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ESP32
From dankwiki
A series of 32-bit microcontroller units from Espressif, the successor to their ESP8266.
There is a three part nomenclature (taken from the Product Selector: the SoC, the module, and the devkit. The SoC is the lowest-level component; it contains the processor(s), radio(s), SRAM, and possibly flash+PSRAM. A module adds several elements to the SoC (perhaps most importantly, an FCC-approved RF stack), but will still require some circuit design to use. A devkit bundles a module onto a PCB along with other components (perhaps most importantly, a USB interface), and can generally be used by itself.
Annoyances
- There are plenty of SMT MOSFETs that will work with the ESP32, but the only through-hole MOSFET I've found that works a damn off its 3.3V output is the (pricey!) Infineon IRLZ44N.
- The ADC is known to be nonlinear and generally not great.
- Devkits with an onboard RGB LED often need a bridge soldered between two points on the board before the LED will function (possibly to avoid accidental eye damage; it's pretty bright).
SoCs
As of 2024-12:
| SoC | WiFi | Bluetooth | Thread/Zigbee | Temps (C) | GPIOs | Flash | SRAM | PSRAM | Max freq |
|---|---|---|---|---|---|---|---|---|---|
| ESP32-S3 | 802.11b/g/n | LE v5.0 | N/A | -40–105 | 45 | 0, Quad | 512 | 0, Quad | 240 |
| ESP32-S3 | 802.11b/g/n | LE v5.0 | N/A | -40–105 | 45 | 0, Quad | 512 | 0, Quad | 240 |
| ESP32-S3R2 | 802.11b/g/n | LE v5.0 | N/A | -40–85 | 45 | 0, Quad | 512 | 2, Quad | 240 |
| ESP32-S3R8 | 802.11b/g/n | LE v5.0 | N/A | -40–65 | 45 | 0, Quad | 512 | 8, Octal | 240 |
| ESP32-S3-PICO-1-N8R2 | 802.11b/g/n | LE v5.0 | N/A | -40–85 | 39 | 8, Quad | 512 | 2, Quad | 240 |
| ESP32-C5NR4 | 802.11b/g/n/ax | LE v5.0 | Yes | -40–85 | 22 | 0 | 384 | 4 | 240 |
| ESP32-C5NF4 | 802.11b/g/n/ax | LE v5.0 | Yes | -40–85 | 22 | 4 | 384 | 0 | 240 |
| ESP32-S3R8V | 802.11b/g/n | LE v5.0 | N/A | -40–65 | 45 | 0, Quad | 512 | 8, Octal | 240 |
| ESP32-S3FN8 | 802.11b/g/n | LE v5.0 | N/A | -40–85 | 45 | 8, Quad | 512 | 0, Quad | 240 |
| ESP32-C3 | 802.11b/g/n | LE v5.0 | N/A | -40–105 | 22 | 0, Quad | 400 | 0, Quad | 160 |
| ESP32-C3FN4 | 802.11b/g/n | LE v5.0 | N/A | -40–85 | 22 | 4, Quad | 400 | 0, Quad | 160 |
| ESP32-C3FH4 | 802.11b/g/n | LE v5.0 | N/A | -40–105 | 22 | 4, Quad | 400 | 0, Quad | 160 |
| ESP32-C3FH4X | 802.11b/g/n | LE v5.0 | N/A | -40–105 | 22 | 4, Quad | 400 | 0, Quad | 160 |
| ESP32-S2 | 802.11b/g/n | N/A | N/A | -40–105 | 43 | 0, Quad | 320 | 0, Quad | 240 |
| ESP32-S2R2 | 802.11b/g/n | N/A | N/A | -40–85 | 43 | 0, Quad | 320 | 2, Quad | 240 |
| ESP32-S2FH2 | 802.11b/g/n | N/A | N/A | -40–105 | 43 | 2, Quad | 320 | 0, Quad | 240 |
| ESP32-S2FH4 | 802.11b/g/n | N/A | N/A | -40–105 | 43 | 4, Quad | 320 | 0, Quad | 240 |
| ESP32-S2FN4R2 | 802.11b/g/n | N/A | N/A | -40–85 | 43 | 4, Quad | 320 | 2, Quad | 240 |
| ESP32-D0WD-V3 | 802.11b/g/n | BR/EDR + LE v4.2 | N/A | -40–125 | 34 | 0, Quad | 520 | 0, Quad | 240 |
| ESP32-D0WD | 802.11b/g/n | BR/EDR + LE v4.2 | N/A | -40–125 | 34 | 0, Quad | 520 | 0, Quad | 240 |
| ESP32-D0WDQ6-V3 | 802.11b/g/n | BR/EDR + LE v4.2 | N/A | -40–125 | 34 | 0, Quad | 520 | 0, Quad | 240 |
| ESP32-D0WDQ6 | 802.11b/g/n | BR/EDR + LE v4.2 | N/A | -40–125 | 34 | 0, Quad | 520 | 0, Quad | 240 |
| ESP32-U4WDH | 802.11b/g/n | BR/EDR + LE v4.2 | N/A | -40–105 | 34 | 4, Quad | 520 | 0, Quad | 240 |
| ESP32-S0WD | 802.11b/g/n | BR/EDR + LE v4.2 | N/A | -40–125 | 34 | 0, Quad | 520 | 0, Quad | 160 |
| ESP32-PICO-V3 | 802.11b/g/n | BR/EDR + LE v4.2 | N/A | -40–85 | 31 | 4, Quad | 520 | 0, Quad | 240 |
| ESP32-PICO-V3-02 | 802.11b/g/n | BR/EDR + LE v4.2 | N/A | -40–85 | 29 | 8, Quad | 520 | 2, Quad | 240 |
| ESP32-PICO-D4 | 802.11b/g/n | BR/EDR + LE v4.2 | N/A | -40–85 | 34 | 4, Quad | 520 | 0, Quad | 240 |
| ESP8266EX | 802.11b/g/n | N/A | N/A | -40–125 | 17 | 0, Quad | 160 | 0, Quad | 160 |
| ESP8285N08 | 802.11b/g/n | N/A | N/A | -40–85 | 17 | 1, Quad | 160 | 0, Quad | 160 |
| ESP8285H16 | 802.11b/g/n/ax + 9GHz | N/A | N/A | -40–105 | 17 | 2, Quad | 160 | 0, Quad | 160 |
| ESP32-S3FH4R2 | 802.11b/g/n | LE v5.0 | N/A | -40–85 | 45 | 4, Quad | 512 | 2, Quad | 240 |
| ESP8685H4 | 802.11b/g/n | LE v5.0 | N/A | -40–105 | 15 | 4, Quad | 400 | 0, Quad | 160 |
| ESP8684H2 | 802.11b/g/n | LE v5.3 | N/A | -40–105 | 14 | 2, Quad | 272 | 0, Quad | 120 |
| ESP8684H4 | 802.11b/g/n | LE v5.3 | N/A | -40–105 | 14 | 4, Quad | 272 | 0, Quad | 120 |
| ESP32-C6 | 802.11b/g/n/ax | LE v5.3 | Available | -40–105 | 30 | 0, Quad | 512 | 0, Quad | 160 |
| ESP32-C6FH4 | 802.11b/g/n/ax | LE v5.3 | Available | -40–105 | 22 | 4, Quad | 512 | 0, Quad | 160 |
| ESP32-C6FH8 | 802.11b/g/n/ax | LE v5.3 | Available | -40–105 | 22 | 8, Quad | 512 | 0, Quad | 160 |
| ESP32-H2FH2 | N/A | LE v5.3 | Available | -40–105 | 19 | 2, Quad | 320 | 0, Quad | 96 |
| ESP32-H2FH4 | N/A | LE v5.3 | Available | -40–105 | 19 | 4, Quad | 320 | 0, Quad | 96 |
| ESP32-S3-PICO-1-N8R8 | 802.11b/g/n | LE v5.0 | N/A | -40–65 | 39 | 8, Quad | 512 | 8, Octal | 240 |
| ESP32-P4NRW16 | N/A | N/A | -40–85 | 55 | 0 | 768 | 16 | 400 | |
| ESP32-P4NRW32 | N/A | N/A | -40–85 | 55 | 0 | 768 | 32 | 400 | |
| ESP32-C61HR2 | 802.11b/g/n/ax | LE v5.0 | NA | -40–105 | 18 | 0, Quad | 320 | 2, Quad | 120 |
| ESP32-D0WDR2-V3 | 802.11b/g/n | BR/EDR + LE v4.2 | N/A | -40–85 | 33 | 0, Quad | 520 | 2, Quad | 240 |
ESP32-S3
The ESP32-S3 is a fantastic little update to the classic ESP32. Some notes:
- Powering via 5V USB is recommended.
- Voltage on GPIO47 and GPIO48 is only 1.8 (VSPI), unlike the other pins (3.3, VDD).
- There are no default I2C pins. All GPIOs can be used with either of the two controllers with no penalty.
- Some devkits require the two RGB pads to be shorted before their WS2812 RGB LED can be used
- I suspect this is because the WS2812 can damage the eyes if looked at directly? Unsure.
- Version 1.0 of the DevKitC had the WS2812 on IO48; Version 1.1 has it on IO38.
External links
- ESP32 on Wikipedia
