Packed in with amazing features and peripherals, wireless connectivity and support for an amazing amount of Flash and extra PSRAM.
Need something super Tiny with no compromises? Sure, we've got you covered! What about a board that has Pro features that you can use on your existing PCB design? Yup, we have that too!
The TinyS3 is the successor to our hugely popular TinyPICO, featuring more Flash & PSRAM, WiFi, Bluetooth 5 + more!
The FeatherS3 is a powerhouse of features in the super popular Feather format & huge ecosystem!
"The Tiny Mighty ESP32-S3 Development Board"
The TinyS3 is the smallest, fully featured ESP32-S3 board on the market.
"The Pro ESP32-S3 Development Board in the Feather Format"
The FeatherS3 is the magnificent successor to our super popular FeatherS2!
"The Ultimate Pro ESP32-S3 Development Board"
The ProS3 is the TinyS3 but on steroids!
That is by design! The power and charge LEDs and corresponding resistors drain the battery, so they've been isolated to the 5V power domain so they will only light up and draw power when the board is either being powered by the USB connector, or by a 5V power source connected to the 5V header pin.
That is the correct behaviour! The charge IC can’t tell the difference between a full battery and no battery, so it cycles between trying to charge and not charge.
If you are not using a battery on your project, or you don't need the use of the charge status LED, you can disconnect it by cutting the jumper on the back of the board, as indicated.
Each of the boards has an IO connected to a voltage divider on the battery to be able to read an approximation of the current voltage left in the battery. please check the Pinout card for the IO specific to your board. Note: Check the helper library for your board for a function that lets you read the state.
Each of the boards has an IO connected to a voltage divider on the 5V power rail that you can read to determine if there is a 5V power source connected or not. This allows you to alter your code based on the source powering your board in your project. Note: Check the helper library for your board for a function that lets you read the state.
RX & TX are still connected to UART0, and still used with the USB when in CDC (download mode). Otherwise, you can use them as UART0 when connecting a module that uses serial, or use them as general IO, it's up to you.
The 5V pin on your board is an in and out pin. As an input, it will accept a voltage range between 4.8V and 5.2V. Please do not connect any power source over 5.2V to the 5V pin and please do not connect your battery to the 5V pin. It is for a 5V power source only.
When USB power is connected, you will get approximately 4.9V out of the 5V pin. The voltage drop is due to the reverse USB power diode that allows the USB and 5V pin to be power inputs at the same time, and prevents back feeding power into the USB.
The use case for having both connected is when you want to power your board from the 5V pin from an external 5V power source, but you also want to connect the USB to flash the board, or to get serial output.
Short answer? No. The 5V pin is for an external 5V supply input to the 5V power rail. The 5V rail has several additional connected components - such as the power LED - that will unnecessarily consume battery power.
Connect your battery to the VBAT pin or battery connector to minimise battery consumption.
Absolutely not! The 3V3 pin bypasses the onboard 3V3 LDO regulator, and if you connect a battery that can be as high as 4.2/4.3V, you could potentially damage components on the 3V3 rail that can't handle higher voltages than 3V3, including the ESP32-S3 chip itself.
This is really a tough question to answer as there are so many external factors that can affect WiFi & BLE radio performance, including the construction of the building you are in, your network layout, power or RF noise in your area and where you are placing your board.
All we can say is we spent a great deal of time tuning the matching network and the antenna implementation, to ensure it’s the best it can be. The rest is up to you and your environment.
To get your board into UF2 bootloader mode (assuming you have not stomped your CircuitPython install with Arduino/IDF or MicroPython) you can simply click [RESET], then when the RGB LED is purple, click [BOOT] and you will enter UF2 bootloader mode. You will then see the RGB LED on your board turn green once the filesystem is mounted.
You can re-flash the UF2 bootloader onto your boards by following these instructions.
You can switch between each development environment, but each time you will need to put your board into download mode by holding [BOOT], clicking [RESET] and then releasing [BOOT] and then flashing the respective firmware you require onto the board.
Hopefully soon MicroPython will have a version that you can load via the UF2 bootloader, stay tuned!
If you ever find you have gotten your board into a bad state with CircuitPython - Maybe you accidentally got it stuck in read-only mode or maybe it's stuck in a boot loop, you can put your board into safe mode which will boot the board, but not run any of the code. You can then fix your issue and reset the board.
To get into safe mode, follow these steps:
Your board should now be in safe mode.
The 5V pin can only produce 5V if there is a 5V source connected to the board via the USB connector. There is no boost/step-up converter on these boards to provide 5V from the VBAT input.
If you want to run off battery and require a 5V supply for an external module or sensor, you'll need to provide your own external boost converter. Something like the 5V Step-Up/Step-Down Voltage Regulator S7V7F5 from Pololu.
There is a known issue where the firmware is copied and then the board reboots itself before your OS thinks the file has completed copying. The file did copy, and the board should have rebooted itself and you should see the mounted CircuitPython drive.
That's correct! LDO 2 is tied to both an IO and VDD for the Flash/PSRAM, so when the ESP32-S3 goes into deep sleep, it automatically shuts down LDO 2 for you, so you don't have to remember to do it yourself.