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ESP32-WROOM-32 NodeMCU 38-Pin Development Board

Rating:
91%
ESP32 Boards
₹499.00 ₹ 422.88 + 76.12 GST
Out of stock
SKU
PRO765

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25+ ₹486.53 ₹ 412.31 + 74.22 GST
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100+ ₹469.06 ₹ 397.51 + 71.55 GST

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High-performance ESP32-WROOM-32 development board featuring a 38-pin layout for maximum GPIO access. Ideal for advanced IoT projects requiring dual-core processing and integrated wireless connectivity.

Most 30-pin variants force you to choose between essential peripherals, leading to messy workarounds or "pin-multiplexing" headaches that stall your prototype. The ESP32-WROOM-32 38-Pin NodeMCU solves this by breaking out the full power of the Xtensa® dual-core processor, giving you the extra GPIO density required for high-bandwidth sensors, displays, and actuators without compromise.

At Probots, we eliminate the "silicon lottery" often found in budget marketplaces by ensuring every board is Probots™ Lab Verified . Our engineering team in Bangalore rigorously tests each batch for signal integrity and thermal stability under load, so you don't have to worry about mysterious crashes during a long-term deployment. Because we utilize Probots™ Source-Trace  protocols, you are guaranteed genuine WROOM-32 modules sourced from Tier-1 factories, providing the consistent performance and Probots™ LifeCycle Ready  reliability needed for both professional R&D and institutional projects.

This versatile board is the backbone for high-demand applications like industrial monitoring, smart home gateways, and edge AI processing. With its integrated WiFi and Dual-Mode Bluetooth, it acts as a seamless bridge between local sensor networks and cloud platforms like AWS or Azure. Whether you are controlling a fleet of autonomous rovers or building a real-time environmental monitoring station, the 38-pin layout ensures that dedicated hardware pins for SPI, I2C, and UART are always accessible for a cleaner, more robust circuit design.

Moving to the ESP32 38-pin version represents a significant evolution in your development journey; if you have previously built basic projects with an Arduino or ESP8266, this board unlocks the world of multi-threaded execution. By leveraging the dual-core architecture, you can offload background tasks like WiFi management to one core while your critical sensor loops run uninterrupted on the other. It is an intermediate-level upgrade that scales with your skills, providing a professional-grade platform that transitions perfectly from a breadboard prototype to a custom PCB production environment.

Note:

  • The module previously referred to as "ESP32 WROOM-32" will now be primarily called ESP32.
  • This change is for naming consistency and does not affect the module's specifications, functionality, or physical characteristics.

Specifications:

  • Module: ESP32-WROOM-32 (Genuine Silicon)
  • Processor: Xtensa® Dual-Core 32-bit LX6 (Up to 240MHz)
  • Memory: 4MB Flash / 520KB SRAM
  • Connectivity: WiFi 802.11 b/g/n + Bluetooth v4.2 BR/EDR & BLE
  • Pin Count: 38-Pin Layout (Extended GPIO Access)
  • USB Interface: Micro USB (CP2102 or CH340 based stability)
  • Operating Voltage: 2.2V to 3.6V (On-board 3.3V LDO regulator)
  • Peripherals: 12-bit ADC, 2x 8-bit DAC, 10x Touch Sensors, 3x UART, 3x SPI, 2x I2C, PWM, and Hardware Encryption.

Key Applications

  • Industrial Monitoring: Real-time data logging with WiFi telemetry.
  • Smart Home Hubs: Managing multiple MQTT streams and local displays.
  • AI on the Edge: Simple voice recognition or pattern matching using dual-core processing.
  • Robotics: Controlling multiple servos and sensors simultaneously via high-density GPIOs.

Project Evolution

  • Past Projects: If you have mastered the basic Arduino Uno or ESP8266, you likely hit a wall with memory and processing speed.
  • The Upgrade: Moving to this 38-Pin ESP32 unlocks high-speed dual-threading. You can run your "Web Server" on one core and your "Sensor Logic" on the other for zero-latency performance.
  • Effort Level: Intermediate. Requires ESP32 Board Core installation in Arduino IDE or MicroPython/Espressif IDF.

Virtual Technician & Wiring

  • ⚠️ Voltage Warning: This is a 3.3V Logic device. Applying 5V directly to GPIO pins will result in permanent damage.
  • Powering: Use the Micro USB port or the 5V/VIN pin. The 3.3V pin is an output from the on-board regulator.
  • Pin Mapping: Features dedicated hardware pins for I2C (SDA/SCL) and SPI (MISO/MOSI). Refer to the silkscreen on the back for the 38-pin specific layout.

Package includes:

1 x ESP32-WROOM-32 NodeMCU 38-Pin Development Board

Frequently Asked Questions (Technical FAQs)

  1. What is the difference between the 30-pin and 38-pin ESP32? The 38-pin version breaks out more GPIOs and power pins, providing better access to the chip’s full peripheral set.
  2. Does this support MicroPython?
    Yes, it is fully compatible with MicroPython, CircuitPython, and Arduino IDE.
  3. How do I put the board into Flash Mode?
    Most boards auto-reset, but if needed, hold the 'BOOT' button, press 'EN', and release 'BOOT'.
  4. Can I power this via the 3.3V pin?
    No, the 3.3V pin is for output. Power the board via Micro USB or the 5V VIN pin.
  5. Is the antenna built-in?
    Yes, it features an integrated PCB trace antenna for WiFi and Bluetooth.
  6. What is the maximum current for GPIO pins?
    Approximately 12mA to 40mA per pin; do not drive motors directly from pins.
  7. Does it support 5GHz WiFi?
    No, ESP32 only supports 2.4GHz WiFi bands.
  8. Can I use Bluetooth and WiFi simultaneously?
    Yes, though they share the same internal radio/antenna.
  9. Which USB driver do I need?
    Usually requires the CP210x or CH340 drivers depending on the specific batch.
  10. What is the "Dual Core" benefit?
    You can assign specific tasks to Core 0 and Core 1 using FreeRTOS.
  11. Is it breadboard friendly?
    Yes, but because of the 38-pin width, it leaves only one row of pins accessible on standard breadboards.
  12. Can it run on a LiPo battery?
    Yes, via the VIN pin with a 5V boost converter or a 3.7V to 3.3V LDO.
  13. Is the board FCC certified?
    The module itself (WROOM-32) is FCC/CE certified.
  14. What is the range of the WiFi?
    Typically 30-50 meters indoors depending on obstructions.
  15. Does it have a built-in LED?
    Yes, most variants include a power LED and a user-programmable LED (GPIO2).
  16. How much RAM is available?
    520KB of internal SRAM.
  17. What is the deep sleep current?
    Approximately 10µA to 20µA, making it ideal for battery projects.
  18. Can I use this for BLE?
    Yes, it supports both Bluetooth Classic and Bluetooth Low Energy (BLE).
  19. What is the clock speed?
    Adjustable up to 240MHz.
  20. Does it support capacitive touch?
    Yes, it has 10 internal capacitive touch-sensing GPIOs.
More Information
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Probots sells every Electronics Part for your next Project. You can order 10,000+ Electronic Parts Online - Arduino, Raspberry Pi, NodeMCU Development Boards, Sensors, Motors, Motor Drivers, SMPS, Plastic Enclosures etc in India directly on probots.co.in

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Raja Ramakrishna

We are into electronics & mechanical projects in this connection we had contacted probots & we visited them , To our pleasant surprise , their presentation with us was friendly wrapped with professional support , which helped us to choose better , this interaction was patient & excellent .with all confidence i shall promote them to my known sources looking for components . Pls maintain this attitude towards customer this shall take your organization to heights

Jay Kumar

Great place to get all electronic components and accessories for electronic products.

Mohan Rao

Srinivasan Sriram

I had ordered something, will write review after the order process is complete.

Chand Basha Shaik

Ordered a couple of times, Bad Experience. They charge premium delivery fee but delivery will not happen on time(every time). And the resopnce after sales on the issues such as delivery is slow and not friendly. If you can take the delivery at your own risk, and liesure you can order.

Kakunje Software Pvt.Ltd.

I would like to share a suggestion based on my recent experience. I am also running a private limited company and understand how important customer relationships are. One key area that needs attention is training employees on how to deal with customers professionally and respectfully. No business starts with bulk orders—every relationship begins small and grows with trust. I had some plans to collaborate when I visited your facility, but unfortunately, due to the way I was treated, I decided not to proceed with any future business plans. I believe this is not a reflection of the owner, but rather an issue with employee conduct. Proper training and customer handling can significantly improve business growth and reputation. As I do not have a direct contact, I am sharing this feedback here. If you would like to discuss further, please feel free to contact me. Our recent bill was under the name Electro Instruments.

Vu3Hzr Vu3Hzr

Fast Delivery, Accurate information, Quick resolution, most important acceptance & accountability and willingness to help.

Nischith shetty

Friendly staff but Too costly, price is 2x as compared to SP road.

Lahari Lahari

Varshaa Senthil kumar

The products were at reasonable cost and the service and care provider by the whole team to deliver it safe was really awesome I initially didn't receive the delivery but it was my fault it was with security Though they did their job right .they cared to make sure I got my order The team which delivered the products to me was really kind and did their job well

Vishak Raj

Rhea J M

SK

Quick and effective customer support

Suhas Krishna

I have been procuring components for some of my projects through Probots for more than a year now. Their service is prompt and commendable.

Rajkumar M

Good Responsive and Quick Replies for updates

Girish Swamy

Prompt, genuine and quick. Wide range of electronic components especially for builders and prototyping

Sudhanthiran Sugan

Hanish KVC

Online shop (they also have offline shop in Bengaluru) for buying electronic dev kits and accessories. I was able to connect through WhatsApp, for a shipment related issue that cropped up. They also followed up to confirm receipt of the parcel.

Narendra Bv

somaskanda .s

Very responsive! Quickly resolves any issues!

Tejas Sreenivas

I ordered online for store pickup and they packed it fast and sent items via rapido, fast packing and delivery. Thank you

Gangatharan J

Prompt delivery and friendly support.

sudam tandi

Nambi E

Cuustomer-friendly electronics component shop. The staff is very responsive, helpful, and knowledgeable. They guide properly and make the buying process easy. Overall, a great place for electronics components.

Sabari M

Thanks for your support in timely delivery

gowrisankar s

Aninda Mukhopadhyay

Pradeep Hegde

Quick response... Good quality

Manshi EA CE

Good services and coordination.

sneha parthi

Raja Ramakrishna

We are into electronics & mechanical projects in this connection we had contacted probots & we visited them , To our pleasant surprise , their presentation with us was friendly wrapped with professional support , which helped us to choose better , this interaction was patient & excellent .with all confidence i shall promote them to my known sources looking for components . Pls maintain this attitude towards customer this shall take your organization to heights

Jay Kumar

Great place to get all electronic components and accessories for electronic products.

Mohan Rao

Srinivasan Sriram

I had ordered something, will write review after the order process is complete.

Chand Basha Shaik

Ordered a couple of times, Bad Experience. They charge premium delivery fee but delivery will not happen on time(every time). And the resopnce after sales on the issues such as delivery is slow and not friendly. If you can take the delivery at your own risk, and liesure you can order.

Kakunje Software Pvt.Ltd.

I would like to share a suggestion based on my recent experience. I am also running a private limited company and understand how important customer relationships are. One key area that needs attention is training employees on how to deal with customers professionally and respectfully. No business starts with bulk orders—every relationship begins small and grows with trust. I had some plans to collaborate when I visited your facility, but unfortunately, due to the way I was treated, I decided not to proceed with any future business plans. I believe this is not a reflection of the owner, but rather an issue with employee conduct. Proper training and customer handling can significantly improve business growth and reputation. As I do not have a direct contact, I am sharing this feedback here. If you would like to discuss further, please feel free to contact me. Our recent bill was under the name Electro Instruments.

Vu3Hzr Vu3Hzr

Fast Delivery, Accurate information, Quick resolution, most important acceptance & accountability and willingness to help.

Nischith shetty

Friendly staff but Too costly, price is 2x as compared to SP road.

Lahari Lahari

Varshaa Senthil kumar

The products were at reasonable cost and the service and care provider by the whole team to deliver it safe was really awesome I initially didn't receive the delivery but it was my fault it was with security Though they did their job right .they cared to make sure I got my order The team which delivered the products to me was really kind and did their job well

Vishak Raj

Rhea J M

SK

Quick and effective customer support

Suhas Krishna

I have been procuring components for some of my projects through Probots for more than a year now. Their service is prompt and commendable.

Rajkumar M

Good Responsive and Quick Replies for updates

Girish Swamy

Prompt, genuine and quick. Wide range of electronic components especially for builders and prototyping

Sudhanthiran Sugan

Hanish KVC

Online shop (they also have offline shop in Bengaluru) for buying electronic dev kits and accessories. I was able to connect through WhatsApp, for a shipment related issue that cropped up. They also followed up to confirm receipt of the parcel.

Narendra Bv

somaskanda .s

Very responsive! Quickly resolves any issues!

Tejas Sreenivas

I ordered online for store pickup and they packed it fast and sent items via rapido, fast packing and delivery. Thank you

Gangatharan J

Prompt delivery and friendly support.

sudam tandi

Nambi E

Cuustomer-friendly electronics component shop. The staff is very responsive, helpful, and knowledgeable. They guide properly and make the buying process easy. Overall, a great place for electronics components.

Sabari M

Thanks for your support in timely delivery

gowrisankar s

Aninda Mukhopadhyay

Pradeep Hegde

Quick response... Good quality

Manshi EA CE

Good services and coordination.

sneha parthi

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