● 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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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 ESP32-WROOM-32D 30-Pin Development Board is the modern answer to classic IoT prototyping. By replacing the outdated Micro-USB with a robust USB Type-C interface, this board ensures better power delivery and a reversible connection that won't wear out. Combined with the rock-solid CH340C serial bridge, you get plug-and-play reliability on every OS.
Standard clones often sacrifice signal integrity for cost. This board is Probots™ Lab Verified to ensure the onboard PCB antenna provides maximum gain and stable Wi-Fi throughput. We know how sensitive these modules are, which is why they are Probots™ Logic-Safe, featuring high-quality LDO regulators to keep your 3.3V rail clean even under heavy Wi-Fi transmission bursts.
Core: ESP32-WROOM-32D (Dual-core 32-bit LX6)
Connectivity: Wi-Fi (802.11 b/g/n) + Dual-mode Bluetooth (Classic + BLE)
USB Port: Type-C (Reversible & Enhanced Durability)
Serial Bridge: CH340C (High-compatibility driver support)
Pin Configuration: 30-Pin Narrow (Maximum breadboard space)
SRAM: 520 KB
Flash: 4 MB
Clock Speed: Adjustable up to 240 MHz
Input Voltage: 5V via USB
IoT Sensors: Stream data to Adafruit IO or Blynk.
Home Automation: Build a Wi-Fi-Enabled Relay Controller.
Bluetooth Gateway: Bridge BLE sensors to a Wi-Fi network.
Web Servers: Host a local control dashboard directly on the chip.
Past Projects: If you’ve worked with the ESP8266 or Arduino Nano, this is your next step into high-performance computing.
Feature Upgrade: The "D" variant of the WROOM-32 offers enhanced RF performance, resulting in fewer dropped packets and improved range compared to the original modules.
Effort Level: Intermediate. Supported by Arduino, MicroPython, and ESP-IDF.
⚠️ Logic Warning: The ESP32 is NOT 5V TOLERANT on its GPIO pins. Always use level shifters if interfacing with 5V sensors.
Vin: External DC input (5V-9V).
3V3: 3.3V Output for sensors.
EN: Reset button connection.
BOOT: Enter flash mode button.
Included: 1x ESP32-WROOM-32D 30-Pin Development Board WiFi + Bluetooth IoT Module with CH340C 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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