
Espressif Systems
Active ESP32-WROOM-32E-N4 is the strongest catalog upgrade path for the NRND target.
ESP32-WROOM-32-N4 is not recommended for new designs. The strongest catalog path is the active ESP32-WROOM-32E-N4, pending pinout review.
Voltage matches on leading ESP32 options.
Package matches, but pin functions are unverified.
Flash, PSRAM, and boot straps may differ.
E-N4 and several variants are active.
No pin-compatible replacement is verified from the provided fields.
Use ESP32-WROOM-32E-N4 first, then review E-H4 or larger-flash variants.
Pinout and firmware assumptions are not proven here.

Espressif Systems
Active ESP32-WROOM-32E-N4 is the strongest catalog upgrade path for the NRND target.
| Feature / factor | ESP32-WROOM-32-N4 | ESP32-WROOM-32E-N4 | ESP32-WROOM-32E-H4 | ESP32-WROOM-32D-N8 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 38-SMD Module | 38-SMD Module | 38-SMD Module | 38-SMD Module | 38-SMD Module — same catalog package; ESP32-WROOM-32E-H4: same catalog package; ESP32-WROOM-32D-N8: same catalog package; ESP32-WROOM-32D-N16: same catalog package |
| Pinout | 38 pins | 38 pins | 38 pins | 38 pins | 38 pins — pin functions not shown; ESP32-WROOM-32E-H4: pin functions not shown; ESP32-WROOM-32D-N8: pin functions not shown; ESP32-WROOM-32D-N16: pin functions not shown |
| Voltage | 3.0-3.6 V | 3.0-3.6 V | 3.0-3.6 V | 3.0-3.6 V | 3.0-3.6 V — same range; ESP32-WROOM-32E-H4: same range; ESP32-WROOM-32D-N8: same range; ESP32-WROOM-32D-N16: same range |
| Temperature | -40 to 85 C | -40 to 85 C | -40 to 105 C | -40 to 85 C | -40 to 85 C / -40 to 105 C — same range; ESP32-WROOM-32E-H4: wider high temp; ESP32-WROOM-32D-N8: same range |
| Lifecycle | NRND | Active | - | - | Active — better sourcing |
| Application | 4MB flash | - | 4MB flash | 8MB flash | 4MB flash / 8MB flash / 16MB flash — same flash size; ESP32-WROOM-32D-N8: firmware check; ESP32-WROOM-32D-N16: firmware check |
| Interface | UART/SPI/SDIO/I2C/PWM/ADC/DAC | - | - | - | listed similar — artifact lists interfaces |
ESP32-WROOM-32E-N4 is the best supported candidate from the provided evidence, but it still needs pinout review.