esp32: Update the README details to account for newer chips. #17777
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Noted while adding C2 support that some of these comments are a bit out of date. Spun out to its own commit. This work was funded through GitHub Sponsors. Signed-off-by: Angus Gratton <angus@redyak.com.au>
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dpgeorge
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Jul 29, 2025
| - The machine module with GPIO, UART, SPI, software I2C, ADC, DAC, PWM, | ||
| TouchPad, WDT and Timer. | ||
| - The network module with WLAN (WiFi) support. | ||
| - Bluetooth low-energy (BLE) support via the bluetooth module. | ||
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| Initial development of this ESP32 port was sponsored in part by Microbric Pty Ltd. | ||
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| Choosing Correct Chip |
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Suggest "Choosing the correct chip" or "Choosing a chip"
| ESP32 chips are not all the same. The different ESP32 families have different | ||
| capabilities and resources available. In particular, the ESP32-C2 and ESP32-S2 | ||
| (without external SPIRAM) have the least RAM. They can still run MicroPython | ||
| well but may run out of RAM if a program uses a lot of resources (i.e. if it |
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Suggest removing the parenthesis for this last sentence (it's important information), and changing "ie" to "eg".
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| The supported ESP32 chip with the most hardware resources is the ESP32-S3 with | ||
| external SPIRAM included (usually 2MB, 4MB, or 8MB). | ||
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Is it worth mentioning some other higher-level items, eg native USB, WiFi and BLE support? Also the CPU architecture?
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Summary
Noted while adding C2 support in #15906 that some of the points in the README are a little out of date. spun out to its own PR to avoid clogging up that PR, but should be merged after #15906 as it refers to ESP32-C2 in the new text.
This PR also adds some recommendation on which ESP32 board to pick, as we occasionally see issues or questions that would be non-issues on a board with more RAM (and for small production or personal projects the savings of picking a cheaper ESP32 chip are basically neglible).
This work was funded through GitHub Sponsors.