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Break through walls with your IoT signals! This ESP32 NodeMCU board features the ESP-WROOM-32U module with a U.FL connector, allowing you to attach high-gain external antennas for massive Wi-Fi and Bluetooth range.
GL-12 840 Points Solderless Breadboard for Electronics Prototyping & DIY Projects ₹86.00 
Jumper Wire - Female to Female 40 Pcs 20 CM ₹69.00 
Breadboard for Electronics Solderless Prototyping 400 Points ₹49.00 
Male to Male Jumper wires 40 Pcs 20 CM ₹69.00 
Male To Female Jumper Wires 40 Pcs 20cm ₹69.00 The Long-Range IoT Solution Standard ESP32 boards use a zig-zag trace antenna printed directly onto the circuit board. While great for desktop prototyping, trace antennas struggle severely if you put your project inside a metal box, mount it behind a thick concrete wall, or place it out in the garden. The ESP-WROOM-32U module solves this physics problem. By providing a standard U.FL (IPEX) micro RF connector, you can easily snap on a high-gain "rubber ducky" antenna or run a pigtail cable to the outside of your project enclosure, guaranteeing a rock-solid Wi-Fi connection even at extreme distances.
Uncompromised Dual-Core Power Changing the antenna doesn't mean changing your code. This board features the exact same Espressif ESP32-D0WDQ6 dual-core 32-bit microprocessor running at up to 240MHz. It natively supports full 802.11 b/g/n Wi-Fi, classic Bluetooth (BR/EDR), and Bluetooth Low Energy (BLE). All your existing ESP32 Arduino sketches, MicroPython scripts, and ESP-IDF projects will compile and run flawlessly without any modifications.
Breadboard-Ready NodeMCU Design Built on the proven NodeMCU form factor, this development board includes an onboard USB-to-Serial converter (typically CP2102 or CH340) and a 3.3V voltage regulator. This means you can power and program the chip directly from your computer via a standard Micro-USB cable without needing any external programmers. The pinout is fully breadboard compatible, giving you easy access to the ESP32's massive array of ADCs, DACs, PWM outputs, and capacitive touch sensors.
Specifications
Microcontroller: Espressif ESP32-D0WDQ6 (Dual-core 32-bit Xtensa LX6)
Clock Speed: Up to 240 MHz
Flash Memory: 4 MB (SPI)
Wireless: 2.4 GHz Wi-Fi (802.11 b/g/n) & Bluetooth v4.2 (BR/EDR & BLE)
Antenna Interface: U.FL / IPEX Generation 1 Connector
USB Interface: Micro-USB (for power and programming)
Operating Voltage: 3.3V logic (Powered via 5V from USB or VIN pin)
Pins: 38
Downloads:
Unlock New Capabilities (Project Evolution) The Deep-Range Soil Monitor: Are you trying to monitor the soil moisture of a garden bed that is 150 feet away from your house router? A standard ESP32 will drop off the network constantly. Evolve your hardware! Place this ESP-WROOM-32U board inside a waterproof junction box. Drill a small hole, install an SMA pigtail cable, and screw on a 5dBi external 2.4GHz antenna pointing toward your house. You can now reliably transmit analog soil data back to your Home Assistant server from the very edges of your property line!
1 x ESP-WROOM-32U ESP32 NodeMCU Development Board
Note: An external antenna is strictly required for operation and is usually sold separately.
1. What is the main difference between the WROOM-32 and WROOM-32U? The only difference is the antenna. The standard WROOM-32 has a built-in PCB trace antenna. The WROOM-32U lacks the onboard antenna and instead features a tiny gold U.FL connector so you can attach your own external antenna.
2. Can I test my code on this board without an antenna attached? No. It is highly recommended NOT to do this. Transmitting radio frequency (Wi-Fi or Bluetooth) without an antenna attached acts as an "open load." The RF energy reflects back into the module and can permanently damage the ESP32's internal radio amplifier. Always attach an antenna before powering the board.
3. What kind of antenna do I need to buy? You need a 2.4GHz antenna (the same frequency used for standard Wi-Fi and Bluetooth) with a U.FL (or IPEX Generation 1) connector. Alternatively, you can use a U.FL-to-SMA adapter cable and attach a standard router antenna.
4. Will this increase my processing speed or RAM? No. The processing capabilities, 4MB Flash memory, and 520 KB SRAM are completely identical to a standard ESP-WROOM-32 module.
5. How do I program this board? You connect it to your PC using a Micro-USB cable. You can use the Arduino IDE, PlatformIO, or Thonny (for MicroPython). In the Arduino IDE, you can usually just select "DOIT ESP32 DEVKIT V1" or "NodeMCU-32S" as your board.
6. Do I need to install drivers? Yes, usually. Depending on the exact board manufacturer, the USB-to-Serial chip near the Micro-USB port will either be a Silicon Labs CP210x or a WCH CH340. You may need to download the respective driver for your operating system to see the COM port.
7. Can I power this with a battery? Yes. You can supply a regulated 5V to the "VIN" (or 5V) pin, or supply exactly 3.3V to the "3.3V" pin. There is no built-in LiPo battery charging circuit on this specific board, so you cannot plug a battery directly into it without a management module.
8. Are the pins 5V tolerant? No. All GPIO pins on the ESP32 are strictly 3.3V logic. If you are reading data from a 5V sensor, you must use a logic level converter or a voltage divider, otherwise you will fry the pin.
9. Why is my board failing to upload code? If the Arduino IDE says "Connecting..." and then times out, hold down the "BOOT" button on the board while the IDE is trying to connect. Once it starts writing, you can release the button.
10. Does the external antenna improve Bluetooth range too? Yes! Wi-Fi and Bluetooth share the exact same 2.4GHz radio frequency and the same antenna output path. An upgraded antenna will massively increase both your Wi-Fi and BLE range.
11. Does this board have PSRAM? No, the standard ESP-WROOM-32U module does not include external PSRAM. It utilizes the standard 520 KB of internal SRAM.
12. Can I use the onboard trace antenna if I don't have an external one? No, the WROOM-32U module physically lacks a printed trace antenna. It relies entirely on the U.FL connector for all RF transmission and reception.
13. What is the maximum range I can get with this board? Range depends entirely on the antenna you attach. With a high-gain directional antenna and clear line of sight, users have achieved several kilometers. A standard omnidirectional antenna usually provides a few hundred meters.
14. Can I remove the metal shield on the module? It is highly discouraged. The metal shield is an EMI (Electromagnetic Interference) cage that prevents the radio from interfering with the processor, and it also acts as a vital heat sink for the ESP32 chip.
15. Is this board compatible with MicroPython? Yes. Because the architecture is identical to the standard ESP32, you can easily flash the official ESP32 MicroPython binary onto this board using the esptool.py command-line utility.
16. How much Flash memory does it have? The ESP-WROOM-32U module comes standard with 4 Megabytes (4MB) of embedded SPI Flash memory, providing plenty of room for OTA updates and LittleFS file storage.
17. What are the two small buttons on the board for? One button is labeled "EN" (Enable/Reset) and is used to manually reboot the microcontroller. The other is labeled "BOOT" (tied to GPIO 0) and is used to manually force the chip into firmware download mode.
18. What is the maximum current draw? During heavy Wi-Fi transmission, the ESP32 can experience short current spikes up to 250mA - 300mA. Ensure your USB port or external power supply is rated for at least 500mA to prevent brownout resets.
19. Does it support 5GHz Wi-Fi networks? No. Like almost all microcontrollers in this class, the ESP32 only operates on the 2.4GHz Wi-Fi band to maintain lower power consumption and longer signal propagation.
20. Can I connect an external SMA antenna? Yes, but you will need an adapter. The board has a tiny U.FL female connector. You must purchase a "U.FL to SMA Female" pigtail cable, which will then allow you to screw on standard router-style SMA antennas.
| Core Chipset: | ESP32 |
|---|---|
| Flash Memory: | 4 MB |
| PSRAM: | NA |
| Wireless Connectivity: | WiFi, Bluetooth |
| Antenna Type: | Onboard PCB |
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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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It was good experience
Staff is very patient and helpful
One of the best place for electronics you will get everything you want! With the best and orginal quality
Very helpful staff and the best place to buy components for projects
Wonderful store with expert service and technically strong people.
Prompt delivery, excellent technical support
Large inventory of electronic components and parts. Well trained service personnel and technicians who can quickly identify and rectify product defect if any. They are a reliable and trustworthy online stores.
Excellent and prompt service
Excellent and prompt response, great and Quality product... All the best... Thank you
I got the thing that was taking the whole Bangalore to search for here
Excellent attitude and prompt service by Bharath. Saved me a trip to SP Road while having ample time to explore new products. Ended up buying much more than what i had originally envisaged. Hope to engage more often and upgrade my skills. God bless
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
Great place to get all electronic components and accessories for electronic products.
Fast Delivery, Accurate information, Quick resolution, most important acceptance & accountability and willingness to help.
Friendly staff but Too costly, price is 2x as compared to SP road.
It was good experience
Staff is very patient and helpful
One of the best place for electronics you will get everything you want! With the best and orginal quality
Very helpful staff and the best place to buy components for projects
Wonderful store with expert service and technically strong people.
Prompt delivery, excellent technical support
Large inventory of electronic components and parts. Well trained service personnel and technicians who can quickly identify and rectify product defect if any. They are a reliable and trustworthy online stores.
Excellent and prompt service
Excellent and prompt response, great and Quality product... All the best... Thank you
I got the thing that was taking the whole Bangalore to search for here
Excellent attitude and prompt service by Bharath. Saved me a trip to SP Road while having ample time to explore new products. Ended up buying much more than what i had originally envisaged. Hope to engage more often and upgrade my skills. God bless
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
Great place to get all electronic components and accessories for electronic products.
Fast Delivery, Accurate information, Quick resolution, most important acceptance & accountability and willingness to help.
Friendly staff but Too costly, price is 2x as compared to SP road.
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