to make an ESP32 S2 not lose USB connection after uploading?
I am using an ESP32 S2 Mini, and I'm running into this problem:
I put the unit into the "flash" state, by pressing the "0" and "RST" buttons. Doing this establishes the ...
- 145
0
votes
2
answers
197
views
Serial reading returns undefined characters
I am trying to communicate using LoRa modules with an ESP32. I can easly communicate with two LoRa modules, but if I want to learn the sender address, the Arduino returns an undefined character. I am ...
- 1,139
0
votes
1
answer
529
views
ESP32 and FTDI USB to UART wiring
I'm designing something like a stream deck. How would I wire a ESP32-WROOM-32D to the f230x? I have already connected the RX and TX but I don't know what to do with the RTS, CTS, and CBUS pins. Also ...
