● 17 min readShowdown: Uno R4 vs Uno R3 vs Nano
Welcome to Vol. 12 of The Probots Showdown. Three boards. Three price points. Three very different futures for your project.Should you stick with the
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| QTY | Unit Price(Inlc. GST) | |
| 5+ | ₹489.02 ₹ 414.42 + 74.6 GST | |
| 10+ | ₹484.03 ₹ 410.19 + 73.83 GST | |
| 15+ | ₹474.05 ₹ 401.74 + 72.31 GST | |
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Compact 30-pin ESP32-WROOM-32D development board featuring a high-durability Type-C interface and stable CH340C serial communication for breadboard-friendly IoT projects.
The ESP-WROOM-32 (ESP-32S) 30-Pin Development Board is the professional’s choice for IoT prototyping. We’ve ditched the generic CH340 chips and legacy connectors. This board features the high-performance Silicon Labs CP2102 USB-to-UART bridge for rock-solid 3Mbps data rates and a modern USB Type-C interface that’s built to survive hundreds of plug-cycles.
Most "low-cost" ESP32 boards suffer from poor antenna tuning and unstable power rails. Our units are Probots™ Lab Verified to ensure the 2.4GHz Wi-Fi and Bluetooth signal integrity meets strict datasheet standards. To protect your investment, this board is Probots™ Logic-Safe, utilising high-tolerance voltage regulators that prevent transient spikes from damaging the dual-core LX6 processor during high-current Wi-Fi bursts.
Module: ESP-WROOM-32 (ESP-32S)
Processor: Dual-core Xtensa® 32-bit LX6 (up to 240MHz)
USB Bridge: Silicon Labs CP2102 (Premium stability, no driver headaches)
Connector: USB Type-C (Reversible and durable)
Memory: 448 KB ROM, 520 KB SRAM, 4MB External Flash
Connectivity: Wi-Fi 802.11 b/g/n + Bluetooth v4.2 BR/EDR & BLE
Form Factor: 30-Pin (Breadboard-friendly narrow design)
Operating Voltage: 3.3V (Logic), 5V (USB/Vin Input)
Peripherals: 12-bit ADC, 8-bit DAC, SPI, I2C, I2S, UART, PWM, Capacitive Touch
Smart Home Hubs: Create a secure gateway for Zigbee or BLE sensors.
Industrial Data Loggers: Reliable high-speed serial logging via CP2102.
Audio Over IP: Stream MP3 or AAC audio thanks to dual-core processing.
BLE Mesh Networks: Deploy low-power sensor nodes in large environments.
Past Projects (Prerequisites): If you have worked with the basic ESP8266 or Arduino boards, you already know the basics of GPIO control.
Feature Upgrade: This board unlocks True Parallel Processing. With two cores, you can dedicate one to heavy Wi-Fi/Cloud communication (like AWS or Firebase) while the second core handles real-time sensor interrupts without a single microsecond of lag.
Effort Level: Intermediate. Works seamlessly with Arduino IDE, MicroPython, and ESP-IDF.
⚠️ Critical Warning: The CP2102 bridge handles data, but the board's logic is strictly 3.3V. Connecting 5V sensors directly to GPIO pins will result in permanent chip failure.
Vin: Connect 5V external power here if not using USB.
3V3: Regulated output (Max ~500mA for peripherals).
GPIO21 (SDA) / GPIO22 (SCL): Standard I2C pins.
EN Button: Manual hardware reset.
Included: 1x ESP-WROOM-32 ESP-32S Development Board 30-Pin WiFi + Bluetooth with CP2102 & Type-C
Required Additional: USB Type-C Data Cable, Breadboard for prototyping.
| Core Chipset: | ESP32 |
|---|---|
| Flash Memory: | 4 MB |
| PSRAM: | NA |
| Wireless Connectivity: | WiFi, Bluetooth |
| Antenna Type: | Onboard PCB |
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
We delivery electronics components and parts throughout India using standard couriers like Bluedart, Delhivery & India Post.
For order related queries contact -
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
We offer specialized services for Bulk, Wholesale & B2B Customers like discounted prices, additional shipping options, customised products, etc . Customer with large quantity & regular orders qualify for the specialised discounted rates.
We also offer dedicated sales team to assist you with the order process by providing sales quotations, PI, technical support for choosing products, etc.
Note: Business Orders are processed manually and usually take 1-3 days to process compared to placing the order directly on our website. Please plan your purchases accordingly.
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Probots Electronics is highly regarded for its great selection of components and professional service. Customers frequently praise the awesome care and timely delivery provided by the team to ensure all products arrive safely.
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