Wemos LOLIN32 Lite Board Powered by ESP32 Rev 1 Chip Sells for $4.90

Wemos introduced the first low cost ESP32 board with LOLIN32 board going for $6.90 plus shipping in April, but the company is now back with a new Lite version of the board switching ESP-WROOM-32 module with their own design around ESP32 Rev 1 chip (with various silicon bug fixes), and a lower $4.90 price tag to which you need to add ~$2 for shipping.

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Wemos LOLIN32 Lite is also smaller, so we’ll lose some of the pins (mostly extra power pins), but the I/Os look the same:

  • SoC – Espressif ESP32-DOWD6Q Rev 1.0 dual core Tensilica Xtensa LX6 processor with WiFi and BLE
  • Connectivity – 802.11 b/g/n WiFi + Bluetooth LE
  • I/Os via 2x 13-pin headers with digital I/Os, analog inputs, UART, I2C, SPI, VP/VN, DAC…
    • 3.3V I/O voltage
    • Breadboard compatible
  • USB – 1x micro USB port for power and programming/debugging
  • Misc – Reset button
  • Power – 5V via micro USB + battery header for Lithium battery (charging current: 500mA max)
  • Dimensions & Weight – TBD

The board sold on Aliexpress is pre-loaded with micropython firmware, but you could also change that to Arduino, or other supported firmware. The Wiki has limited information for now.

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gung sukma
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gung sukma

can I charge a 18650 battery (ex notebook) or phone battery (lithium ion) with it (of course doing some soldering first)? or it is only for some special battery with the connector.

itchy n scratchy
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itchy n scratchy

It depends on the charging voltage, if this charger has the right voltage for your cell (or slightly lower, with a capacity penalty…) then it should be safe. If the charger has a higher voltage than the cell you would overcharge, and thus overheat your cell. If soldering and comparing specs is yours you should be good for an experiment.

Gung Sukma
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Gung Sukma

@itchy n scratchy
Well, I don’t have datasheet for the battery, I disassembled a notebook battery.
But I think lithium ion is 3.7V and is safe to charge up to 4.2V.
And ESP32 is 3.3V voltage then it may be the right battery.

So I charge it and touch the battery, no heat.

Seem fine.

It is very nice to have microcontroller that run on battery and while keeping it alive, can be charged.