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ESP32-SOLO-1 IoT Development Board Module for Arduino
The ESP32-SOLO-1 is a single-core variant of the popular ESP32 microcontroller featuring a 160MHz Xtensa processor, integrated WiFi and Bluetooth connectivity, and 4MB of flash memory for IoT and embedded applications. Professional developers, hobbyists, and industrial automation engineers use this module to rapidly prototype connected devices, sensor networks, and smart home applications that require low-power wireless communication. This board solves the critical challenge of integrating WiFi connectivity with Arduino-compatible programming while maintaining a compact form factor and cost-effective solution for IoT deployments.
Product Overview
The ESP32-SOLO-1 operates on a dual-stack architecture combining a 32-bit Xtensa processor running at 160MHz with dedicated hardware for WiFi 802.11 b/g/n and Bluetooth 4.2 protocols. The module integrates a complete RF front-end, power management circuit, and clock oscillator on a single chip, eliminating the need for external components. This design approach provides developers with a production-ready platform that handles complex wireless protocols at the hardware level while exposing a simple GPIO and SPI/I2C interface for sensor integration and peripheral control.
What distinguishes the SOLO-1 variant is its single-core configuration optimized for cost-sensitive applications where dual-core processing is unnecessary. The module features 520KB of SRAM for runtime operations, 4MB of SPI flash for program storage and OTA updates, and 1KB of eFuse for secure boot and encryption keys. Built-in ADC converters with up to 12-bit resolution enable analog sensor measurements, while PWM outputs support motor control and LED dimming. The Arduino IDE compatibility ensures seamless integration into existing development workflows without requiring proprietary tools or steep learning curves.
Key Specifications
| Specification | Details |
| Product Type | Single-Core WiFi and Bluetooth IoT Microcontroller Module |
| Brand | Espressif Systems |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| Processor | 32-bit Xtensa Single-Core @ 160MHz |
| RAM | 520KB SRAM |
| Flash Memory | 4MB SPI Flash |
| Wireless Connectivity | WiFi 802.11 b/g/n and Bluetooth 4.2 LE |
| GPIO Pins | 34 total (28 usable as digital I/O) |
| ADC Channels | 12-bit SAR ADC with 8 channels |
| Operating Voltage | 3.3V |
| Power Consumption | 80mA active, 10uA deep sleep |
Key Features
- Dual Protocol Wireless: Integrated WiFi and Bluetooth 4.2 LE for simultaneous connectivity to cloud platforms and mobile applications without external modules
- Arduino Compatible: Fully supported by Arduino IDE with ESP32 board package, enabling C++ programming with familiar libraries and rapid prototyping
- Low Power Modes: Deep sleep at 10 microamps and light sleep at 0.8mA for battery-powered IoT devices requiring months of operation on single charge
- Rich Peripheral Set: 12-bit ADC, SPI, I2C, UART, and PWM outputs enabling direct integration of sensors, displays, and actuators without additional interface circuits
- Secure Boot and Encryption: Built-in AES-128 encryption, SHA-256 hashing, and RSA signature verification for secure firmware updates and data protection
- OTA Updates: Over-the-air firmware update capability via WiFi, allowing remote maintenance and feature deployment without physical access to devices
Applications and Use Cases
- Smart Home Automation: WiFi-enabled smart switches, thermostats, and lighting controllers that communicate with cloud platforms and mobile apps for remote monitoring and scheduling
- Industrial IoT Sensors: Temperature, humidity, and pressure monitoring nodes in manufacturing facilities that transmit data to MQTT brokers for real-time analytics and predictive maintenance
- Wearable Devices: Bluetooth-connected fitness trackers and health monitoring devices that sync data to smartphones while maintaining ultra-low power consumption through sleep modes
- Environmental Monitoring: Weather stations and air quality sensors that log data locally and transmit periodic updates via WiFi to cloud databases for long-term trend analysis
- Robotics and Drones: Motor control boards with WiFi telemetry for autonomous vehicles requiring real-time communication and sensor fusion with onboard processing
How to Use
Begin by installing the ESP32 board package in Arduino IDE through the Boards Manager using the URL https://dl.espressif.com/dl/package_esp32_index.json. Connect the ESP32-SOLO-1 to your computer via USB-to-UART adapter (CH340G or CP2102), select the correct board and COM port, and verify the connection by uploading the blink sketch. The module operates at 3.3V logic levels, so ensure all external sensors and devices are compatible or use level shifters for 5V peripherals to prevent damage.
For WiFi applications, use the built-in WiFi library to scan networks and connect to your SSID with credentials. For Bluetooth projects, leverage the BLE library to advertise services and handle client connections. Configure GPIO pins as INPUT or OUTPUT using pinMode() function, read analog values with analogRead() on ADC-capable pins, and control PWM outputs with analogWrite(). Always add appropriate pull-up resistors (10k ohms) on I2C and SPI lines, and implement proper error handling for network timeouts and disconnections. Test power consumption in different sleep modes using a multimeter to optimize battery life for portable applications.
Frequently Asked Questions
What is the difference between ESP32-SOLO-1 and ESP32-WROOM-32?
The SOLO-1 features a single processor core running at 160MHz, while the WROOM-32 includes dual cores. The SOLO-1 is more cost-effective for applications requiring WiFi and Bluetooth without heavy computational loads. Both share identical wireless capabilities and GPIO count, making the choice dependent on processing requirements and budget constraints.
Can I use this module with Arduino Uno shields?
The ESP32-SOLO-1 is not pin-compatible with Arduino Uno due to different pin layouts and voltage levels. However, you can use it with custom shields designed for ESP32 or adapt Uno shields using level shifters and custom wiring. The Arduino IDE compatibility refers to software libraries, not hardware pin compatibility.
How do I upload code if I do not have a USB connector on the board?
The ESP32-SOLO-1 module requires a USB-to-UART converter (CH340G or CP2102) connected to the TX, RX, GND, and 3.3V pins. Connect the converter to your computer via USB, select the corresponding COM port in Arduino IDE, and upload your sketch. Some development boards integrate this converter onboard for convenience.
What is the maximum current draw from a single GPIO pin?
Each GPIO pin can safely source or sink up to 40mA. However, the total current from all GPIO pins combined should not exceed 120mA to avoid voltage regulation issues. Use external transistors or MOSFETs for controlling high-power loads like motors or relays.
Can I run both WiFi and Bluetooth simultaneously?
Yes, the ESP32-SOLO-1 supports simultaneous WiFi and Bluetooth operation. However, due to shared antenna and RF circuitry, performance may degrade when both protocols are active. The module automatically manages RF switching, but you may experience reduced WiFi throughput or Bluetooth range when both are enabled continuously.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
Why Buy from The Engineer Store
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
- Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy ESP32-SOLO-1 IoT Development Board Module for Arduino Online in India
Purchase the ESP32-SOLO-1 IoT Development Board Module for Arduino online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on ESP32-SOLO-1 IoT Development Board Module for Arduino with fast shipping and expert support.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.
ESP32-SOLO-1 IoT Development Board Module for Arduino
The ESP32-SOLO-1 is a single-core variant of the popular ESP32 microcontroller featuring a 160MHz Xtensa processor, integrated WiFi and Bluetooth connectivity, and 4MB of flash memory for IoT and embedded applications. Professional developers, hobbyists, and industrial automation engineers use this module to rapidly prototype connected devices, sensor networks, and smart home applications that require low-power wireless communication. This board solves the critical challenge of integrating WiFi connectivity with Arduino-compatible programming while maintaining a compact form factor and cost-effective solution for IoT deployments.
Product Overview
The ESP32-SOLO-1 operates on a dual-stack architecture combining a 32-bit Xtensa processor running at 160MHz with dedicated hardware for WiFi 802.11 b/g/n and Bluetooth 4.2 protocols. The module integrates a complete RF front-end, power management circuit, and clock oscillator on a single chip, eliminating the need for external components. This design approach provides developers with a production-ready platform that handles complex wireless protocols at the hardware level while exposing a simple GPIO and SPI/I2C interface for sensor integration and peripheral control.
What distinguishes the SOLO-1 variant is its single-core configuration optimized for cost-sensitive applications where dual-core processing is unnecessary. The module features 520KB of SRAM for runtime operations, 4MB of SPI flash for program storage and OTA updates, and 1KB of eFuse for secure boot and encryption keys. Built-in ADC converters with up to 12-bit resolution enable analog sensor measurements, while PWM outputs support motor control and LED dimming. The Arduino IDE compatibility ensures seamless integration into existing development workflows without requiring proprietary tools or steep learning curves.
Key Specifications
| Specification | Details |
| Product Type | Single-Core WiFi and Bluetooth IoT Microcontroller Module |
| Brand | Espressif Systems |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| Processor | 32-bit Xtensa Single-Core @ 160MHz |
| RAM | 520KB SRAM |
| Flash Memory | 4MB SPI Flash |
| Wireless Connectivity | WiFi 802.11 b/g/n and Bluetooth 4.2 LE |
| GPIO Pins | 34 total (28 usable as digital I/O) |
| ADC Channels | 12-bit SAR ADC with 8 channels |
| Operating Voltage | 3.3V |
| Power Consumption | 80mA active, 10uA deep sleep |
Key Features
- Dual Protocol Wireless: Integrated WiFi and Bluetooth 4.2 LE for simultaneous connectivity to cloud platforms and mobile applications without external modules
- Arduino Compatible: Fully supported by Arduino IDE with ESP32 board package, enabling C++ programming with familiar libraries and rapid prototyping
- Low Power Modes: Deep sleep at 10 microamps and light sleep at 0.8mA for battery-powered IoT devices requiring months of operation on single charge
- Rich Peripheral Set: 12-bit ADC, SPI, I2C, UART, and PWM outputs enabling direct integration of sensors, displays, and actuators without additional interface circuits
- Secure Boot and Encryption: Built-in AES-128 encryption, SHA-256 hashing, and RSA signature verification for secure firmware updates and data protection
- OTA Updates: Over-the-air firmware update capability via WiFi, allowing remote maintenance and feature deployment without physical access to devices
Applications and Use Cases
- Smart Home Automation: WiFi-enabled smart switches, thermostats, and lighting controllers that communicate with cloud platforms and mobile apps for remote monitoring and scheduling
- Industrial IoT Sensors: Temperature, humidity, and pressure monitoring nodes in manufacturing facilities that transmit data to MQTT brokers for real-time analytics and predictive maintenance
- Wearable Devices: Bluetooth-connected fitness trackers and health monitoring devices that sync data to smartphones while maintaining ultra-low power consumption through sleep modes
- Environmental Monitoring: Weather stations and air quality sensors that log data locally and transmit periodic updates via WiFi to cloud databases for long-term trend analysis
- Robotics and Drones: Motor control boards with WiFi telemetry for autonomous vehicles requiring real-time communication and sensor fusion with onboard processing
How to Use
Begin by installing the ESP32 board package in Arduino IDE through the Boards Manager using the URL https://dl.espressif.com/dl/package_esp32_index.json. Connect the ESP32-SOLO-1 to your computer via USB-to-UART adapter (CH340G or CP2102), select the correct board and COM port, and verify the connection by uploading the blink sketch. The module operates at 3.3V logic levels, so ensure all external sensors and devices are compatible or use level shifters for 5V peripherals to prevent damage.
For WiFi applications, use the built-in WiFi library to scan networks and connect to your SSID with credentials. For Bluetooth projects, leverage the BLE library to advertise services and handle client connections. Configure GPIO pins as INPUT or OUTPUT using pinMode() function, read analog values with analogRead() on ADC-capable pins, and control PWM outputs with analogWrite(). Always add appropriate pull-up resistors (10k ohms) on I2C and SPI lines, and implement proper error handling for network timeouts and disconnections. Test power consumption in different sleep modes using a multimeter to optimize battery life for portable applications.
Frequently Asked Questions
What is the difference between ESP32-SOLO-1 and ESP32-WROOM-32?
The SOLO-1 features a single processor core running at 160MHz, while the WROOM-32 includes dual cores. The SOLO-1 is more cost-effective for applications requiring WiFi and Bluetooth without heavy computational loads. Both share identical wireless capabilities and GPIO count, making the choice dependent on processing requirements and budget constraints.
Can I use this module with Arduino Uno shields?
The ESP32-SOLO-1 is not pin-compatible with Arduino Uno due to different pin layouts and voltage levels. However, you can use it with custom shields designed for ESP32 or adapt Uno shields using level shifters and custom wiring. The Arduino IDE compatibility refers to software libraries, not hardware pin compatibility.
How do I upload code if I do not have a USB connector on the board?
The ESP32-SOLO-1 module requires a USB-to-UART converter (CH340G or CP2102) connected to the TX, RX, GND, and 3.3V pins. Connect the converter to your computer via USB, select the corresponding COM port in Arduino IDE, and upload your sketch. Some development boards integrate this converter onboard for convenience.
What is the maximum current draw from a single GPIO pin?
Each GPIO pin can safely source or sink up to 40mA. However, the total current from all GPIO pins combined should not exceed 120mA to avoid voltage regulation issues. Use external transistors or MOSFETs for controlling high-power loads like motors or relays.
Can I run both WiFi and Bluetooth simultaneously?
Yes, the ESP32-SOLO-1 supports simultaneous WiFi and Bluetooth operation. However, due to shared antenna and RF circuitry, performance may degrade when both protocols are active. The module automatically manages RF switching, but you may experience reduced WiFi throughput or Bluetooth range when both are enabled continuously.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
Why Buy from The Engineer Store
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
- Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy ESP32-SOLO-1 IoT Development Board Module for Arduino Online in India
Purchase the ESP32-SOLO-1 IoT Development Board Module for Arduino online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on ESP32-SOLO-1 IoT Development Board Module for Arduino with fast shipping and expert support.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.