Can I connect my battery to the 3V3 pin?
Absolutely not! The 3V3 pin bypasses the onboard 3V3 LDO regulator, and if you connect a battery that can be as...
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Can I connect my battery to the 5V pin?
Short answer? No. The 5V pin is for an external 5V supply input to the 5V power rail. The 5V rail... -
Can I power my board from the 3V3 pin?
All Unexpected Maker boards have a 3V3 pin on the header, that works as either an Input or Output, depending... -
Do I have to use the default SPI/I2C/UART pins when connecting modules to my board?
No you don’t have to use the default SPI, I2C and UART pins that are marked on the pinout card... -
Do I need drivers for my board?
ESP3-S2 & ESP32-S3 If you are using an Unexpected Maker ESP32-S2 or ESP32-S3 board and are running Linux, macOS or... -
How do I erase the flash on my board?
Often you’ll want to erase the flash of your board to get it back to a clean state. This is... -
How fast will my battery charge?
The battery charge rate on all Unexpected Maker boards is set to 330mA based on the 3K3 charge resistor used.... -
I followed a learn guide and it’s not working on my board
If the learn guide and code was written to run on a specific board, the code could be using pin... -
I’m trying to use the RGB LED, but it’s not lighting up
On the ProS3, FeatherS3, FeatherS2 and FeatherS2 Neo, the RGB LED is powered via LDO2, so you need to enabled... -
I’ve set my RGB LED to black/clear and it’s still drawing current?
All RGB LEDs have a quiescent current of between 500uA and 1mA, so even setting them to display nothing still... -
Is there a 3D model for my board?
Often, 3D models of development boards are used inside CAD packages to design enclosures, or to show how it integrates... -
Pinout cards for UM dev boards
Below you’ll find all of the pinout cards for the Unexpected Maker development boards. Click on an image to open... -
Powering your board from battery
All Unexpected Maker development boards come with support for using a Lithium Polymer battery to power your projects as well... -
Schematics for UM dev boards
Below you’ll find GitHub and website links for PDF schematics for a range of Unexpected Maker development boards. ESP32 based... -
Sometimes my battery doesn’t start charging when I plug it in
If you have 5V power connected to your board before you plug your battery in, sometimes it might no start... -
What does the RESET pin and button actually do?
The Reset pin on all ESP32 chips (also known as the EN pin) is a power shutdown pin, that when... -
What firmware is on my board when I receive it?
ESP32-S2 & ESP32-S3 All ESP32-S2 and ESP32-S3 boards that ship from Unexpected Maker come with a version of CircuitPython installed,... -
What version of Bluetooth is on my board?
Unexpected Maker TinyPICO and ESP32-S3 boards ship with Bluetooth capabilities, but they differ in what classes you get and the... -
What WiFi and BLE range can I expect?
This is really a tough question to answer as there are so many external factors that can affect WiFi &... -
Which pins can do PWM?
Almost all IO on an ESP32 can do PWM – they are no specific IO reserved for this. You are... -
Why are there no I2S pins marked on the pinout cards?
Like most peripherals on the ESP32, you can use almost any free IO on the headers as I2S pins. Because... -
Why don’t I get 5V output on the 5V pin when running off battery?
The 5V pin can only produce 5V if there is a 5V source connected to the board via the USB...