ESP32-S3 crushing when using ONEWIRE protocol and Hardware Serial

[gideonmaina]

I am experiencing something strange when using a DHT sensor and Hardware Serials with the ESP32-S3-WROOM-1 chip.

Everything works fine when using hardware serial peripherals only, or when working with the DHT sensor only, but not simultaneously.

To Reproduce

PlatformIO

platform = espressif32 ; confirmed this to be v6.10
board_build.f_cpu = 240000000L
board_upload.maximum_ram_size = 8388608

Hardware configuration

1. The DHT is connected to GPIO 36 via an instance of the Adafruit DHT library class. DHT dht(DHTPIN, DHTTYPE);
2. A Particulate Matter sensor connected to GPIO pins 21 and 45 for RX and TX, respectively, on UART 1.
3. A GSM module connected to GIPO pins 17 and 18 for RX and TX, respectively, on UART 2.

Observations

• Calling either of the Hardware Serial begin functions causes the program to crash after dht.begin() and restarts!
• Calling dht.begin() after either one of the hardware serials is started does not cause an issue, but immediately crashes after calling the second hardware serial begin function.
• This also happened when I was incorporating an SD card that caused similar issues.
• Unit tests run perfectly.

Just wondering if anyone has ever experienced this peculiar issue.

[gideonmaina]

I figured the issue arises from the memory type configuration on PlatformIO board config for ESP32-S3N16R8. qio_opi works well without introducing the DHT which changes the pin mode for GPIO 36 to INPUT_PULLUP or OUTPUT and setting the state to HIGH.

A board configuration that has "memory_type": "dio_qspi" and "flash_mode": "dio" resolved the issue.

I will test other configurations that work and list them here to close the discussion.