ESP32 DevKit (38-pin)
by Espressif / clone
SKU: PSA-CMP-ESP32
No reviews yetTypical India street price
₹220–₹450
Dual-core Wi-Fi + Bluetooth board for richer IoT and ML-on-edge demos.
Interface: Wi-Fi, BLE, GPIO, ADC, I2C, SPI, DAC
ESP32 can run similar Wi-Fi lab patterns; pin numbers differ from NodeMCU silk.
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Concept
ESP32 DevKit is a dual-core Wi-Fi + Bluetooth board for richer IoT, BLE phone control, and edge demos. Think of it as ESP8266’s more capable cousin.
A little theory
Xtensa dual-core (typically up to 240 MHz), Wi-Fi 802.11 b/g/n, Bluetooth Classic/BLE, multiple ADC channels, DAC on some pins, and touch sensors. Logic is 3.3 V CMOS. Strapping pins (GPIO0, 2, 12, 15) affect boot and flash voltage — avoid tying them oddly at reset. ADC is non-linear near the rails; prefer mid-range voltages. USB-UART chips on clones limit current — never power banks of servos from the DevKit 5 V pin.
How it works in a project
Install Arduino-ESP32 or use ESP-IDF. Select the correct board (WROOM-32 DevKit). Use WiFi.h / BLE libraries. Prefer external 5 V for actuators; level-shift any 5 V sensor outputs.
Classroom & project use
- BLE robots
- Wi-Fi sensor nodes
- ESP32-CAM sibling projects
- Audio / DAC experiments
Buying in India
Precautions
- 3.3 V I/O only
- Do not power servos from the UART chip
- Confirm 30-pin vs 38-pin silkscreen
Specifications
| MCU | Xtensa dual-core |
| Wireless | Wi-Fi + BLE |
| Logic | 3.3V |
| Flash | Typically 4 MB |
| Form | DevKit / WROOM-32 |
| Category | Microcontrollers |
| Difficulty | Intermediate |
| Voltage | 3.3V logic |
| Interface | Wi-Fi, BLE, GPIO, ADC, I2C, SPI, DAC |
Pinout
3V3 | GND | VIN Common: GPIO21 SDA, GPIO22 SCL (Wire default) UART0: GPIO1 TX / GPIO3 RX (USB) Avoid strapping: GPIO0, 2, 12, 15 for casual outputs ADC1 safer with Wi-Fi than ADC2
