ESP32-SOLO-1 is a Single Core ESP32 WiFi and Bluetooth Module

Espressif ESP32 is popular dual core processor with built-in WiFi and Bluetooth connectivity, except as we’ve seen last year, the company also developed a single core version with ESP32-S0WD chip, whose price is only slightly more expensive than ESP8266.

But so far, I had not seen many hardware platforms announced with the single core version, with the exception of Particle Argon board. But I believe we should soon see more ESP32-S0WD boards brought to market, since Espressif Systems has now announced ESP32-SOLO-1 single core module.

ESP32-SOLO-1 Module

ESP32-SOLO-1 wireless module specifications:

  • SoC – Espressif ESP32-S0WD single core Tensilica Xtensa LX6 processor @ up to 160 MHz with 448 KB ROM, 520KB on-chip SRAM, and 16KB SRAM in RTC
  • Storage – 4MB SPI flash
  • Connectivity
    • 2.4 GHz 802.11 b/g/n WiFi up to 150 Mbps
    • Bluetooth 4.2 LE + EDR
  • I/Os – SD card, UART, SPI, SDIO, I2C, LED PWM, motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC
  • Supply Voltage – 2.7 to 3.6V
  • Minimum Current from power supply – 500 mA
  • Sleep Current – < 5 μA
  • Dimensions – 25 x 18 x 3.1 mm
  • Temperature Range – -40 to +85°C
  • Certifications – FCC/CE/IC/KCC/SRRC/NCC/TELEC

ESP32-SOLO-1 is suitable for various applications such as low-power sensor networks, voice encoding, music streaming and MP3 decoding.

You’ll find the full details in the datasheet. With regards to pricing, I could only find it on YOYCART,  where it is sold for $5.54 per unit plus shipping if you order 11 or more, but I’d expect the price to fall further since ESP32-WROOM-32 can be found on Aliexpress for under $4 shipped.

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Is there any power savings compared to running with 1 core disabled? If not then the only reason to use it will be price advantage.

I thought they were also going to make a WiFi only version to shave a few more cents off via reduced royalties on BT IP.

PuceBaboon
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The normal “clear as mud” documentation from Espressif …Refer to the ESP32 Datasheet …Refer to the ESP32 Datasheet. Pffft!

So, it’s single core, but does it have a ULP??? According to the “Refer to the ESP32 Datasheet”, it does.

At least it still has more I/O and better peripherals (ie:- ADC channels) than the ESP8266, so it’s still a better deal if the prices are roughly equivalent.