Not recommended for new designs - prefer a newer module for future projects.
ESP32 Boards/ ESP32/ ESP32-SOLO-1

ESP32-SOLO-1

NRND SOLO

ESP32-SOLO-1 is a powerful, generic Wi-Fi+BT+Bluetooth LE MCU module that targets a wide variety of applications, ranging from low-power sensor networks to the most demanding tasks, such as voice encoding, music streaming and MP3 decoding.

ESP32-SOLO-1 module
18 × 25.5 mm
4MB
Flash
None
PSRAM
38
GPIO pins
18×25.5mm
Size

Specifications

Datasheet ↗

Module

FamilySOLO
Embedded chipESP32-S0WD
GPIO pins38
AntennaPCB antenna
Dev boardESP32-DevKitC
Operating temp-40°C ~ 85°C
Dimensions18 × 25.5 × 3.1 mm

Memory

Flash4 MB
PSRAMNone

Connectivity

Wi-Fi802.11 b/g/n (2.4 GHz)
Bluetooth4.2
BLE4.2

Module variants

2 variants
Base lowest-cost config Top highest spec High-temp extended temperature range
VariantFlashPSRAMTags
ESP32-SOLO-1-N44 MB-Base
ESP32-SOLO-1-H44 MB-High-temp

About the ESP32-SOLO-1

ESP32-SOLO-1 is a single-core Wi-Fi + Bluetooth module based on the ESP32-S0WD chip, optimized for cost-sensitive and low-power applications.

  • Single-core ESP32-S0WD for lower power consumption
  • 2.4 GHz Wi-Fi and Bluetooth Classic/LE
  • Operating temperature: -40°C ~ 85°C
  • Size: 18 x 25.5 x 3.1 mm
  • Integrated PCB antenna
  • Great for smart sensors and simple IoT devices

The ESP32-SOLO-1 is designed for cost-sensitive applications that still require reliable Wi-Fi and Bluetooth connectivity. It features a single-core ESP32-S0WD chip, which provides a balance of performance and power efficiency, making it ideal for simple IoT devices, smart sensors, and other low-power applications.

Compared to the dual-core ESP32 modules, the SOLO-1 is optimized for lower power consumption while still delivering essential connectivity features. It’s perfect for projects where cost and energy efficiency are top priorities.

The module is available in two variants:

  • ESP32-SOLO-1-N4: This is the basic variant with 4MB of flash, suitable for most low-power IoT applications.
  • ESP32-SOLO-1-H4: This high-temperature variant is designed for industrial and outdoor applications where reliability in extreme heat is essential, also with 4MB of flash.

In short, the ESP32-SOLO-1 is your go-to module for cost-effective, low-power IoT designs that still need solid Wi-Fi and Bluetooth performance. Whether you’re building a smart sensor, a simple home automation device, or a low-power industrial controller, this module delivers the essential features you need without breaking the bank.

Other ESP32 modules

18 more
ESP32-WROOM-32E moduleESP32-WROOM-32E active WROOM ESP32-WROOM-32E integrates ESP32-D0WD-V3, with higher stability and safety... ESP32-WROOM-32UE moduleESP32-WROOM-32UE active WROOM ESP32-WROOM-32UE integrates ESP32-D0WD-V3, with higher stability and safety... ESP32-WROVER-E moduleESP32-WROVER-E active WROVER ESP32-WROVER-E integrates ESP32-D0WD-V3, with higher stability and safety... ESP32-WROVER-IE moduleESP32-WROVER-IE active WROVER ESP32-WROVER-IE integrates ESP32-D0WD-V3, with higher stability and safety... ESP32-MINI-1 moduleESP32-MINI-1 active MINI ESP32-MINI-1 is a highly-integrated, small-sized Wi-Fi+Bluetooth®+Bluetooth® LE MCU... ESP32-MINI-1U moduleESP32-MINI-1U active MINI ESP32-MINI-1U is a highly-integrated, small-sized Wi-Fi + Bluetooth® + Bluetooth® LE... ESP32-PICO-MINI-02 moduleESP32-PICO-MINI-02 active PICO ESP32-PICO-MINI-02 is a small-sized powerful Wi-Fi+Bluetooth®+Bluetooth® LE MCU... ESP32-PICO-MINI-02U moduleESP32-PICO-MINI-02U active PICO ESP32-PICO-MINI-02U is a small-sized powerful Wi-Fi+Bluetooth®+Bluetooth® LE MCU... ESP32-PICO-V3 moduleESP32-PICO-V3 active PICO ESP32-PICO-V3-ZERO moduleESP32-PICO-V3-ZERO active PICO ESP32-PICO-V3-ZERO is an Alexa Connect Kit (ACK) module with Espressif. It provides... ESP32-WROOM-32D moduleESP32-WROOM-32D nrnd WROOM ESP32-WROOM-32D integrates ESP32-D0WD. It targets a wide variety of applications,... ESP32-WROOM-32U moduleESP32-WROOM-32U nrnd WROOM ESP32-WROOM-32U integrates ESP32-D0WD. It integrates a U.FL connector. ESP32-WROOM-32 moduleESP32-WROOM-32 nrnd WROOM ESP32-WROOM-32 contains the ESP32 SoC, flash memory, high-precision discrete... ESP32-WROVER-B moduleESP32-WROVER-B nrnd WROVER ESP32-WROVER-B is a powerful, generic WiFi-BT-Bluetooth LE MCU module that targets a... ESP32-WROVER-IB moduleESP32-WROVER-IB nrnd WROVER ESP32-WROVER-IB is a powerful, generic Wi-Fi+BT+Bluetooth® LE MCU module that... ESP32-WROOM-DA moduleESP32-WROOM-DA eol WROOM ESP32-WROOM-DA is a powerful Wi-Fi + Bluetooth + Bluetooth LE MCU module with the... ESP32-DU1906 moduleESP32-DU1906 eol DU1906 ESP32-DU1906 is an AIoT voice module powered by ESP32-D0WD-V3 and Baidu's HongHu... ESP32-DU1906-U moduleESP32-DU1906-U eol DU1906 ESP32-DU1906-U is an AIoT voice module powered by ESP32-D0WD-V3 and Baidu's HongHu...