● 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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The ultimate student-friendly ESP32. The Acebott Max V3.0 features an Arduino Uno form factor, colour-coded GVS headers for mess-free wiring, and built-in Li-Ion battery charging. Includes high-quality 1M Type-C Cable.
The ACEBOTT QA019 ESP32 Max V3.0 Controller Board is a smart and energy-efficient microcontroller perfect for building IoT projects. It has a fast 240 MHz dual-core processor, 520 KB of RAM, and 4MB of storage. Built-in WiFi and Bluetooth 4.2 make it easy to connect to other devices wirelessly.
V3.0 Upgrades: Power & Convenience. The new V3.0 version is a massive upgrade. It ditches the old Micro-USB for a modern USB Type-C port (high-quality 1M cable included!). It also adds a dedicated PH2.0 Battery Port with a charging circuit simply plug in a 3.7V Li-Ion battery, and the board will charge it while running on USB, then switch to battery power seamlessly when unplugged. A 5-LED Power Indicator keeps you informed of the battery level, so your robot never dies unexpectedly.
Specifications
Core Chip: ESP32-WROOM-32 (Dual Core 240MHz, WiFi + Bluetooth).
Form Factor: Arduino Uno R3 Compatible (Mounting holes & Shield spacing).
USB Interface: Type-C (CH340 Driver).
I/O Interface:
GVS Headers: Ground (Black), Voltage (Red), Signal (Blue/Yellow) for every pin.
I2C/UART/SPI: Dedicated 4-pin headers for easy expansion.
Power Management:
Input: 5V (USB/DC Jack) or 3.7V Li-Ion.
Battery Support: PH2.0 Connector with Onboard Charging.
Indicator: 4-Level Battery LED + Power LED.
Included Accessory: 1 Meter USB Type-C Data Cable.
Applications
Classroom Robotics: The GVS headers prevent short circuits and "spaghetti wiring," making it perfect for teaching kids.
Portable IoT: Build a WiFi weather station or GPS tracker that runs on battery and recharges via USB, without needing extra modules.
Smart Home: Controls servos and relays easily thanks to the dedicated voltage and ground pins next to every signal pin.
Project Evolution
The Bottleneck: With a standard ESP32, powering 4 servos requires a messy breadboard to split the 5V/GND lines.
The Upgrade: The ESP32 Max V3.0 has a VCC and GND pin next to every digital pin. You can plug 4 servos directly into the board in seconds.
Effort Level: Beginner. It’s the easiest way to start with ESP32.
Virtual Technician & Setup Guide
Driver: Uses the standard CH340 driver. Ensure you install it if your computer doesn't recognise the COM port.
Board Selection: In Arduino IDE, select "ESP32 Dev Module".
Battery Polarity: The PH2.0 port is designed for standard 3.7V Li-Ion batteries. Double-check polarity (Red = +) before plugging in non-Acebott batteries.
Shield Compatibility: While it fits Uno shields physically, remember the logic level is 3.3V. Some old 5V-only Arduino shields might not work or could damage the chip.
Accessories & Compatibility
Included: 1x ESP32 Max V3.0 Board, 1x USB Type-C Cable (1M).
Compatible: standard 3-pin Sensors (GVS), 3.7V Li-Ion Battery (PH2.0), Arduino Shields (3.3V compatible).
Frequently Asked Questions (Technical SEO)




| 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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