what software are you running on the PC?
how do you tell it which COM port to use?

when connecting microcontrollers to PCs where the Windows COM port or Linux /dev/ttyUSB* port is unknown I usually have the host software (implemented in C++, C#, Java, etc) cycle thru the connected serial ports transmitting a prompt (e.g. a "?") to each device in turn the target device would be pro...

Thanks for confirming that the ESP32 does not support sync manager.

thought it worth checking in case it was something in my code

following on from post "ESP32S3 RMT "no free tx channels" opening third channel" https://esp32.com/viewtopic.php?f=13&t=42301 where a solution was found attempting to run code on an ESP32 with esp-idf-v5.3.1 #include <stdio.h> #include <stdbool.h> #include <unistd.h> // ESP32 RMT 1KHz three phase sq...

thanks, that fixed it! updated code as suggested and in addition fixed timing of pulsePattern3 #include <stdio.h> #include <stdbool.h> #include <unistd.h> // ESP32S3 RMT 1KHz three phase square wave sync test #include "driver/rmt_tx.h" void app_main(void) { // while (true) { // printf("Hello from ap...

if you are using the Adafruit_NeoPixel library it has problems with ESP32 Arduino Core Version 3 when there are more than 85 LEDs - I use ESP32 core V 2.0.17 for such projects

version is esp-idf-v5.3.1 originally had this problem using the Arduino IDE - see https://forum.arduino.cc/t/esp32s3-rmt-no-free-tx-channels-opening-third-channel/1310503 thought it may just be an Arduino ESP32 problem so tried the ESP-IDF to check - same problem using two RMT Tx channels works OK

using ESP32-S3-DevKitC-1 using ESP-IDE on Windows 10 attempting to generate 1KHz three phase pulses using RMT ESP32S3 technical reference manual section 37.2 states • Four TX channels • Four RX channels running the following code which attempts to open three Tx channels #include <stdio.h> #include <...